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SPAG 330 CGenerator protection

User´s manual and Technical description

RS 643 Ser.No.

fn = 50 60 Hz

SPAG 330 C

80...265 V

18...80 V –

Uaux

0 000

2

5

887

12345678

SGR

0 1

~–

0 0000 000

U1 U2 U3

SPCP 3C2 SPCJ 3C3 SPCJ 1C8

/ >tt

n/II

n )( >I

n )( >>I

12345 >>/ tt

12345

n/o II

>o )In(123456

/ nU U

n( )>U>>n( )U

/tt u

(n )Pn/P P

%[ ]%[ ]

%[ ]%[ ]

nI = /1 5 A( )oI

nI = /1 5 A( , )I P

nU /= V( , )U100 110 PIRF

>U

I PU66

6B

[ ]sut0.6

0.1 1.0

10

2.0

6.0

1.0 12

0.8

1.2

1.6

STEP

RESET

SG1

0 1

12345678

P

nU>U

t [ ]s

<P

SPCP 3C2

nPP

20

p

[ ]%

>U>>U

STEP

L1 IRF

>I

L2I L3II

1309

[ ]sk

>t0.5

0.05 1.0

13

2.5

0.5

0.04 1.0

0.5

1.5

2.5

STEP

RESET

SG1

0 1

1234567820

STEP

>>I

nI>I

nI>>I

>>t [ ]s

>I >>I

SPCJ 3C3

B

>o )In( >/ >tt

>>/ tt%[ ]%[ ]

o IRFI

1311

[ ]sk

>t0.5

0.05 1.0

2.5

0.5

0.5

0.05 1.0

0.1

0.35

0.8

STEP

RESET

SG1

0 1

123456784.0

nI

nI

>>t [ ]s

SPCJ 1C8

B

I

>I o

>>I o

>>I o>I o

STEP

2

SPAG 330 CGenerator protection

1MRS 751246-MUM EN

Issued 2001-11-26Modified 2002-04-22Version B (replaces 34 SPAG 3 EN1)Checked MKApproved OL

Data subject to change without notice

Contents Application ..................................................................................................................... 2Description of function .................................................................................................. 3Connections ................................................................................................................... 4Control signals between the modules .............................................................................. 6Power supply module ...................................................................................................... 9Output relay module .................................................................................................... 10Application examples .................................................................................................... 11Technical data (modified 2002-04) ................................................................................ 14Maintenance and repairs ............................................................................................... 16Spare parts .................................................................................................................... 16Dimension drawings and mounting.............................................................................. 17

The complete manual for the generator protection SPAG 330 C contains the following partialmanuals:

Generator protection SPAG 330 C, general part 1MRS 751246-MUM ENOvervoltage and reverse power module SPCP 3C2 1MRS 751156-MUM ENOvercurrent relay module SPCJ 3C3 1MRS 750602-MUM ENNon-directional earth-fault relay module SPCJ 1C8 1MRS 750603-MUM ENGeneral characteristics of C-type relay modules 1MRS 750328-MUM EN

Application The generator protection SPAG 330 C is de-signed to be used for the protection of genera-tors and their prime movers.

The protection of the prime mover is based ona reverse power protection preventing the gen-erator from motoring. The generator is pro-tected by an overvoltage protection, a short-cir-cuit protection and an earth-fault protection.

The overvoltage protection is implemented as atwo-stage overvoltage protection. An overcur-rent protection provided with two operatingstages, a high-set stage and a low-set stage, isused for the short-circuit protection. The earth-fault protection of the generator protection iscarried out by means of two-stage neutral over-current module.

3

Description offunction

The relay protection package includes three meas-uring relay modules. The prime mover and thegenerator are protected against reverse power andovervoltage respectively by means of the over-voltage and reverse power relay module SPCP3C2. A three-phase overcurrent relay moduleSPCJ 3C3 is used for the short-circuit protection,and a non-directional earth-fault relay moduleSPCJ 1C8 for the earth-fault protection.

The overvoltage module has two operatingstages, U> and U>>. When the voltage exceedsthe setting value of the U>-stage, the stage startsand the operation indicator U> U>> is lit witha yellow light. When the set operating time haselapsed, the overvoltage stage delivers a trip com-mand to the output relay and the operation in-

dicator turns red. The overvoltage stage U>>operates in the same way as the U>-stage.

The reverse power stage measures the single-phase power between the generator and the net-work by means of the current on the phases L1and L2 and the corresponding phase-to-phasevoltage. When the direction of the active powershifts from the network towards the generator,the reverse power module starts and its opera-tion indicator is lit with a yellow light, whenthe setting value of the reverse power stage isexceeded. When the set operating time haselapsed, the module delivers a control signal tothe output relay and the operation indicator P<–is lit with a red light. The operation of the re-verse power stage is illustrated in fig. 1.

Fig. 1. The active power measured by the reverse power stage. The overvoltage and the reversepower module displays the power measured by the reverse power stage in the range -25...25% ofthe rated power Pn.

When a phase current exceeds the setting valueof the low-set stage of the overcurrent module,the module starts. At the same time the corre-sponding timing circuit is activated and the op-eration indicator of the stage is lit with a yellowlight. When the timing circuit has timed out,the module delivers a control signal to the out-put relay, at the same time as the operation in-dicator turns red. The high-set stage of the over-current module operates in the same way as thelow-set stage.

The earth-fault module has two neutral over-current stages, I0> and I0>>.

When the neutral current exceeds the settingvalue of the I0> stage, the stage starts and theoperation indicator of the stage is lit with a yel-low light. When the set operating time haselapsed, the module delivers a control signal tothe output relay, at the same time as the opera-tion indicator turns red. The high-set stage I0>>of the earth-fault module operates in the sameway as the low-set stage.

P/P (%)

2

3

2

3

Q

_

_

_

_Motor area

As generator

Tripping area

Measured power n

1 nPP = 95,0 %

P = 20,0 %

P = - 10,0 %2

3

/

/

/

nP

nP

– – –

2 0 . 0

– 1 0 . 0

Display output 100

50

P

P

_

1P 1

_S

S

S

4

Connections

Fig. 2. Connection diagram for the generator protection SPAG 330 C.

Uaux Auxiliary voltageA, B, C, D, E, F, G Output relaysIRF Self-supervisionSGR Switchgroup for tripping configurationU1 Overvoltage and reverse power module SPCP 3C2U2 Three-phase overcurrent module SPCJ 3C3U3 Non-directional earth-fault relay module SPCJ 1C8U4 Output relay module SPTR 7B1U5 Power supply module SPGU 240 A1 or SPGU 48 B2U6 Input/output module SPTE 6B7Rx/Tx Serial port

5 A

1 A

5 A

1 A

5 A

1 A

100

V11

0 V

1 1

IRF

IRF

IRF

U1

U2

U3

I/0

I/0

I/0

U>

U >>

I >

I >>

U5

P <

U6

63 1 2 3 4 5 6 7 8 9 13 141525 2627 61 62

+ -

+ (~)

- (~)Uaux

Rx Tx

SPA-ZC_

70 7172 64 65 66 67 68 69 73 74 75 76 77 78 79 80 81 82 83 84

EDCBAG F

Rx/Tx

1 2 3 4 5 6 7 8 SGR

L1L2L3

U4SPA

G 3

30 C

I >

I >>

5 A

1 A

5

Fig. 3. Rear wiew of the generator protection SPAG 330 C.

The terminals of the generator protection SPAG 330 C have the functions as follows:

Terminal Functionnumber

1-2 Current on phase L1 (5 A)1-3 Current on phase L1 (1 A)4-5 Current on phase L2 (5 A)4-6 Current on phase L2 (1 A)7-8 Current on phase L3 (5 A)7-9 Current on phase L3 (1 A)

13-14 Phase-to-phase voltage (100 V) measured by the reverse power module13-15 Phase-to-phase voltage (110 V) measured by the reverse power module

25-26 Neutral current of earth-fault protection I0 (5 A)25-27 Neutral current of earth-fault protection I0 (1 A)

61-61 Auxiliary voltage supply.The positive lead of the DC current supply is connected to terminal 61

63 Protective earth

64-65-66 Tripping contact in common for all the protection stages67-68-69 Tripping data of the high-set stage I>> of the overcurrent module

70-71-72 Self-supervision alarm. Operates on the closed-circuit principle, in normal servicethe contact gap 70-72 is closed. If the auxiliary supply voltage fails or there is aninternal relay fault, the contact gap 71-72 closes

73-74-75 Tripping data of the low-set stage I> of the overcurrent module76-77-78 Tripping data of the two overvoltage stage U> and U>>79-80-81 Tripping data of the reverse power stage P<–82-83-84 Tripping data of the two earth-fault stages I0> and I0>>

61

62

63

64

65

66

67

68

69

70

71

72

13

14

15

1

2

3

4

5

6

7

8

9

25

26

27

83

84

73

74

75

76

77

78

79

80

81

82Mad

e in

Fin

land

Rx

TxTTL

13

14

15

1

2

3

4

5

6

7

8

9

25

26

27

100V

110V

N

5A

1A

N

5A

1A

N

5A

1A

6162

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

~ U aux

N

5A

1A

6

Control signalsbetween themodules

Fig. 4. illustrates schematically how the start-ing, tripping, control and blocking signals can

be programmed to obtain the required functionsof the system.

Fig. 4. Intermodular control signals of the generator protection SPAG 330 C.

45

67

8

I>I>

>

t>t>

>

TS

1T

S2

SGB

SPCJ 3C3 (U2)

23

1

SS

1S

S2

SS

1S

S2

TS

1T

S2

U>

P<

-

(U1)SPCP 3C2

t pt u

U>

>

t>>

X

SS

2T

S1

TS

2

Io>

Io>

>

to>

>

23

45

67

81

SGB

(U3)SPCJ 1C8

IL1,

IL2

BS

3

BS

2

3 127 6 5 48SGR

IL1,

IL2

IL3

U12

F A B C E D

Io

to>

k

SS

1

BS

1

7

The switches of switchgroup SGR, located onthe PCB of the output relay module, are usedfor selecting the function of the control signalsapplied to the output relays A and F by themeasuring modules. The other output relays are

controlled by prewired control signals. The SGRswitches are accessible from the relay front panel.

The function of the different switches is ex-plained in the following tables.

Switch Function Factorysetting

SGR/1 in pos. 1 Routes the tripping signal of the overvoltage stages U> and 1U>> (TS1) to output relay A

SGR/2 in pos. 1 Routes the tripping signal of the reverse power stage P<– (TS2) 1to output relay A

SGR/3 in pos. 1 Routes the tripping signal of the overcurrent stage I> (TS1) 1to output relay A

SGR/4 in pos. 1 Routes the tripping signal of the overcurrent stage I>> (TS2) 1to output relay A

SGR/5 in pos. 1 Routes the tripping signal of the neutral overcurrent stage I0> 1(TS1) to output relay A

SGR/6 in pos. 1 Routes the tripping signal of the neutral overcurrent stage I0>> 1(TS2) to output relay A

SGR/7 in pos. 1 Routes the tripping signal of the neutral overcurrent stage I0> 1(TS1) to output relay F

SGR/8 in pos. 1 Routes the tripping signal of the neutral overcurrent stage I0>> 1( TS2) to output relay F

N.B. The neutral overcurrent module SPCJ 1C8 is not capable of operating unless one of theswitches SGR/5, 6, 7 or 8 is in the position 1.

The PC boards of the overcurrent module SPCJ3C3 and the non-directional earth-fault moduleSPCJ 1C8 hold a switchgroup, SGB, the switchesof which are used for configuring the outgoingand incoming blocking signals of the module.This SGB switchgroup is missing on the PCboards of the overvoltage and reverse power mod-ule SPCP 3C2.


SGB/1 in pos. 1 Routes the starting signal (SS1) of the overcurrent stage I> 0to the blocking line BS2

SGB/2 in pos. 1 Routes the starting signal (SS2) of the overcurrent stage I>> 0to the blocking line BS2

SGB/3 in pos. 1 Routes the starting signal (SS2) of the overcurrent stage I>> 0to the blocking line BS3

SGB/4 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/5 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/6 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/7 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/8 Normally not used in SPAG 330 C. Has to be in the position 0 0

The SGB switches on the PC boards of the over-current module SPCJ 3C3 of the generator pro-tection SPAG 330 C have the following func-tions:

8

The SGB switches on the PC board of the non-directional earth-fault module SPCJ 1C8 havethe following functions:


SGB/1 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/2 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/3 Normally not used in SPAG 330 C. Has to be in the position 0 0SGB/4 in pos. 1 Blocks the tripping of the neutral overcurrent stage I0> 0

when the control signal BS1 is activatedSGB/5 in pos. 1 Blocks the tripping of the neutral overcurrent stage I0>> 0

when the control signal BS1 is activatedSGB/6 in pos. 1 Blocks the tripping of the neutral overcurrent stage I0> 0

when the control signal BS2 is activatedSGB/7 in pos. 1 Blocks the tripping of the neutral overcurrent stage I0>> 0

when the control signal BS2 is activatedSGB/8 in pos. 1 Blocks the tripping of the neutral overcurrent stage I0> 0

when the control signal BS3 is activated

9

Fig. 5. Voltage levels of the power supply module.

1 A slow /4 A slow

+8V

+12V

-12V

+24V

Uaux

80...265 V ac & dc18...80 V dc

Unstabilized logicsvoltage

Operation amplifier voltage

Output relay coilvoltage

Note!Fuse size:1 A for SPGU 240A14 A for SPGU 48B2

To be able to operate the relay needs a securedauxiliary voltage supply. The power supplymodule forms the voltages required by the meas-uring relay modules and the auxiliary relaymodule. The power module is a separate plug-in module located behind the system panel to-gether with the output relay module. The powersupply module can be withdrawn after remov-ing the system panel.

The power supply module is a transformer con-nected, i.e. galvanically isolated primary and sec-ondary side, flyback-type DC/DC converter. Its

primary side is protected with a fuse F1, locatedon the PCB of the module. The fuse size is 1 A/4 A (slow).

The power supply module forms the secondaryvoltages required by the measuring relay mod-ules; i.e. +24 V, ±12 V and +8 V. The outputvoltages ±12 V and +24 V have been stabilizedin the power supply module, while the +5 Vlogic voltage required by the measuring relaymodules is stabilized by the built-in stabilizersof the relay modules.

Power suppIymoduIe

A green LED indicator Uaux on the system panelis lit when the power supply module is opera-tive. The supervision of the voltages supplyingthe electronics is placed in the measuring mod-ules. If a secondary voltage deviates from its ratedvalue by 25%, there will be a contact alarm, i.e.a self-supervision alarm. Alarm is also receivedwhen the power supply module is withdrawnfrom the relay case, or when the auxiliary powersupply to the relay fails.

There are two versions of power supply modulesavailable. The secondary sides are identical in bothtypes, but the input voltage ranges differ.

Insulation test voltage between primary and sec-ondary side and protective earth

2 kV, 50 Hz, 1 minRated power Pn <15 WVoltage ranges of the power supply modules- type SPGU 240A1 Uaux = 80…265 V dc/actype SPGU 48B2 Uaux = 18…80 V dc

The SPGU 240 A1 module can be used for bothac and dc voltages. SPGU 48B2 is designed fordc voltages only. The system panel of the relayindicates the voltage range of the power supplymodule of the relay assembly.

10

Output relaymodule

The output relay module SPTR 7B1 of the gene-rator protection SPAG 330 C is located, to-gether with the power supply module, behindthe system panel fixed by means of cross-slot-

ted screws. The output relay module containsoutput relays and the electronic circuitry of theexternal control inputs. The output relay mod-ule is a separate, withdrawable relay module.

B

70 71 72 64 65 66 67 68 69 73 74 75 76 77 78 79 80 81 82 83 84

FEDCAG

1

1

IRFTS1/U1TS2/U1TS1/U2TS2/U2TS1/U3TS2/U3

SGR/1SGR/2SGR/3SGR/4SGR/5SGR/6

SGR/7SGR/8

SPTR 7B1ENA

Fig. 6. Block diagram for output relay module SPTR 7B1

TS1/U1 Tripping signals of overvoltage stages U> and U>>TS2/U1 Tripping signals of reverse power stage P<–TS1/U2 Tripping signals of overcurrent stage I>TS2/U2 Tripping signals of overcurrent stage I>>TS1/U3 Tripping signals of neutral overcurrent stage I0>TS2/U3 Tripping signals of neutral overcurrent stage I0>>IRF Self-supervision alarm signalENA Enable signal of output relaysSGR Output signal selection switchgroupA Tripping relayB Alarm contact for high-set current stage I>>C Alarm contact for overcurrent stage I>D Alarm contact for overvoltage stages U> and U>>E Alarm contact for reverse power stage P<–F Output contact for earth-fault stages I0> and I0>>G Alarm contact for self-supervision system

When grouping the output signals by means ofthe SGR switchgroup in the output relay mod-ule, it should be noted the signals TS1/U1…TS2/U3 to the output relay module are firmlytied to the module locations. Since the outputsignals have their separate routes from the mod-ule locations to the output relay module, therelay modules must be inserted in the same or-

der as shown in figure on the front page, to en-sure the correct operation of the protection.

N.B. The earth-fault and neutral overcurrentmodule SPCJ 1C8 of the generator protectionSPAG 330 C does not operate unless one of theswitches SGR/5, -6, -7 or -8 is in the position 1.

11

Applicationexamples

Fig. 7. Directly connected solidly earthed generator provided with the generator protection SPAG330 C. The earth-fault protection is carried out as a two-stage protection with both stages tripping.

5 A

1 A

5 A

1 A

5 A

1 A

100

V11

0 V

1 1

IRF

IRF

IRF

U1

U2

U3

I/0

I/0

I/0

U>

U >>

I >

I >>

U5

P <

U6

63 1 2 3 4 5 6 7 8 9 13 141525 2627 61 62

+ -

+ (~)

- (~)Uaux

Rx Tx

SPA-ZC_

70 7172 64 65 66 67 68 69 73 74 75 76 77 78 79 80 81 82 83 84

EDCBAG F

Rx/Tx

1 2 3 4 5 6 7 8 SGR

L1L2L3

U4SPA

G 3

30 C

I >

I >>

5 A

1 A

Output relay functions:

A TrippingB Signalling on tripping of stage I>>B Signalling on tripping of stage I>D Signalling on tripping of stages U> and U>>E Signalling on tripping of stage P<–F Signalling on tripping of stages I0> and I0>>G Self-supervision alarm

12

The tripping signals of all the operating stagesof the relay assembly can be routed to outputrelay A, so this contact is normally used as atripping contact in the various applications. Forthe control of the circuit breaker tripping coil aseparate intermediate relay is required.

The two overvoltage stages, U> and U>>, of theovervoltage and reverse power module U1 (SPCP3C2) have a common output relay D which pro-vides an alarm signal when one of the stages oper-ates. Correspondingly, the two stages, I0> and I0>>,of the non-directional earth-fault module have acommon alarm relay F. The reverse power protec-tion P<– and the two overcurrent stages I> andI>> have their own alarm relays, output relays E,C and B.

Output relay G operates as the self-supervisionalarm relay. It is normally in an operated state whenthe auxiliary voltage is connected to the generator

protection. If the self-supervision system of one ofthe protection modules detects a permanent faultor the power supply fails, output relay G drops off.

The generator protection can be used for both ACand DC auxiliary supply voltage, but to be able toutilize the measured data stored in the memoriesof the modules DC voltage is recommended.

The reverse power stage of the overvoltage andreverse power module U1 (SPCP 3C2) formsthe power of the phase-to-phase voltage of L1and L2 and of the currents of the same phases,see chapter "Connections". The table belowshows how the currents and voltages are con-nected if another phase-to-phase voltage or otherphase currents would be used.

Connection of the currents measured by thereverse power stage and the voltage to the ter-minals of generator protection SPAG 330 C.

Current connections Voltage connection(phase current) (phase-to-phase volt. )

1-2 or 1-3 4-5 or 4-6 13 14 or 15

L1 L2 L2 L1L2 L3 L3 L2L3 L1 L1 L3

The overvoltage protection of the generator canbe implemented as a two-stage protection, sincethe combined overvoltage and reverse power

module U1 has two overvoltage stages, a low-set stage U> and a high-set stage U>>.

13

Fig. 8. Directly connected generator with floating neutral point protected with the generatorprotection SPAG 330 C. The earth-fault protection is carried out as a two-stage protection yet sothat the high-set stage is tripping while the low-set stage is signalling only.

5 A

1 A

5 A

1 A

5 A

1 A

100

V11

0 V

1 1

IRF

IRF

IRF

U1

U2

U3

I/0

I/0

I/0

U>

U >>

I >

I >>

U5

P <

U6

63 1 2 3 4 5 6 7 8 9 13 141525 2627 61 62

+ -

+ (~)

- (~)Uaux

Rx Tx

SPA-ZC_

70 7172 64 65 66 67 68 69 73 74 75 76 77 78 79 80 81 82 83 84

EDCBAG F

Rx/Tx

1 2 3 4 5 6 7 8 SGR

L1L2L3

U4SPA

G 3

30 C

I >

I >>

5 A

1 A

Output relay functions:

A TrippingB Signalling on tripping of stage I>>B Signalling on tripping of stage I>D Signalling on tripping of stages U> and U>>E Signalling on tripping of stage P<–F Signalling on tripping of stages I0> and I0>>G Self-supervision alarm

14

Technical data(modified 2002-04)

Energizing inputsRated current 1 A/5 AThermal current withstand- continuously 4 A/20 A- for 1 s 100 A/500 ADynamic current withstand, half-wave value 250 A/1250 AInput impedance <100 mΩ/<20 mΩRated voltage Un 100 V/110 VContinuous voltage withstand 2 x UnBurden at rated voltage <0.5 VA

Output contact ratingsRated voltage 250 V dc/acContinuous carry 5 AMake and carry for 0.5 s 10 AMake and carry for 3 s 8 ABreaking capacity for dc, whenthe control circuit time-constant L/R <40 ms,at the control voltage levels 48/110/220 V dc 1 A/0.25 A/0.15 A

Contact interval 64-65-66, 67-68-69, 73-74-75,76-77-78, 79-80-81, 82-83-84,70-71-72

Auxiliary power supply moduleType SPGU 240 A1 80…265 V dc/acType SPGU 48 B2 18…80 V dcBurden under quiescent/operating conditions about 10 W/15 W

Overvoltage and reverse power module SPCP 3C2See "Technical data" in the document 1MRS 751156-MUM EN for the module.

Overcurrent relay module SPCJ 3C3See "Technical data" in the document 1MRS 750602-MUM EN for the module.

Non-directional earth-fault relay module SPCJ 1C8See "Technical data" in the document 1MRS 750603-MUM EN for the module.

Data communicationTransmission mode Fibre-optic serial busCoding ASCIIData transfer rate, selectable 300, 1200, 2400, 4800 or 9600 BdOptical bus connection module powered fromthe host relay- for plastic-core cables SPA-ZC 21 BB- for glass-fibre cables SPA-ZC 21 MMOptical bus connection module powered fromthe host relay or from an external power source- for plastic-core cables SPA-ZC 17 BB- for glass-fibre cables SPA-ZC 17 MM

15

Insulation Tests *)Dielectric test IEC 60255-5 2 kV, 50 Hz, 1 minImpulse voltage test IEC 60255-5 5 kV, 1.2/50 µs, 0.5 JInsulation resistance measurement IEC 60255-5 >100 MΩ, 500 Vdc

Electromagnetic Compatibility Tests *)High-frequency (1 MHz) burst disturbance testIEC 60255-22-1- common mode 2.5 kV- differential mode 1.0 kVElectrostatic discharge test IEC 60255-22-2 andIEC 61000-4-2- contact discharge 6 kV- air discharge 8 kVFast transient disturbance test IEC 60255-22-4and IEC 61000-4-4- power supply 4 kV- I/O ports 2 kV

Mechanical environmental testVibration test according IEC 60255-21-1 class 1Chock/bump test according IEC 60255-21-2 class 1

Environmental conditionsSpecified ambient service temperature range -10…+55°C

Temperature influence on the operating values <0.2%/°Cof the relay over the specified ambient servicetemperature range

Long term damp heat withstand according <95% at 40°C for 56 d/ato IEC 60068-2-3

Transport and storage temperature range -40…+70°C

Degree of protection by enclosure when panel mounted IP 54

Mass of the relay 6 kg

*) The tests do not apply to the serial port, which is used exclusively for the bus connection module.

16

Maintenanceand repairs

When the generator protection relay is used un-der the conditions specified in "Technical data",the relay requires practically no maintenance.The generator protection includes no parts orcomponents that are sensitive to physical or elec-trical wear under normal operating conditions.

Should the temperature and humidity at theoperating site differ from the values specified,or the atmosphere contain chemically activegases or dust, the relay should be visually in-spected in association with the secondary test-ing of the relay. This visual inspection shouldfocus on:

- Signs of mechanical damage to relay case andterminals

- Collection of dust inside the relay case; removewith compressed air

- Signs of corrosion on terminals, case or insidethe relay

If the relay malfunctions or the operating val-ues differ from those specified, the relay shouldbe overhauled. Minor measures can be taken bythe customer but any major repair involving theelectronics has to be carried out by the manu-facturer. Please contact the manufacturer or hisnearest representative for further informationabout checking, overhaul and recalibration ofthe relay.

The protection relay contains circuits sensitiveto electrostatic discharge. If you have to with-draw a relay module, ensure that you are at thesame potential as the module, for instance, bytouching the case.

Note!Protective relays are measuring instruments andshould be handled with care and protectedagainst moisture and mechanical stress, espe-cially during transport.

Spare parts Overvoltage and reverse power module SPCP 3C2

Three-phase overcurrent module SPCJ 3C3

Non-directional earth-fault relay module SPCJ 1C8

Power supply module- Uaux = 80…265 V ac/dc SPGU 240 A1- Uaux = 18…80 V dc SPGU 48 B2

Output relay module SPTR 7B1

Input transformer module SPTE 6B7

Bus connection module SPA-ZC 17_ or SPA-ZC 21_

17

Dimensiondrawings andmounting

The basic model of the protection relay case isdesigned for flush-mounting. When required,the mounting depth of the case can be reducedby using raising frames: type SPA-ZX 301 re-duces the depth by 40 mm, type SPA-ZX 302

by 80 mm and type SPA-ZX 303 by 120 mm.When projecting mounting is preferred a relaycase type SPA-ZX 306 is used. The relay casefor projecting mounting is provided with frontconnectors.

Fig. 10. Dimension and mounting drawings for generator protection SPAG 330 C.

Raising frame

SPA-ZX 301SPA-ZX 302SPA-ZX 303

219179139

74114154

a b

226

162

136

229

293259

3034

a b

Panel cut-out

214 ±1

139

±1

The relay case is made of profile aluminium andfinished in beige.

The rubber gasket fitted to the mounting collarprovides an IP54 degree of protection by enclo-sure between the relay case and the mountingbase.

The hinged cover of the case is made of trans-parent, UV-stabilized polycarbonate polymerand provided with two sealable locking screws.The rubber gasket of the cover provides an IP54degree of protection between the case and thecover.

The required input and output connections aremade to the multi-pole terminal blocks on therear panel. Each screw terminal is dimensionedfor one or two wires of maximum 2.5 mm2. Aconnection diagram adjacent to the terminalblocks illustrates the connection of the termi-nals.

The bus connection modules (SPA-ZC 17_ orSPA-ZC 21_) and fibre-optic cables recom-mended by the manufacturer should always beused for the serial communication.

IRF

>U

I PU

666B

[ ]sut0.6

0.1 1.0

10

2.0

6.0

1.0 12

0.8

1.2

1.6

STEP

RESET

SG1

0 1

12345678

P

nU>U

t [ ]s

<P

SPCP 3C2

nPP

20

p

[ ]%

>U>>U

STEP

SPCP 3C2Overvoltage and reverse power module


2

Contents Features .......................................................................................................................... 2Description of function .................................................................................................. 2Block diagram (modified 2003-01).................................................................................. 3Front plate ...................................................................................................................... 4Operation indicators ....................................................................................................... 4Settings ........................................................................................................................... 5Programming switches (modified 2003-01) ..................................................................... 5Measured data................................................................................................................. 6Recorded information ..................................................................................................... 7Main menus and submenus ............................................................................................ 8Technical data (modified 2003-01) .................................................................................. 9Event codes ................................................................................................................... 10Remote transfer data (modified 2003-01) ...................................................................... 11

Features The overvoltage and reverse power module con-tains:- a two-stage overvoltage protection stage- a reverse power protection stage

The display unit presents measured and set val-ues and displays the information recorded dur-ing a fault

Records the maximum voltage and reversepower, the number of startings of the differentprotective stages and the duration of the lateststarting situation of the overvoltage stage

The self-supervision system continuously super-vises the function of the electronics and themicroprocessor and, if a permanent fault is de-tected, it provides a control signal to the alarmoutput relay and blocks the other outputs


The overvoltage protection stage includes twooperating stages, U> and U>>. The startingvalue and the operating time tu of the U> stageare selected by means of the setting knobs onthe front plate. The SG1/1 switch is used forselecting the setting range, 0.1…1 s or 1…10 s,of the operating time tu. The starting value andthe operating time, each with four alternativesettings, are selected with the switches SG1/3,4 and SG1/5, 6 respectively.

The overvoltage stages share the output signalsSS1 and TS1. Starting of one of the overvoltagestages provides a starting signal SS1. If theovervoltage situation lasts long enough to ex-ceed the set operating time, a tripping signalTS1 will be provided by the overvoltage stagethat started.

The reverse power stage P<– measures the sin-gle phase power between the generator and thepower network by means of the phase currentsIL1 and IL2 and the phase-to-phase voltage U12.The current information is formed as the sumof the phase currents. A table presented in thegeneral description of the relay unit shows howthe currents measured by the reverse power stageand the voltage are to be connected to the relay.

The reverse power stage starts and provides astarting signal SS2 when the direction of theactive power flow shifts from the network to-wards the generator. When the set operatingtime tp has elapsed, the stage delivers a trippingsignal TS2. The setting range of the operatingtime, 1…10 s or 10…100 s, is selected by meansof the SG1/8 switch.

SPCP 3C2Overvoltage and

reverse power module

1MRS 751156-MUM EN

Issued 1998-11-27Modified 2003-03-19Version B (replaces 34 SPCP 2 EN1)Checked PSApproved MÖ


3

Block diagram(modified 2003-01)

Fig. 1. Block diagram of the overvoltage and reverse power module SPCP 3C2.

IL1, IL2 Phase currentsU12 Phase-to-phase voltageSS1 Starting signal of the U>- and U>>-stageTS1 Tripping signal of the U>- and U>>-stageSS1 Starting signal of the P<– -stageTS2 Tripping signal of the P<– -stage

NOTE!All the input and output signals of the moduleare not necessarily wired down to the termi-nals of each relay unit utilizing this module.

The signals to be wired to the terminals of therelay unit are shown in the connection diagramof the relay unit.

SS1

TS1

SS2

TS2

SPCP 3C2

U>

U>>

SG1/2SG1/3SG1/4

SG1/1

SG1/5SG1/6

SG1/8

100 ms

100 ms

200 ms

tu

t>>

tp

UL1L2

–IL1

IL2

1

1

X∑

P<–

SPCP3C2_BLOCK.fh7

4

Front plate

IRF

>U

I PU

666B

[ ]sut0.6

0.1 1.0

10

2.0

6.0

1.0 12

0.8

1.2

1.6

STEP

RESET

SG1

0 1

12345678

P

nU>U

t [ ]s

<P

SPCP 3C2

nPP

20

p

[ ]%

>U>>U

STEP

Indicators for the voltage (U), current (I)and power (P) to be measured

Indicator and setting knob for thestarting value of the overvoltage stage U>

Indicator and setting knob for theoperating time of the overvoltage stage U>

Indicator and setting knob for startingvalue of the reverse power stage

Indicator and setting knob for theoperating time of the reverse power stage

Simplified device symbol

Indicator for the self-supervision system

Display

Step push-button forthe display

Program selectorswitchgroup

Switchgroup indicator

Reset push-button

Operation indicatorsType designation forthe module

Fig. 2. Front plate of the overvoltage and reverse power module SPCP 3C2.

Operationindicators

The overvoltage stages (U>, U>>) have a com-mon yellow/red operation indicator and the re-verse power stage (P<–) has its own one. Yellowlight indicates starting of the concerned operat-ing stage, whereas red light indicates that thestage has delivered a tripping signal.

The yellow operation indicator goes out whenthe operating stage resets. The red operationindicator remains lit although the operatingstage resets, thus indicating which protectionstage was operating. The red operation indica-tor is reset by pressing the push-button RESET.The operation of the relay module is not af-fected by an operation indicator being unreset.

The self-supervision indicator indicates that theself-supervision system has detected a perma-nent fault. The indicator is lit with a red lightabout 1.5 minute after the fault has been de-tected. At the same time the relay module de-livers a control signal to the self-supervisionoutput relay of the protection unit. Further, inmost fault situations, a fault code showing thetype of fault appears on the display of the mod-ule. The fault code, which consists of a red digitand a green code number, cannot be erased fromthe display of the module by resetting. The faultcode should always be recorded and stated whenordering service.

5

Settings The setting values are displayed by the threerightmost digits of the display. The indicator right

under a setting knob shows, when glowing, whichvalue is being displayed at the moment.

U>/ Un The starting value of the overvoltage stage U> as a multiple of the rated voltageof the relay. Setting range 0.80…1.60 x Un.

tu The operating time of the overvoltage stage U> expressed in seconds.Setting range 0.10…1.00 s or 1.00…10.0 s.

P<–/Pn The starting value of the reverse power stage expressed of the relay rated power.A red minus sign in front of the first digit indicates that the displayed value isa reverse power value. Setting range -2.0…-20.0%.

tp The operating time of the reverse power stage expressed in seconds.Setting range 1.00…10.0 s (SG1/8 = 0) or 10.0…100 s (SG1/8 = 1).

The starting value and the operating time ofthe overvoltage stage U>> are selected by meansof the programming switches of switchgroupSG1. The setting values are presented below inthe section "Programming switches".

Further, the checksum of the programmingswitchgroup SG1 is presented on the displaywhen the indicator under the switchgroup is lit.In this way it can be checked that the switcheshave been set and that they work properly. Anexample of calculating the checksum is given inthe description "General characteristics of C-type relay modules".

Programmingswitches(modified 2003-01)

Additional relay functions required by indi-vidual applications are selected by means of theprogramming switches of switchgroup SG1. The

numbering of the switches, 1…8, and the switchpositions, 0 and 1, are marked on the frontpanel.

Switch Function

SG1/1 Selection of the multiplier of the operating time of the overvoltage stage U>.

When SG1/1 = 0, the setting range of the operating time tu of the overvoltagestage U> is 0.1…1 s.When SG1/1 = 1, the setting range of the operating time tu of the overvoltagestage U> is 1…10 s.

SG1/2 Note! With software SW 028A was the switch SG1 not in use and the positionhas to be 0.

SG1/3 Setting of the starting value of the overvoltage stage U>>, as a multiple of theSG1/4 rated voltage of the relay.

SG1/2 SG1/3 SG1/4 U>> [xUn]

1 0 0 1.051 1 0 1.101 0 1 1.151 1 1 1.200 0 0 1.300 1 0 1.400 0 1 1.500 1 1 1.60

6

Switch Function

SG1/5 Setting of the operating time of the overvoltage stage U>> expressed in secondsSG1/6

SG1/5 SG1/6 t>>/s

0 0 0.11 0 0.30 1 0.61 1 1.0

SG1/7 Not in use. Has to be in the position 0.

SG1/8 Selection of the setting range for the operating time of the reverse power stage.

When SG1/8 = 0, the setting range of the operating time tp of the reverse powerstage is 1…10 s.When SG1/8 = 1, the setting range of the operating time tp of the reverse powerstage is 10…100 s.

Measured data The measured information is displayed by thethree rightmost digits of the display. The infor-

mation being displayed is indicated by a lit in-dicator.

Indicator Measured data

U The voltage measured by the module expressed as a multiple of the relay ratedvoltage Un.

I The current measured by the module expressed as a multiple of the relay ratedcurrent In. The module measures currents within the range 0…1.3 x In.

P The active power measured by the module expressed in per cent (%) of the relayrated power). The module measures the active power within the range 25.0…-25.0%.If the direction of the power flow is from the grid towards the generator (reversepower), a red minus sign is glowing in the first digit window from the left. If thepower measured by the unit exceeds 25% of the rated power, the display shows --- or---- depending on the direction of the power.

7

Recordedinformation

The leftmost digit displays the register addressand the other three digits the recorded infor-mation.

Register/ Recorded informationSTEP

1 The maximum voltage measured after the latest resetting of the register, as a multipleof the rated voltage of the relay. If one of the overvoltage stages starts and performstripping, the maximum voltage level measured between starting and tripping isdisplayed by the register.

2 Number of startings of the overvoltage stage U>, n (U>) = 0…255.

3 Number of startings of the overvoltage stage U>>, n (U>>) = 0…255.

4 The duration of the latest starting situation of the overvoltage stage, expressed as apercentage of the set operating time tu. A new start resets the counter which startsrecounting from zero. If the stage has tripped, the counter reading will be 100.

5 The maximum reverse power measured after the latest resetting of the register,expressed as a percentage of the rated active power measured by the relay. If thereverse power exceeds 25% of the rated power, the register reading will be 5---.

6 Number of starting of the reverse power stage n (P<-) = 0…255.

0 The center digit and the rightmost digit are always zero. The leftmost digit indi-cates the state of the remote reset input, if any. The following states are indicated:0 = remote reset control input not energized1 = remote reset control input energized

From this register it is possible to move on to the TEST mode, where the startingand tripping signals of the module can be activated one by one. For further details,see the description "General characteristics of C-type relay modules".

A Address code of the measuring relay module, required by the serial communicationsystem. The address code is set at zero, unless the serial communication system isused. The subroutines of this register are the selection of the baud rate of the serialcommunication, the bus traffic monitor supervising the operating state of the serialcommunication bus and the password required for the remote control of the set-tings. If the unit is connected to a control data communicator, the bus traffic moni-tor is at zero. Otherwise the digits 0…255 are continuously scrolling in the counter.

The registers 1…6 are set to zero by pressing thepush-buttons STEP and RESET simultaneously.The registers are also cleared by an interruptionof the auxiliary power supply. The address codeof the relay module, the data transfer rate and

the password are stored in a non-volatile memory.The instructions for setting the address and thebaud rate are given in the description "Generalcharacteristics of C-type relay modules".

8

Main menus andsubmenus

1

2

3

4

5

6

0 0 000TS2SS1 TS1 SS2

21 222 323A

111

111

111

111

111 22

222

222

222

222

Triptest

Display switched off. State automatically reached after 5 min. time-out

Measured voltage

Measured current

Measured active power

Set starting value U>of stage U>

Set operating time tuof stage U>

Set starting value P<–of stage P<–

Set operating time tpof stage P<–

Checksum of switchgroupSG1

= value to be set in the setting mode

Remotely setpercentage p4

Remotely setchecksum




Remote settingvalue U> x p1

Remote settingvalue tu x p2

Remote settingvalue P<– x p3

Remote settingvalue tp x p4

Remotely setchecksum

Max. recorded voltage value

Number of startings of stage U>

Number of startings of stage U>>

Duration of the latest starting of stage U>

Max. recorded reverse power value

Number of starts of the reverse power stage P<–

Incomingblockings

Module addresscode

Data transferrate (Bd)

Bus trafic super-vision counter (s)

Password forremote setting

9

Technical data(modified 2003-01)

Overvoltage stage U>Setting range 0.80…1.60 x UnStarting time ≤100 msOperating time 0.10…1.00 s or 1.00…10.0 sResetting time ≤80 msDrop-off/pick-up ratio ≥0.96Setting accuracy ±1%Accuracy of the operating time ±2% or +25 msOperation accuracy ±3% of set value

Overvoltage stage U>>Settings 1.05 x Un, 1.10 x Un, 1.15 x Un, 1.20 x Un,

1.30 x Un, 1.40 x Un, 1.50 x Un, 1.60 x UnStarting time ≤100 msOperating time 0.1 s, 0.3 s, 0.6 s or 1.0 sResetting time ≤80 msDrop-off/pick-up ratio ≥0.96Setting accuracy ±1%Accuracy of the operating time ±2% or +25 msOperation accuracy ±3% of set value

Reverse power stageSetting range -2.0…-20.0%Starting time <200 msOperating time 1.00…10.0 s or 10.0…100 sResetting time ≤200 msDrop-off/pick-up ratio when- the setting P<-/Pn <5 % ≥0.85- the setting P<-/Pn ≥5 % ≥0.96Setting accuracy ±1%Accuracy of the operating time ±2% or ±40 msOperation accuracy ±5% of the maximum value of

the setting range when I ≤In

10

Event codes Over the SPA bus the station level control datacommunicator can read the event data, e.g. start-ing and tripping, from the overvoltage and re-verse power module SPCP 3C2. On request themodule prints out its event data in the formattime (ss.sss) and the event code. The event codesof the module are E1…E8 and E50 and E51.In addition, the station level control datacommunicator can form event codes related toe.g. the data communications.

The codes E1…E8 and the events representedby these can be included in or excluded fromthe event reporting by writing, over the SPA bus,an event mask (V155 ) to the module. The eventmask is a binary number transformed to a deci-mal number. Each event code, E1…E8, is rep-

resented by a number, 1, 2, 4…128. The eventmask is obtained by multiplying these numbersby 0 (event not included) or by 1 (event in-cluded) and adding the numbers received (com-pare checksum calculation).

The event mask may take a value between 0 and255. The event mask of the overvoltage and re-verse power module SPCP 3C2 is 85, whichmeans that start and trip data, but not reset data,are transmitted to the control data communi-cation on request. The codes E50…E54 and theevents represented by these cannot be excludedfrom the event reporting.

The event codes of the overvoltage and reversepower module SPCP 3C2 are as follows:

Code Event Number Defaultrepresenting value ofthe event the factor

E1 Overvoltage stage U> or U>> started 1 1E2 Starting of overvoltage stage U> or U>> reset 2 0E3 Overvoltage stage U> or U>> tripped 4 1E4 Tripping of overvoltage stage U> or U>> reset 8 0E5 Reverse power stage started 16 1E6 Starting of reverse power stage reset 32 0E7 Reverse power stage tripped 64 1E8 Tripping of reverse power stage reset 128 0

E50 Restarting * -E51 Overflow of event register * -E52 Temporary disturbance in data communication * -E53 No response from the module over the data communication * -E54 The module responds again over the data communication * -

0 = not included in the event reporting1 = included in the event reporting* = no code number- = cannot be programmed

NOTE!In the SPACOM system the event codes E52…E54 are formed by the station level control datacommunicator.

11

Remotetransfer data(modified 2003-01)

In addition to the event codes the station levelcontrol data communicator is able to read, overthe SPA bus, all the input data (I-data), settingvalues (S-data), memorized data (V-data) and

some other data of the overvoltage and reversepower module. Part of the data can be alteredby commands given over the SPA bus. All thedata are in channel 0.

Data Code Data Valuesdirect.

Measured voltage U I1 R 0…2.55 x UnMeasured current I I2 R 0…1.30 x InMeasured active power P I3 R -25.0…+25.0 % x Pn

-999, if reverse power >25%

Starting of overvoltage stage U> or U>> O1 R 0 = not started1 = started

Tripping of overvoltage stage U> or U>> O2 R 0 = not tripped1 = tripped

Starting of reverse power stage O3 R 0 = P<- stage not started1 = P<- stage started

Tripping of reverse power stage O4 R 0 = P<- stage not tripped1 = P<- stage tripped

Actual starting value of stage U> S1 R 0.8…1.6 x UnActual operating time tu of stage U> S2 R 0.10…10.0 sActual starting value of stage P<– S3 R -2.00…-25.0% x PnActual operating time tp of stage P<– S4 R 1.00…100 sActual checksum of switchgroup SG1 S5 R 0…255

Starting value of stage U>, S11 R 0.8…1.6 x Unset with the setting knobOperating time of stage U>, S12 R 0.10…10.0 sset with the setting knobStarting value of stage P<–, S13 R -2.00…-25.0% x Pnset with the setting knobOperating time of stage P<–, S14 R 1.00…100 sset with the setting knobChecksum of switchgroup SG1 S15 R 0…255(set with the switches)

Remote setting percentage S21 R, W 0…999%of the starting value of stage U>Remote setting percentage S22 R, W 0…999%of the operating time of stage U>Remote setting percentage S23 R, W 0…999%of the starting value of stage P<-Remote setting percentage S24 R, W 0…999%of the operating time of stage P<-Remotely set checksum S25 R, W 0…255of switchgroup SG1

Actual remote setting of S31 R 0.8…1.6 x Unstarting value of stage U>Actual remote setting of S32 R 0.10…10.0 soperating time of stage U>Actual remote setting of S33 R -2.00…-25.0% x Pnstarting value of stage P<–Actual remote setting of S34 R 1.00…100 soperating time of stage P<–Actual remotely set checksum S35 R 0…255of switchgroup SG1

12


Maximum voltage measured V1 R 0…2.55 x Unafter resettingNumber of startings of stage U> V2 R 0…255Number of startings of stage U>> V3 R 0…255Duration of the latest starting V4 R 0…100%situation of stage U>Maximum reverse power measured V5 R 0.00…-25.0% x Pnafter resetting -999, if reverse power >25%Number of startings of stage P<- V6 R 0…255

Resetting of memorized data V102 W 1 = registers V1…V6 are reset

Remote control of settings V150 R, W 0 = setting with knobsS11…S15 activated

1 = remote settingsS31…S35 activated

Event mask word V155 R, W 0...255, see section"Event codes"

Opening of password for remote settings V160 W 1…999Changing or closing the passwordfor remote settings V161 W 0…999

Activation of self-supervision input V165 W 1 = self-supervision input isactivated and IRF indicatorlit in about 10 seconds,in further 30 seconds theself-supervision input resets

Data communication address V200 W 1…254of the module

Programme version symbol V205 R e.g. 028B

Reading of event register L R Time, channel numberand event code

Re-reading of event register B R Time, channel numberand event code

Type designation of the module F R SPCP 3C2

Reading of module state data C R 0 = normal state1 = module been subject to

automatic reset2 = event register overflow3 = events 1 and 2 together

Resetting of module state data C W 0 = resetting

Time reading and setting T R, W 00.000…59.999 s

R = data to be read from the moduleW = data to be written from the module

13

The data transfer codes L, B, C and T are usedfor the communication between the module andthe station level control data communicator. Theevent register can be read once only by meansof the L-command. Should there be a fault, forinstance in the data communication, the eventregister contents read once by means of the L-command can be read again by using the B-command. The B-command can be repeatedwhenever necessary.

The setting values S1…S5 are used by the pro-tection programs. These values are set eitherremotely or by means of the setting knobs. Thevalues S11…S15 are set with the setting knobsor the switches. S21…S25, which allow read-ing or writing, are remotely set percentage fac-tors for the setting knob settings. To be able to

write, a password for remote setting (V160) hasto be opened. The variables S31…S35 includethe actual remote setting values.

The remote setting percentages S21…S24 arechanged by writing a percentage factor in therange 0…999 for these variables. Then it willalso be possible to select a setting value beyondthe limits specified in the technical data of themodule. However, the accuracy of the settingvalues will be guaranteed only within the rangespecified in the technical specifications.

Activation of the self-supervision input (V165)prevents the protection from operating whenthe self-supervision input is activated and theIRF indicator is lit.

L1 IRF

>I

L2I L3II

1309

[ ]sk

>t0.5

0.05 1.0

13

2.5

0.5

0.04 1.0

0.5

1.5

2.5

STEP

RESET

SG1

0 1

1234567820

STEP

>>I

nI>I

nI>>I

>>t [ ]s

>I >>I

SPCJ 3C3

B

SPCJ 3C3Overcurrent relay module


2

SPCJ 3C3Overcurrent

relay module

Contents Features .......................................................................................................................... 2Description of operation ................................................................................................. 3Block diagram................................................................................................................. 4Front panel ..................................................................................................................... 5Operation indicators ....................................................................................................... 5Settings ........................................................................................................................... 6Selector switches ............................................................................................................. 7Measured data ................................................................................................................ 9Recorded information ................................................................................................... 10Main menus and submenus of settings and registers ..................................................... 12Time/current characteristics (modified 2002-05) .......................................................... 13Technical data .............................................................................................................. 18Event codes ................................................................................................................... 19Remote transfer data ..................................................................................................... 20Fault codes .................................................................................................................... 23

Features Low-set overcurrent stage I> with selectabledefinite time or inverse definite minimum time(IDMT) operation characteristic

High-set current stage I>> with instantaneousoperation or definite time operation character-istic

Both overcurrent stages can be blocked by meansof an external control signals from cooperatingprotection relays

Digital display of measured and set values, re-corded fault values, operation indications andfault messages

Comprehensive serial communication capability

Continuous self-supervision of the electronicsand the software including autodiagnostics

1MRS 750602-MUM EN

Issued 1996-12-30Modified 2002-05-15Version D (replaces 34 SPCJ 2 EN1)Checked MKApproved OL


3

The overcurrent relay module SPCJ 3C3 can beused in single-phase, two-phase or three-phaseprotection relays and it contains two overcur-rent stages, i.e. a low-set overcurrent stage I>and a high-set overcurrent stage I>>.

The low-set or high-set overcurrent stage startsif the current on one of the protected phasesexceeds the set start value of the concerned stage.On starting, the concerned stage provides astarting signal SS1 or SS2 and simultaneouslythe operation indicator of the stage is lit withyellow light. If the overcurrent situation lastslong enough to exceed the set operation delay,the stage that started provides a tripping signal,TS1 or TS2. At the same time the operationindicator of the concerned stage is lit with redlight. The red operation indicator remains litalthough the protection stage resets. The yellowstart indications and the red operation indica-tions can be given self-reset or latching mode ofoperation. When the latching mode is selectedthe indicators are restet with the RESET push-button on the module's front panel or by thecommand V101 or V102 over the serial inter-face.

The operation of the low-set overcurrent stageI> can be blocked by routing a blocking signalBTS1 to the stage. Similarly, the operation ofthe high-set overcurrent stage I>> can be blockedby a blocking signal BTS2. The blockings areselected by means of switchgroup SGB on thePC board of the relay module.

If the protection relay incorporates an auto-reclose relay module, switchgroup SGB is addi-tionally used for the purpose of selecting thestart signals for the auto-reclose module. Theinstructions for selector switchgroup SGB aregiven in the general description of the pro-tection relay unit, in association with the dia-gram illustrating the signals between the relaymodules.

The operation of the low-set overcurrent stageI> can be based on definite time or inversedefinite minimum time (IDMT) characteristic.The required operation characteristic is selected

with switch SG1/3. At definite time character-istic the operation time t> can be selected withinone of the three available setting ranges of thestage. The operation time setting range is se-lected with switches SG1/1 and SG1/2. Wheninverse time characteristic (IDMT) is used fourtime/current curve groups with different slopesof inversity are available. The required charac-teristic is selected with switches SG1/1 andSG1/2.

The operation time t>> of the high-set overcur-rent stage is set separately. The setting range,one of three available, is selected by means ofswitches SG1/7 and SG1/8.

Normally both overcurrent stages are self-reset.With the selector switch SG1/4 both stages canbe given a so called latching function, whichmeans that the tripping output is kept energizedafter an operation though the fault has disap-peared, until separately reset. The outputs arereset by pressing the push-buttons STEP andRESET simultaneously or by the commandsV101 or V102 over the serial interface. See alsotable (switchgroup SG3) on page 9 in chapter"Selector switches".

The set start value of the high-set overcurrentstage I>> may be automatically doubled when theprotected object is energized, i.e. during a currentinrush situation. Thus the set start value of thehigh-set overcurrent stage can be lower than theconnection inrush current. The automatic dou-bling feature is selected with switch SG1/5. Astarting situation is defined as a situation wherethe phase currents increase from a value below0.12 x I> to a value exceeding 3.0 x I> in less than60 ms. The starting situation ceases when thephase currents fall below 2.0 x I>.

The setting range of the high-set overcurrentstage is selected with switch SG1/6. Two alter-natives setting ranges are available, 2.5...20 x Inand 0.5...4.0 x In. When the lower range ischosen the relay module will contain two almostidentical operation stages. In this case the over-current module SPCJ 3C3 may be used e.g. as atwo-stage load shedding module. The operationof the high-set overcurrent stage may be blockedby choosing the setting value ∞, infinite.

Description ofoperation

4

Block diagram

Fig. 1. Block diagram for the overcurrent relay module SPCJ 3C3.

IL1, IL2, IL3 Measured phase currentsBS1, BS2, BS3 External blocking signalsBTS1 Blocking signal for the tripping of stage I>BTS2 Blocking signal for the tripping of stage I>>SG1 Selector switchgroup on the front panelSG2 Function selector switchgroup for the operation indicatorsSGB Blocking signal selector switchgroup on the PC board and

starting signal selector switchgroup for the auto-reclose functionsSS1 Start signal of stage I>TS1 Trip signal of stage I>SS2 Start signal of stage I>>TS2 Trip signal of stage I>>AR1, AR2 Start signals for auto-reclose functionsY Yellow indicator, startingR Red indicator, tripping

NOTE!All input and output signals of the relay moduleare not necessarily wired to the terminals of anyprotection relay incorporating this module. Thesignals wired to the terminals are shown in the

diagram illustrating the interchange of signalsbetween the various modules of the protectionrelay.

5

Front panel


Self-supervision systemalarm indicator

Display for set andmeasured values

Display step push-button

Selector switchgroup SG1

Indicator for switchgroupSG1, SG2 and SG3

Reset push-button

Start and operationindicatorsRelay module typedesignation

L1 IRF

>I

L2I L3II

1309

[ ]sk

>t0.5

0.05 1.0

13

2.5

0.5

0.04 1.0

0.5

1.5

2.5

STEP

RESET

SG1

0 1

1234567820

STEP

>>I

nI>I

nI>>I

>>t [ ]s

>I >>I

SPCJ 3C3

B

Current measurement indicatorsfor phases L1, L2, L3

Indicator and start value settingknop of overcurrent stage I>

Indicator and operation time ortime multiplier k setting knob ofovercurrent stage I>

Indicator and start value settingknop of overcurrent stage I>>

Indicator and operation timesetting knop of overcurrentstage I>>

Fig. 2. Front panel of the overcurrent relay module SPCJ 3C3.

Operationindicators

Both overcurrent stages are provided with ayellow/red indicator. Yellow light indicates start-ing of the concerned overcurrent stage and redlight indicates that the overcurrent stage hasoperated (tripped).

The four indications, two starts and two trip-pings, can be given a self-reset mode of opersa-tion or manual reset mode. If, for instance, theyellow start indicator of the low-set overcurrentstage I> has been given the manual reset mode,the indicator is lit with yellow colour when theovercurrent stage starts and turning red whenthe stage operates. When the protection stagereturns to normal the yellow indication remainslit. The indicators that have been given themanual reset mode are reset by pushing theRESET push-button or by the command V101or V102 via the serial interface. The function ofthe relay module is not affected by an unresetoperation indicator.

When the display of the relay module is darkand one of the protection stages operates, the

indicators for the measured values of the moduleindicate the faulty phase, i.e. in which phase(s)the current has exceeded the setting value of thestage (so called phase fault indication). If, forinstance, the operation indicator of stage I> is litwith red light and the indicators IL1 and IL2 alsoare lit, the relay operation was caused by over-current on phases L1 and L2. The phase faultindications are reset by pushing the STEP push-button or the RESET push-button. See alsotable (switchgroup SG3) on page 9 in chapter"Selector switches".

The self-supervision alarm indicator IRF indi-cates that the self-supervision system has de-tected a permanent fault. The indicator is litwith red light shortly after a permanent internalfault has been detected. At the same time acontrol signal is put forward to the output relayof the self-supervision system. Additionally, inmost fault cases, a fault code indicating type offault appears on the display of the relay module.The fault code is to be recorded to serve thesubsequent fault location and repair actions.

6

The setting values are shown by the threerightmost digits of the display. When lit, the

indicator below a setting knob shows that theconcerned setting value is being displayed.

I>/In Set start current of stage I> as a multiple of the rated current In of the energizing inputused. Setting range 0.5...2.5 x In.

t> [s] The set start time of stage I>, expressed in seconds, when the definite time characteristick is used (SG1/3 = 0). The setting range is determined by the position of switches SG1/1

and SG1/2. Selectable setting ranges 0.05...1.00 s, 0.5...10.0 s and 5...100 s.

At inverse definite minimum time characteristic (SG1/3 = 1) the setting range of timemultiplier k is 0.05...1.00.

I>>/In Set starting current of stage I>> as a multiple of the rated current In of the energizing inputused. Setting range 2.5...20.0 x In, when SG1/6 = 0, and 0.5...4.0 x In, when SG1/6 = 1.Additionally, the setting infinite (displayed as - - -) can be selected, rendering the high-set stage I>> inoperative.

t>> [s] The set operation time of stage I>>, expressed in seconds. The setting ranges, 0.04...1.00 s,0.4...10.0 s and 4...100 s, are determined by the position of switches SG1/7 and SG1/8, seebelow.

Settings

Further, the checksum of the selector switch-group SG1 is indicated on the display when theindicator under the switchgroup is glowing. Inthis way a checked can be carried out to provethat the switches have been set and that the

switches themselves work properly. An exampleof calculating the checksum is given in thedescription "General characteristics of C-typerelay modules".

7

Selector switches Additional functions required by individual ap-plications are selected by means of the selectorswitches of switchgroup SG1 located on the

front panel. The numbering of the switches1...8, as well as the switch positions 0 and 1 aremarked on the front panel.

Switch Function

SG1/1 Switch SG1/3 is used for choosing the operation characteristic of the low-set currentSG1/2 stage I>, i.e. definite time or inverse definite minimum time (IDMT) characteristic.SG1/3 At definite time mode characteristic the setting range of the operation time t> is

selected by means of switches SG1/1 and SG1/2, whereas, at inverse definite minimumtime characteristic the switches are used for choosing the current/time characteristicof the overcurrent stage.

SG1/1 SG1/2 SG1/3 Characteristic Operation time t> ortype of characteristic

0 0 0 Definite time 0.05...1.00 s1 0 0 " 0.5...10.0 s0 1 0 " 0.5...10.0 s1 1 0 " 5...100 s

0 0 1 IDMT Extremely inverse1 0 1 " Very inverse0 1 1 " Normal inverse1 1 1 " Long-time inverse

SG1/4 Selection of the latching function for the tripping signals TS1 and TS2.

When SG1/4 = 0, the tripping signals return to normal (= the output relay resets, whenthe energizing input signal causing the operation falls below the start level.When SG1/4 = 1, the tripping signals remain on (= output relay energized), althoughthe energizing input signal falls below the starting level. The latched tripping signalsare reset by pressing the push-buttons STEP and RESET simultaneously or with thecommand V101. When the STEP and RESET push-buttons are pushed the recordedvalues are erased as well. *)

SG1/5 Selection of automatic doubling of the setting value of the high-set overcurrent stagewhen the protected object is connected to the network.

When SG1/5 = 0, no doubling of the set start value of stage I>> is obtained.When SG1/5 = 1, the set start value of stage I>> doubles automatically. The doublingfeature makes it possible to give the high-set current stage a setting value, which islower than the connection inrush current of the protected object.

SG1/6 Selection of the start current setting range of the high-set overcurrent stage I>>.

When SG1/6 = 0, the setting range is 2.5...20 x In and ∞, infinite.When SG1/6 = 1, the setting range is 0.5...4 x In and ∞, infinite.When SG1/6 =1, the module comprises two almost identical overcurrent stages andmay in this case be used for load shedding purposes. The setting ∞, infinite, isindicated by - - - on the display.

*) From the program version 052 C and later an additional switchgroup (SG3) has been incorpratedinto the relay module. When the latching function is used the latched output can be resetby pushing the RESET button alone, if SG3/3=1, or by pushing the STEP button alone, ifSG3/2=1, in which case the stored information of the module is not erased.

8

Switch Function

SG1/7 Selection of the setting range of the operation time t>> of the high-set overcurrentSG1/8 stage I>>.

SG1/7 SG1/8 Operation time t>>

0 0 0.04...1.00 s1 0 0.4...10.0 s0 1 0.4...10.0 s1 1 4...100 s

Switchgroup SG2 is a so called software switch-group, which is located in the third submenu ofswitchgroup SG1. In switchgroup SG2 the modeof operation of the LED indicators is selected.The start and operation indicators of the low-setand the high-set overcurrent stage can be givenself-reset mode of operation or latching mode ofoperation. The selection is made by means of a

checksum which is calculated from the tablebelow. Normally the start indications are self-reset and the operation indications latching.

If the checksum of switchgroup SG2 = 0 noLED indications are obtained after a fault, i.e.no start or operation indications I> or I>> norphase indications IL1, IL2 or IL3.

Indication Latching Default

Starting, stage I>, yellow 1 0Tripping, stage I>, red 2 2Starting, stage I>>, yellow 4 0Tripping, stage I>>, red 8 8

Checksum 15 10

9

Switchgroup SG3 is a so called software switch-group, which is located in the fourth submenuof switchgroup SG1. The front panel push-

buttons STEP and RESET can be programmedwith switches SG3/1…3. Switches SG3/4…8are not in use. The default value for SG3 is 0.

SG3/1 SG3/2 SG3/3 Push-button Clear Reset Erasestart/trip latched memorizedLED's relays values

STEP0 0 0 RESET x

STEP & RESET x x x

STEP x1 0 0 RESET x

STEP & RESET x x x

STEP x x0 1 0 RESET x

STEP & RESET x x x

STEP0 0 1 RESET x x

STEP & RESET x x x

STEP x1 0 1 RESET x x

STEP & RESET x x x

The PC board of the relay module holds aswitchgroup SGB including switches 1...8.Switches 1...3 are used for selecting the startingsignals for a possible auto-reclose module,whereas switches 4...8 are used for routing

blocking signals to the overcurrent module invarious protection relays. The functions of theselector switchgroup SGB is described in thegeneral part of the manual of the concernedprotection relay.

Measured data The measured values are displayed by therightmost three digits on the display. The rele-

vant measured data are indicated by a lit indica-tor on the front panel.

Indicator Measured data

IL1 Line current on phase L1 as a multiple of the rated current In.



NOTE! The rated current In is the rated current of the energizing input taken in use in the concernedprotection relay.

10

Recordedinformation

The leftmost digit of the display shows theaddress of the register and the three rightmost

digits the recorded information. The addressdigit is recognized by its red colour.


1 Maximum phase current measured as a multiple of the rated current of the protectionrelay. If the module operates, the current value at the moment of operation is storedin the memory. A new tripping erases the old value and updates the register with thenew value. The same thing happens if the current exceeds a previously registeredmaximum value.

In the 1.st submenu the current value measured at the last operation is recorded.

2 Number of startings of the low-set overcurrent stage I>, n (I>) = 0...255.

3 Number of startings of the high-set overcurrent stage I>>, n (I>>) = 0...255.

4 Duration of the latest starting situation of stage I> as a percentage of the set operationtime t> or at IDMT mode of operation the calculated operation time. A new startingresets the counter which thus always contains the value from the latest starting. Whenthe stage has operated, the counter reading is 100.

5 Duration of the latest starting situation of stage I>> as a percentage of the set operatingtime t>>. A new starting resets the counter which thus always contains the value fromthe latest starting. When the stage has operated, the counter reading is 100.

0 Display of blocking signals and other external control signals. The leftmost digitindicates the state of the blocking inputs of the module. The following states may beindicated:0 = no incoming blockings1 = operation of stage I> blocked2 = operation of stage I>> blocked3 = operation of both stages blocked

In this register the middle green digit of the display is always zero. The leftmost greendigit indicates the state of the remote reset input, if any. The following states maybe indicated:0 = remote reset control input not energized1 = remote reset control input energized

From this register it is possible to move on to the TEST mode, where the start andoperation signals of the module can be activated one by one. For further details seethe description "General characteristics of C-type relay modules".

11


A The address code of the protection relay module, required by the serial communicationsystem. If the address code is set at zero the serial communication is out of use.The submenus in this register are:

1) Selection of data transfer rate for the serial communication.Selectable values: 300, 1200, 2400, 4800 or 9600 Bd. Default value 9600 Bd.

2) Bus communication counter. If the module is connected to a data communica-tion device and the communication system is working, the communicationcounter shows 0. If the communication is interrupted the numbers 0…255 isscrolling in the display.

3) Password required for the remote control of relay settings

- Display dark. By pressing the STEP push-button the starting point of the displaymenu obtained.

The values of the registers 1...5 are erased bypressing the push-buttons STEP and RESETsimultaneously or with the command V102.The register values are also erased if the auxiliarypower supply of the module is interrupted. Theaddress code of the relay module, the value of

the data transfer rate of the serial communica-tion and the password are not erased by anauxiliary voltage interruption. The instructionsfor setting the address and the data transfer rateare given in the description "General character-istics of C-type relay modules".

12

Main menus andsubmenus ofsettings andregisters

The diagram below shows the available mainmenus and submenus of the overcurrent relaymodule SPCJ 3C3.

Normal state, display switched off

21

Remotely set opera-tion time t>> x p4Operation time t>> of stage I>> 21

Checksum of switchgoup SG1


1

Set start current of stage I>>

Operation time t> ortime multiplier k of stage I>

SUBMENUSTEP FORWARDS 1 sSTEP BACKWARDS 0.5 s

MAIN

MENU

STEP

BACKWARDS

.5s

STEP

FARWARDS

1s

MAIN MENU SUBMENU

STEP 0.5 s RESET 1 s

1

2

Stored maximum phase current value Current value at last operation1

Current on phase L1

Current on phase L2

Current on phase L3

Set start current of stage I>

2 Remotely setchecksum of SG1

1 Remotely setchecksum of SG1

2

Remotely set start current value I>> x p3

Remotely set value t> x p2 or k x p2

Remotely set start current value I> x p1




1

Number of starts of the low-set stage I>2

3

Duration of the last start event of stage I>

5

4

Status of the external blocking /control input0

Address code of the relay moduleA

0 000

Data transfer rate [Bd]1

Number of starts of the high-set stage I>>

SS1 TS1 TS2IRF SS2

Bus communicationmonitor 0..255 s2 Password for

remote setting3

Duration of the last start event of stage I>>

= value that can be set in the setting mode

3 SG2 4 SG3

Instructions for entering a submenu or thesetting mode, procedures for doing the settingsand for handling the TEST mode are given in

the manual "General characteristics of C-typerelay modules".

13

The slope of the time/current curves is deter-mined by the values of the constants α and β:

Characteristic of the α β time/current curves

Normal inverse 0.02 0.14 Very inverse 1.0 13.5 Extremely inverse 2.0 80.0 Long-time inverse 1.0 120.0

According to the standard BS 142 of 1966 anormal current range is defined as 2...20 timesthe setting. Additionally the relay must start atthe latest when the measured current exceeds1.3 times the set start current, when the time/current characteristic is normal inverse, veryinverse or extremely inverse. At long-time in-verse characteristic, the normal range accordingto the standard is 2...7 times the set start currentand the relay is to start when the current exceeds1.1 times the set start current.

The following requirements with regard to op-eration time tolerances are specified in the stand-ard, where E denotes accuracy in per cent, - = notspecified:

I/I> Normal inverse Very inverse Extremely inverse Long-time inverse

2 2.22 E 2.34 E 2.44 E 2.34 E 5 1.13 E 1.26 E 1.48 E 1.26 E 7 - - - 1.00 E

10 1.01 E 1.01 E 1.02 E -20 1.00 E 1.00 E 1.00 E -

Over the normal current ranges, the inverse-time stage of the overcurrent module SPCJ 3C3complies with the tolerances of class 5 for allfour characteristics.

The time/current characteristics specified in thestandards are illustrated in Fig. 3, 4, 5, and 6.

Note.The actual operate time of the relay, presentedin the graphs in Fig. 3…6, includes an addi-tional filter and detection time plus the operatetime of the trip output relay. When the operatetime of the relay is calculated using the math-ematical expression above, these additional timesof about 30 ms in total have to be added to thetime received.

Time/currentcharacteristics(modified 2002-05)

The operation of the low-set current stage I> ofthe overcurrent module is based on either defi-nite time or inverse time characteristic. Theoperation characteristic is selected with switch 3of switchgroup SG1, see page 7.

When an I.D.M.T. characteristic is chosen, theoperation time of the low-set overcurrent stageI> will be a function of the current; the higherthe current, the shorter the operation time. Therelationship between current and time complywith the standards BS 142 of 1966 and IEC60255-3 and may generally be expressed as:

t = [s]

where t = operation time in secondsk = time multiplierI = measuring currentI> = set start current

The module includes four characteristics withdifferent slopes. The characteristic to be used ischosen with switches 1 and 2 of switchgroupSG1, see page 7.

k x β I α

I>( ) –1

14

Inverse-timecharacteristics ofovercurrent relaymodule SPCJ 3C3.

Fig. 3. Extremely inverse characteristic.

I = measured currentI> = set start currentt = operation timek = time multiplier

1 3 4 5 6 7 8 9 102 20 I/I>

0.05

0.1

0.2

0.3

0.4

0.6

0.8

1.0

k

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

30

40

70

60

50

t/s

15

Fig. 4. Very inverse characteristic.


1 2 3 4 5 6 7 8 9 10 20 I/I>

0.05

0.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91.0

k

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

70

60

50

40

30

t/s

16

Fig. 5. Normal inverse characteristic.

I = measured currentI> = set currentt = operation timek = time multiplier

0.05

0.1

0.2

0.3

0.4

0.5

0.60.70.80.91.0

k

1 2 3 4 5 7 8 9 10 20 I/I>60.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

30

40

50

60

70

t/s

17

Fig. 6. Long-time inverse characteristic.


1 2 3 4 5 10 206 7 8 9 I/I>

0.05

0.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91.0

k

0.2

0.3

0.4

0.5

0.6

0.70.80.9

1

2

3

4

5

6

7

89

10

20

30

40

50

60

708090

100

200

300

400

500

600

700

t/s

18

Technical data Low-set overcurrent stage I>Start current I> 0.5...2.5 x InStart time, typically 55 msOperate time t> at definite timecharacteristic 0.05...1.00 s, 0.5...10.0 s or

5...100 sTime/current curves at inversetime characteristic (IDMT) Extremely inverse

Very inverseNormal inverseLong-time inverse

Time multiplier k 0.05...1.00Reset time, typically 60 msRetardation time <30 msDrop-off/pick-up ratio, typically 0.96Operation time accuracy atdefinite time operation characteristic ±2% of set value or ±25 msOperation time accuracy class E atinverse time mode of operation 5Operation accuracy ±3% of set value

High-set overcurrent stage I>>Start current I>> 2.5...20.0 x In & ∞, infinite or

0.5...4.0 x In & ∞, infiniteStart time, typically 40 msOperation time t>> 0.04...1.00 s, 0.4...10.0 s or

4...100 sReset time, typically 60 msRetardation time <30 msDrop-off/pick-up ratio, typically 0.96Operation time accuracy ±2% of set value or ±25 msOperation accuracy ±3% of set value

19

E1...E8 are represented by the numbers 1, 2,4...128. The event mask is formed by multiply-ing, one by one, the above numbers either with0 (event not included in the reporting) or 1(event included in the reporting) and adding theproducts, check for the procedure for calculat-ing the checksum.

The event mask may take a value within therange 0...255. The default value of the relaymodule SPCJ 3C3 is 85, which means that allstart and trip signals are included in the report-ing, but not the resetting. The event codesE50...E54 and the events represented by thesecannot be excluded from the reporting.

Event codes for the overcurrent relay moduleSPCJ 3C3:

Event codes The substation level control data communica-tor is able to read, over the SPA serial bus, theevent data of the protection module of the relay,e.g. start and trip information. Event informa-tion that have been read are printed out in theformat: time (ss.sss) and event code. The eventcodes of the relay module SPCJ 3C3 are denotedE1...E8, E50 and E51. Additional event codes,i.e. E52…E54, are generated by the control datacommunicator. These event codes are, for in-stance, related to the data communication.

The event codes E1...E8 and the events repre-sented by these can be included in or excludedfrom the event reporting by writing, over theSPA-bus, an event mask (V155) to the relaymodule. The event mask is a binary numbercoded to a decimal number. The event codes

Code Event Number Factory setrepresenting default valuethe event

E1 Starting of stage I> 1 1E2 Reset of starting of stage I> 2 0E3 Tripping of stage I> 4 1E4 Reset of tripping of stage I> 8 0E5 Starting of stage I>> 16 1E6 Reset of starting of stage I>> 32 0E7 Tripping of stage I>> 64 1E8 Reset of tripping of stage I>> 128 0E50 Restarting * -E51 Overflow of event register * -E52 Temporary disturbance of the data communication * -E53 No response from the relaymodule over the data

communication * -E54 The relay module responds again over the data

communication * -

0 not included in the event reporting1 included in the event reporting* no code number- cannot be programmed

20

and some other data. Further, part of the datacan be altered by commands given over the SPAbus. Any information is located on channel 0,which needs not to be written in the data com-munication instructions.

Remote transferdata

Apart from the event codes the control datacommunicator is able to read, over the SPA bus,all input data (I data) of the relay module, setvalues (S values), output status data (O data)information recorded in the memory (V data),


Current on phase L1 as a multiple I1 R 0...63 x Inof the rated currentCurrent on phase L2 as a multiple I2 R 0...63 x Inof the rated currentCurrent on phase L3 as a multiple I3 R 0...63 x Inof the rated currentBlocking of tripping of stage I> I4 R 0 = no blocking

1 = tripping of stage I> blockedBlocking of tripping of stage I>> I5 R 0 = no blocking

1 = tripping of stage I>> blocked

Starting of stage I> O1 R 0 = stage I> has not started1 = stage I> started

Tripping of stage I> O2 R 0 = stage I> not tripped1 = stage I> tripped

Starting of stage I>> O3 R 0 = stage I>> not started1 = stage I>> started

Tripping of stage I>> O4 R 0 = stage I>> not tripped1 = stage I>> tripped

Alerted start value for stage I> S1 R 0.5...2.5 x InAlerted operation time for stage I> S2 R 0.05...100 sor time multiplier k 0.05...1.00Alerted start value for stage I>> S3 R 0.5...20 x In

999 = ∞, infiniteAlerted operation time for stage I>> S4 R 0.04...100 sAlerted checksum of switchgroup SG1 S5 R 0...255

Start value of stage I>, set with S11 R 0.5...2.5 x Inthe setting knobOperation time or time multiplier of S12 R 0.05...100 sstage I>, set with the setting knob 0.05...1.00Start value of stage I>>, set with S13 R 0.5...20 x Inthe setting knob 999 = ∞, infiniteOperation time of stage I>>, set S14 R 0.04...100 swith the setting knobChecksum of switchgroup SG1, S15 R 0...255set with the switches

Remote setting percentage of the S21 R, W 0...999%start value of stage I>Remote setting percentage of the S22 R, W 0...999%operation time or time multiplierof stage I>Remote setting percentage of the S23 R, W 0...999%start value of stage I>>Remote setting percentage of the S24 R, W 0...999%operation time of stage I>>Remotely set checksum for the S25 R, W 0...255switchgroup SG1

21


Remotely set start value of stage I> S31 R 0.5...2.5 x InRemotely set operation time value S32 R 0.05...100 sor time multiplier of stage I> 0.05...1.00Remotely set start value of stage I>> S33 R 0.5...20 x In

999 = ∞, infiniteRemotely set operation time value S34 R 0.04...100 sof stage I>>Remotely set checksum of switch- S35 R 0...255group SG1

Max. measured current or current V1 R 0...63 x Invalue at relay operationNumber of starts of stage I> V2 R 0...255Number of starts of stage I>> V3 R 0...255Duration of the latest start V4 R 0...100%situation of stage I>Duration of the latest start V5 R 0...100%situation of stage I>>Phase data recorded at the V6 R 1 = IL3>, 2 = IL2>, 4 = IL1>,latest triping occasion 16 = IL3>>, 32 = IL2>>,

64 = IL1>> + combinationsCurrent value at relay operation V7 R 0…63 x In

Resetting of output relays and V101 W 1 = output relays and operationoperation indicators indicators are resetResetting of output relays and V102 W 1 = output relays and operationoperation indicators and erasing indicators are reset andof recorded data registers (codes V1...V7)

are erased

Remote control of settings V150 R, W 0 = setting with knobs S11...S15alerted

1 = remote settings S31...S35alerted

Event mask word V155 R, W 0...255, see paragraph"Event codes"

Manual or automatic resetting of V156 R, W 0…15, see paragraphLED indicators (SG2) "Selector switches"Programming push-buttons (SG3) V157 R, W 0…7, see paragraph

"Selector switches"

Opening of password for remote V160 W 1...999setting of module parametersRenaming or closing of password V161 W 0...999for remote setting of parameters

Activation of the self-supervision V165 W 1 = self-supervision output issystem output activated and IRF indicator

turns on in about 5 seconds,whereafter the self-supervi-sion system and the IRFindicator reset.

Fault code number V169 R 0…255

22


Data communication address of V200 R, W 1...254the relay module

Program version number V205 R e.g. 052 B

Relay module type designation F R SPCJ 3C3

Reading of event register L R Time, channel number andevent code

Re-reading of event register B R Time, channel number andevent code

Reading of relay module state data C R 0 = normal state1 = module been subject to

automatic reset2 = overflow of event register3 = events 1 and 2 together


Time reading and setting T R, W 00.000...59.999 s

R = data to be read from the unitW = data to be written to the unit

The data transfer codes L, B, C and T have beenreserved for the event data transfer between therelay module and the substation level controldata communicator.

The event register can be read only once by theL command. Should a fault occur, for instance,in the data transfer, it is possible, by using the Bcommand, to re-read the contents of the eventregister once read by means of the L command.When required the B command can be re-peated.

The set values S1...S5 are the alerted set valuescurrently used by the relay. These values can beset either by means of the setting knobs andselector switches or by remote control. Thevalues S11...S15 are set with the setting knobsand the switches of the relay module. The valuesS21...S25 are percentage factors to be multi-plied by the set values given with the setting

knobs. The set values S21...S25 can be bothread and written. A condition for writing is thatthe password, V160, for remote setting has beenopened and the potentiometer settings must bevalid, V150=0. The variables S31...S35 containthe actual remotely set values.

The remote setting percentage of variablesS21...S24 can be given a percentage value withinthe range 0...999. This means that set valuesoutside the limits of the specified setting rangecan be given to a certain parameter. However,the proper operation of the relay is guaranteedonly for set values within the setting range limitsspecified in the technical data.

Activation of the self-supervision input (V165)prevents the relay from operating as long as theself-supervision input is active and the IRFindicator is lit.

23

After an operation the relay module indicates bymeans of variable V6 the phases (phase indica-tion) which have exceeded the setting value ofthe low-set stage or the high-set stage at themoment of operation. The same data are indi-cated by the LED indicators of the module, seesection "Operation indicators". The data are

binary numbers coded to decimal numbers, sothat, for the low-set overcurrent stage as well asfor the high-set overcurrent stage, each phase isrepresented by a specific number. The final codeis obtained by adding the separate phase codenumbers.

Coding of phase fault data:

Fault Codenumber

Low-set stage I> set value exceeded on phase L3 1Low-set stage I> set value exceeded on phase L2 2Low-set stage I> set value exceeded on phase L1 4High-set stage I>> set value exceeded on phase L3 16High-set stage I>> set value exceeded on phase L2 32High-set stage I>> set value exceeded on phase L1 64

For instance when V6 = 7 (1 + 2 + 4), the low-set current stage has operated (tripped) and thecurrent on each phase has exceeded the set startvalue of the low-set stage I>.

Register data V6 includes two separate parts,one for the low-set overcurrent stage and one forthe high-set overcurrent stage. If the low-setovercurrent stage operates, the value of registerV6 is updated with regard to the codes 1, 2 and

4 only. If the high-set overcurrent stage oper-ates, only the codes 16, 32 and 64 are updated.A new value always erases the old recordedvalue.

Register V6 can be set to zero either by pushingthe buttons STEP and RESET simultaneouslyor by giving the variable V102 the value 1 via theSPA bus.

Fault codes Shortly after the self-supervision system hasdetected a permanent internal fault the red faultindicator IRF on the relay module front panel islit. At the same time the self-supervision systemputs forward a control signal to the output relayof the self-supervision system. Further, in mostfault situations a self-diagnostic fault code isshown on the display of the relay module. Thefault code is composed of a red number one (1)

and a green, one or two digit code number. It isrecommended that the fault code number isnoted down and passed forward to the serviceshop when overhaul and repair of the faultyrelay module is ordered.

The three-phase overcurrent relay module SPCJ3C3 may display the following fault codes:

Fault code Type of fault

4 Trip signal path broken or output relay module missing30 Faulty program memory (ROM)50 Faulty random access memory (RAM)

195 Too low a value on the reference channel with multiplier 1131 Too low a value on the reference channel with multiplier 5

67 Too low a value on the reference channel with multiplier 25203 Too high a value on the reference channel with multiplier 1139 Too high a value on the reference channel with multiplier 5

75 Too high a value on the reference channel with multiplier 25253 No interruptions from the D/A converter

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SPCJ 1C8Non-directional earth-fault relay module


2

SPCJ 1C8Non-directional

earth-fault relay module

Contents Features .......................................................................................................................... 2Description of function .................................................................................................. 3Block diagram................................................................................................................. 4Front panel ..................................................................................................................... 5Start and operation indicators ......................................................................................... 6Relay settings .................................................................................................................. 6Selector switches ............................................................................................................. 7Measured information .................................................................................................... 8Recorded information ..................................................................................................... 9Main menu and submenus of settings and registers ...................................................... 10Time/current characteristic (modified 2002-05) ............................................................ 11Technical data .............................................................................................................. 16Event codes ................................................................................................................... 17Remote transfer data ..................................................................................................... 18Fault codes .................................................................................................................... 21

Both neutral overcurrent stages can sep-aratelybe blocked with an external control signal

Memory controlled function of start and opera-tion indicators selectable

Digital display of measured and set values as wellas data recorded at the moment a fault occurs

Constant self-supervision of hardware and soft-ware. At a permanent fault the alarm outputrelay picks up and the operation of tripping andsignalling outputs is blocked

Features Low-set neutral overcurrent stage I0> withselectable definite time or inverse definite mini-mum time (IDMT) operation characteristic

High-set neutral overcurrent stage I0>> withdefinite time operation characteristic

Automatic doubling feature of the set start valueof the high-set stage I0>> on sudden rise of theenergization current can be selected

The high-set stage I0>> can be set out of opera-tion if not needed

1MRS 750603-MUM EN

Issued 1996-12-31Modified 2002-05-15Version B (replaces 34 SPCJ 3 EN1)Checked MKApproved OL


3

The non-directional earth-fault relay moduleSPCJ 1C8 is a single-pole neutral overcurrentrelay module. It contains two neutral overcur-rent stages, i.e. a low-set overcurrent stage I0>and a high-set overcurrent stage I0>>.

The low-set or high-set overcurrent stage startsif the input energizing current exceeds the setstart value of the stage concerned. When start-ing, the stage provides a start signal SS1 or SS2and simultaneously the operation indicator ofthe stage is lit with yellow colour. If the overcur-rent situation lasts long enough to exceed the setoperate time, the stage that started also operatesand provides a tripping signal, TS1 or TS2. Atthe same time the operation indicator of theconcerned stage turns red. The start and opera-tion indicators can individually be given self-reset or manual reset mode of operation. If theself-reset mode of operation is selected, theindicator is automatically turned off when thestage resets. If the manual reset mode is selectedthe indicators are reset with the RESET push-button on the front panel of the relay module orvia the serial port by means of the commandV102 or V101.

The operation of the low-set overcurrent stageI0> can be blocked by routing a blocking signalBTS1 to the stage. Similarly, the starting of thehigh-set current stage I0>> can be blocked by ablocking signal BTS2. The blocking signals arerouted by means of switchgroup SGB on thePC-board of the relay module.

If the protection relay incorporates an auto-reclose module, switchgroup SGB is additionallyused for the purpose of selecting proper startsignals for the auto-reclose module. The in-structions for setting the switchgroup are givenin the general description of the protectionrelay, in the diagram illustrating the signal inter-change between the relay modules.

The operation of the low-set overcurrent stageI0> can be based on definite time or inverse time

characteristic. The operation characteristic isselected with switch SG1/3. At definite timecharacteristic the operate time t> is chosen fromone out of three operate time setting ranges. Thesetting range is selected with switches SG1/1and SG1/2. When the inverse time characteris-tic (IDMT) is used four time/current curvegroups, referred to as "Normal, very, extremelyand long-time inverse" are available. The re-quired operation characteristic is selected withswitch SG1/1 and SG1/2.

The operate time t>> of the high-set overcurrentstage I0>> is set separately. The setting range,one of three available alternatives, is selectedwith switch SG1/7 and SG1/8.

The two overcurrent stages are provided with aso called latching facility, which means that thetripping output remains energized, althoughthe signal which caused the operation disap-pears. The latching function is selected withswitch SG1/4 and the stages are reset by pressingthe push-buttons STEP and RESET simultane-ously.

The set start value I0>> of the high-set over-current stage may be automatically doubled onstarting. Thus the start value of the high-setovercurrent stage can be set lower than theconnection inrush current. The doubling fea-ture is selected with switch SG1/5. A start situ-ation is defined as a situation where the energiz-ing current rises from a value below 0.12 x I0>to a value exceeding 3.0 x I0> in less than 60 ms.The start situation ceases when the current fallsbelow 2.0 x I0>.

The start current setting range of the high-setovercurrent stage is selected with switch SG1/6.Two setting ranges are available, 0.5...4 x In and0.1...0.8 x In.

The operation of this stage may be totally blockedby selecting the setting value ∞, infinite.


4

Block diagram

Fig. 1. Block diagram for earth-fault relay module SPCJ 1C8.

I0 Energizing current (neutral current or residual current)BS1, BS2, BS3 External blocking signalsBTS1 Blocking of the operation of stage I0>BTS2 Blocking of the operation of stage I0>>SG1 Selector switchgroup on the front panelSGB Selector switchgroup on the PC board for blocking signals

and for the starting signals for auto-reclose functions, if applicableSS1 Start signal of stage I0>TS1 Operate signal of stage I0>SS2 Start signal of stage I0>>TS2 Operate signal of stage I0>>AR1, AR3 Start initiation signals for auto-reclosure functionsY Yellow indicator, startingR Red indicator, operation

NOTE!All input and output signals of the relay moduleare not necessarily wired to the terminals ofevery protection relay using this module. Thesignals wired to the terminals are shown in the

diagram illustrating the signal interchange be-tween the relay modules of the protection relayor feeder terminal in question.

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Front panel

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Current measurement indicator

Indicator and start valuesetting knob of stage I0>

Operate time setting knob andindicator or setting knob for timemultiplier k of stage I0>

Indicator and start valuesetting knob of stage I0>>

Operate time setting knob andindicator of stage I0>>


Self-supervision alarmindicator

Display for set, measuredand recorded values

Display step push-button

Selector switchgroup


Reset push-button

Start and operationindicatorsType designation ofrelay module

Fig. 2. Front panel of earth-fault relay module SPCJ 1C8.

6

Start andoperationindicators

An unreset operation indicator does not affectthe protective functions of the relay module.The relay module is constantly operative, re-gardless of the indicators have been reset or not.

The self-supervision alarm indicator IRF indi-cates that the self-supervision system has de-tected a permanent internal relay fault. Theindicator is lit with red light shortly after thefault has been detected. At the same time therelay module puts forward a control signal to theself-supervision system output relay of the pro-tection relay unit.

Additionally, in most fault cases, a fault codeshowing the type of the relay fault appears on thedisplay of the module. The fault code consists ofa red number one (1) and a green three-digitcode number. When a fault message appears onthe display, the code number should be noteddown to facilitate the subsequent fault findingand repair work.

Both overcurrent stages have their own yellow/red LED indicators. Yellow light indicates start-ing of the concerned overcurrent stage and redlight indicates that the overcurrent stage hasoperated.

The four LED indicators can, independently ofone another, be given self-reset or manual resetmode of operation. The manual reset modemeans that the indicator remains lit after beingswitched on, although the earth-fault stage,which controls the indicator, resets. If, for in-stance, the yellow start indication is given theself-reset mode and the red indicator the manualreset mode, the yellow indicator is lit, when thestage starts, turning red if and when the stageoperates. When the earth-fault stage resets onlythe red indication remains lit. The indicators,which have been given the manual reset mode,are reset locally by pushing the RESET push-button on the front panel or by remote controlover the SPA bus using the command V101 orV102.

Relay settings The setting values are shown by the threerightmost digits of the display. An LED indica-tor below each setting knob shows, when lit,

which setting value is currently being shown onthe display.

I0>/In Start current of stage I0> as a multiple of the rated current of the used relay energizinginput. Setting range 0.10...0.80 x In.

t> [s] Operate time of stage I0>, expressed in seconds, when the definite time operationcharacteristic (SG1/3 = 0). The setting range, i.e. 0.05...1.00 s, 0.5...10.0 s or 5...100 s,is determined by the position of the switches SG1/1 and SG1/2.

When the inverse definite minimum time (IDMT) operation characteristic isselected, switch SG1/3 = 1, the time multiplier k is set within the setting range0.05...1.00.

I0>>/In Start current of stage I0>> as a multiple of the rated current of the used relay energizinginput. The setting range, i.e. 0.5...4.0 x In or 0.1...0.8 x In, is selected with switchSG1/6. Addi- tionally, the setting infinite "∞" (displayed as - - -) can be selected,which means that stage I0>> is ot of function.

t>> [s] The operating time of the I0>> stage, expressed in seconds. The setting ranges,0.05...1.00 s, 0.5...10.0 s or 5...100 s, are determined by the position of switchesSG1/7 and SG1/8.

Further, the checksum of the function selectorswitchgroup SG1 is indicated on the displaywhen the indicator under the switchgroup is lit.In this way a check can be carried out to provethat the switches have been set as planned and

that the switches themselves work properly. Anexample of calculating the checksum is given inthe description "General characteristics of Ctype relay modules".

7

the front panel. The numbering of the switches,1...8, as well as the switch positions 0 and 1 aremarked on the front panel.

Selector switches Additional functions required by individualapplications are selected by means of the programselector switches of switchgroup SG1 located on

Switch Function

SG1/1 Switch SG1/3 is used for selecting the operation characteristic of the low-set currentSG1/2 stage I0>, i.e. definite time characteristic or inverse definite minimum time (IDMT)SG1/3 characteristic. At definite time characyeristic the setting range of the operate time t>

is selected by means of switches SG1/1 and SG1/2 whereas, at inverse definiteminimum time characteristic the switches are used for selecting the time/currentcharacteristic of the low-set stage I0>.

SG1/1 SG1/2 SG1/3 Characteristic Operation time t> ortype of characteristic

0 0 0 Definite time 0.05...1.00 s1 0 0 " 0.5...10.0 s0 1 0 " 0.5...10.0 s1 1 0 " 5...100 s

0 0 1 IDMT Extremely inverse1 0 1 IDMT Very inverse0 1 1 IDMT Normal inverse1 1 1 IDMT Long-time inverse

SG1/4 Selection of mode of operation for the operate signals TS1 and TS2.

When SG1/4 = 0, the operate signals returns to the initial state (= the output relaydrops off), when the energizing signal causing the operation falls below the set startlevel.When SG1/4 = 1, the operate signals remain on (= the output relay operated), althoughthe energizing signal falls below the set start level. Resetting with command V101 viathe serial interface or by pressing the push-buttons STEP and RESET simultaneously,which also erases the recorded information.

SG1/5 Selection of automatic doubling of the set start value of the high-set current stage I0>>when the protected object is connected to the network.

When SG1/5 = 0, no doubling of the set start value of stage I0>> is obtained.When SG1/5 = 1, the set start value of the stage I0>> doubles automatically.This makes it possible to give the high-set current stage a setting value below theconnection inrush current level of the protected object.

SG1/6 Selection of the setting range of the high-set overcurrent stage I0>>.

When SG1/6 = 0, the setting range is 0.5...4.0 x In and ∞, infiniteWhen SG1/6 = 1, the setting range is 0.1...0.8 x In and ∞, infinite

8

Switch Function

SG1/7 Selection of setting range of the operate time t>> of the high-set overcurrent stage I0>>.SG1/8

SG1/7 SG1/8 Operate time t>>

0 0 0.05...1.00 s1 0 0.5...10.0 s0 1 0.5...10.0 s1 1 5...100 s

Switchgroup SG2 is a so called software switch-goup, which is located in the third submenu ofswitchgroup SG1. The mode of operation, i.e.self-reset or manually reset, of the LED indica-tors I0> and I0>> is determined by the switchesof switchgoup SG2. The mode of operation can

be separately set for each indicator. The mode ofoperation is set by means of the checksum,which can be calculated from the followingtable. Normally the start indications are self-reset and the operation indications manuallyreset.

Indicator Manually reset Factory default

Start indicator I0> 1 0Operation indicator I0> 2 2Start indicator I0>> 4 0Operation indicator I0>> 8 8

Checksum 15 10

The PC board of the relay module contains aswitchgroup SGB including switches 1...8. Theswitches 1...3 are used for selecting start initia-tion signals to a possible auto-reclose relay mod-

ule, whereas switches 4...8 are used for routingexternal control signals to the neutral overcur-rent stages of the relay module in various protec-tion relays.

Measuredinformation

The measured values are displayed by the threerightmost digits of the display. The measured

neutral current is indicated with a LED indica-tor on the front panel.

Indicator Measured current

I0 Neutral current measured by the relay module as a multiple of the rated current Inof the used energizing input of the protection relay.

9

The leftmost digit of the display shows theaddress code of the register and the other threedigits the value of the register.

Recordedinformation


1 Maximum current measured as a multiple of the rated current of the protection. Theregister is updated when one of the following criteria is fulfilled:I) The measured current exceeds the value currently recordedII) The relay module operates. On operation the current value at operation is recorded.

2 Number of starts of the low-set current stage I0>, n (I0>) = 0...255.

3 Number of starts of the high-set current stage I0>>, n (I0>>) = 0...255.

4 Duration of the latest start situation of stage I0> as a percentage of the set operate timet> or at IDMT mode of operation the calculated operate time. A new start resets thecounter which then starts counting from zero. When the concerned stage hastripped, the counter reading is 100.

5 Duration of the latest start situation of stage I0>> as a percentage of the set operatetime t>>. A new start resets the counter which then starts counting from zero. Whenthe concerned stage has tripped, the counter reading is 100.

0 Display of blocking signals and other external control signals. The rightmost digitindicates the state of the blocking inputs of the module. The following states may beindicated:0 = no blockings1 = tripping of the low-set current stage I0> blocked2 = tripping of the high-set current stage I0>> blocked3 = tripping of both operation stages blocked

On this module the middle digit of the register is always a zero. The third digit fromthe right indicates the state of the remote reset input, if the protection relay isprovided with a control input. The following states may be indicated:0 = remote reset control input not energized1 = remote reset control input energized

From this register it is possible to move on to the Trip test mode. For further details,see the description "General characteristics of C-type relay modules".

A Address code of the protection relay module, required by the serial communicationsystem. Register A has three subregisters with the following contents:1) Selection of data transfer rate for the serial communication. Selectable values 300,

1200, 2400, 4800 or 9600 Bd. Default value 9600 Bd.2) Communication interruption counter. If the relay module is connected to a

communication system, which is in operation, the value of the communicationinterruption counter is 0 (zero). If the communication system is disturbed, thenumbers 0…255 are scrolling in the communication interruption counter.

3) Password required for remote setting of relay module parameters.

– Display dark. By pressing the STEP push-button the beginning of the display menuis re-entered.

The registers 1...5 are set to zero by pressing thepush-buttons STEP and RESET simultaneouslyor via the SPA bus with the command V102.The registers are also cleared if the auxiliarypower supply to the module is interrupted. Theaddress code of the relay module, the baud rate

of the serial communication and the passwordare not erased by a voltage failure. The instruc-tions for setting the address and the baud rate aredescribed in the "General characteristics of C-type relay modules".

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Normal state. Display switched off

Measured residual current Io

21

Remotely setvalue t>> x p4

Set operate time t>> 21

Checksum of switchgroup SG1


1

Set start current Io>>

Set operate time t> or time multiplier k

SUBMENUSSTEP FORWARDS 1 sSTEP BACKWARD 0,5 s

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STEP 0,5 s RESET 1 s

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Recorded max. value of the residual current1

Set start current Io>

2 Remotely setchecksum

1 Remotely setchecksum 3 Checksum of

switchgroup SG2

2

Remotely set value Io>> x p3

Remotely setvalue Io> x p1




Number of starts of stage Io>2

3

Duration of latest start situation of stage Io>

5

4

Incoming blockings orcontrol signals0

Relay module address code for communicationA Data transfer

rate [Bd]1

Number of starts of stage Io>>

Communicationcounter 0...255 s2 Password3

Duration of latest start situation of stage Io>>

0 000SS1 TS1 TS2IRF SS2

Remotely set value t> x p2 / k x p2

= value that can be set in the setting mode

The measures required for entering a submenuor a setting mode as well as how to perform thesettings and use the TEST mode are described in

Data Sheet "General characteristics of C-typerelay modules".

Main menu andsubmenus ofsettings andregisters

11

The operation of the low-set current stage I0> ofthe earth-fault relay module is based on eitherdefinite time or inverse time characteristics. Themode of operation is selected with switch 3 ofswitchgroup SG1 (see page 7).

When the IDMT mode of operation is selected,the operate time of the low-set current stage I0>will be a function of the current; the higher thecurrent, the shorter the operate time. The rela-tionship between current and time complies withthe standards BS 142.1966 and IEC 60255-3and may generally be expressed as:

t = [s]

wheret = operate time in secondsk = time multiplierI = current valueI0> = set current value

The module includes four characteristics withdifferent degrees of inversity. The characteristicto be used is selected with switches 1 and 2 ofswitchgroup SG1 (see page 7).

The degree of inversity is determined by thevalues of the constants α and β:

Degree of inversity of α βthe characteristic

Normal inverse 0.02 0.14Very inverse 1.0 13.5Extremely inverse 2.0 80.0Long-time inverse 1.0 120.0

According to the standard BS 142.1966 a nor-mal current range is defined as 2...20 times thesetting. Additionally the relay must start at thelatest when the current exceeds a value of 1.3times the setting, when the time/current charac-teristic is normal inverse, very inverse or ex-tremely inverse. When the characteristic is long-time inverse, the normal range in accordancewith the standard is 2...7 times the setting andthe relay is to start when the current exceeds 1.1times the setting.

The following requirements with regard to op-erate time tolerances are specified in the stand-ard (E denotes accuracy in per cent, - not speci-fied):

Time/currentcharacteristic(modified 2002-05)

k x β I α

I0>( –1)

I/I> Normal inverse Very inverse Extremely inverse Long-time inverse

2 2.22 E 2.34 E 2.44 E 2.34 E5 1.13 E 1.26 E 1.48 E 1.26 E7 - - - 1.00 E

10 1.01 E 1.01 E 1.02 E -20 1.00 E 1.00 E 1.00 E -

In the normal current ranges above, the inverse-time stage of the non-directional earth-faultrelay module SPCJ 1C8 complies with the tol-erances of class 5 at all degrees of inversity.

The time/current characteristics specified in thestandards are illustrated in fig. 3 … 6.

Note.The actual operate time of the relay, presentedin the graphs in Fig. 3…6, includes an addi-tional filter and detection time plus the operatetime of the trip output relay. When the operatetime of the relay is calculated using the math-ematical expression above, these additional timesof about 30 ms in total have to be added to thetime received.

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Fig. 3. Extremely inverse-time characteristic of earth-fault relay module SPCJ 1C8.

1 3 4 5 6 7 8 9 102 20 I/I>

0.05

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1 2 3 4 5 6 7 8 9 10 20 I/I>

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20

70

60

50

40

30

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Fig. 4. Very inverse-time characteristic of earth-fault relay module SPCJ 1C8.

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Fig. 5. Normal inverse-time characteristic of earth-faullt relay module SPCJ 1C8.

0.05

0.1

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k

1 2 3 4 5 7 8 9 10 20 I/I>60.02

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Fig. 6. Long-time inverse-time characteristic of earth-fault relay module SPCJ 1C8.

1 2 3 4 5 10 206 7 8 9 I/I>

0.05

0.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91.0

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4

5

6

7

89

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100

200

300

400

500

600

700

t/s

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Technical data Low-set current stage I0>Start current I0> 0.1...0.8 x InStart time, typically 60 msOperate time t> at definite time operation 0.05...1.00 s,

0.5...10.0 s or5...100 s

Operation characteristic at IDMTmode of operation Extremely inverse

Very inverseNormal inverseLong-time inverse

Time multiplier k 0.05...1.00Reset time, typically 60 msDrop-off/pick-up ratio, typically 0.96Operate time accuracy atdefinite time mode of operation ±2% of set value or ±25 msOperation time accuracy class E atinverse time mode of operation 5Operation accuracy ±3% of set value

High-set current stage I0>>Start current I0>> 0.5...4.0 x In & ∞, infinite or

0.1...0.8 x In & ∞, infiniteStart time, typically 50 msOperate time t>> 0.05...1.00 s,

0.5...10.0 s or5...100 s

Reset time, typically 60 msDrop-off/pick-up ratio, typically 0.96Operation time accuracy ±2% of set value or ±25 msOperation accuracy ±3% of set value

17

The event codes E1...E8 are represented by thenumbers 1, 2, 4...128. The event mask is formedby multiplying above numbers either with 0(event not included in reporting) or 1 (eventincluded in reporting) and adding up the num-bers received (compare calculation of checksum).

The event mask may have a value in the range0...255. The default value of the non-direc-tional earth-fault module SPCJ 1C8 is 85, whichmeans that all startings and trippings are in-cluded in the reporting, but not the resetting.The codes E50...E54 and the events representedby these cannot be excluded from the reporting.

Event codes of non-directional earth-fault mod-ule SPCJ 1C8:

Event codes The substation level control data communica-tor is able to read, over the SPA serial bus, theevent data of the module, e.g. starts and trip-pings, from the non-directional earth-fault relaymodule SPCJ 1C8. Event information calledfor are printed out in the format: time (ss.sss)and event code. The event codes of the moduleare E1...E8 and E50 and E51. Furthermore, thesubstation level control data communicator isable to form event codes relating to e.g. the datacommunication.

The codes E1...E8 and the events represented bythese can be included in or excluded from theevent reporting by writing an event mask (V155)to the module over the SPA bus. The event maskis a binary number coded to a decimal number.

Code Event Number Factory setrepresenting default valuethe event

E1 Starting of stage I0> 1 1E2 Starting of stage I0> reset 2 0E3 Tripping of stage I0> 4 1E4 Tripping of stage I0> reset 8 0E5 Starting of stage I0>> 16 1E6 Starting of stage I0>> reset 32 0E7 Tripping of stage I0>> 64 1E8 Tripping of stage I0>> reset 128 0E50 Restarting * -E51 Overflow of event register * -E52 Temporary disturbance in data communication * -E53 No response from the module over the data

communication * -E54 The module responds again over the data

communication * -

0 not included in the event reporting1 included in the event reporting* no code number- cannot be programmed

Note!The codes E52…E54 are formed by the sub-station level data communication equipment.

18

recorded in the memory (V data), and someother data. Further, part of the data can bealtered by commands given over the SPA bus.All the data are in channel 0.

Data to betransferredremotely

Apart from the event codes the substation levelcontrol data communicator is able to read, overthe SPA bus, all input data (I data), output data(O data) , setting values (S values), information


Measured neutral current I1 R 0...21 x InBlocking of tripping of stage I0> I2 R 0 = no blocking

1 = tripping of stage I0>blocked

Blocking of tripping of stage I0>> I3 R 0 = no blocking1 = tripping of stage I0>>

blocked

Starting of stage I0> O1 R 0 = stage I0> not started1 = stage I0> started

Tripping of stage I0> O2 R 0 = stage I0> not tripped1 = stage I0> tripped

Starting of stage I0>> O3 R 0 = stage I0>> not started1 = stage I0>> started

Tripping of stage I0>> O4 R 0 = stage I0>> not tripped1 = stage I0>> tripped

Activated start value for stage I0> S1 R 0.1...0.8 x InActivated operate time for S2 R 0.05...100 sstage I0> or time multiplier k 0.05...1.00Activated starte value for stage I0>> S3 R 0.1...4 x In

999 = ∞, out of operationActivated operate time for stage I0>> S4 R 0.05...100 sActivated checksum of switchgroup SG1 S5 R 0...255

Start value for stage I0>, S11 R 0.1...0.8 x Inset with the setting knobOperate time for stage I0>, or time S12 R 0.05...100 smultiplier, set with the setting knob 0.05...1.00Start value for stage I0>>, S13 R 0.1...4 x Inset with the setting knob 999 = ∞, out of operationOperate time for stage I0>>, S14 R 0.05...100 sset with the setting knobChecksum of switchgroup SG1 S15 R 0...255(set with the switches)

Remote setting percentage of the S21 R, W 0...999 %start value for stage I0>Remote setting percentage of the S22 R, W 0...999 %operate time for stage I0>, or timemultiplier kRemote setting percentage of the S23 R, W 0...999 %start value for stage I0>>Remote setting percentage of S24 R, W 0...999 %operate time for stage I0>>Remotely set checksum S25 R, W 0...255of switchgroup SG1

19


Remotely set start current for stage I0> S31 R 0.1...0.8 x InRemote setting value for the operate time S32 R 0.05...100 sof stage I0>, or time multiplier k 0.05...1.00Remotely set start current for stage I0>> S33 R 0.1...4 x In

999 = ∞Remote setting value for the S34 R 0.05...100 soperat time of stage I0>>Remotely set checksum for S35 R 0...255switchgroup SG1

Max. measured current or V1 R 0...21 x Incurrent at trippingNumber of starts of stage I0> V2 R 0...255Number of starts of stage I0>> V3 R 0...255Duration of the latest start V4 R 0...100 %situation of stage I0>Duration of the latest start V5 R 0...100 %situation of stage I0>>

Resetting of output relays V101 W 1 = output relays and ope-and operation indicators ration indicators resetResetting of output relays, operation V102 W 1 = output relays, operationindicators and recorded data indicators and registerssimultaneously (codes V1…V5) reset

Remote control of settings V150 R, W 0 = setting with knobsS11...S15 activated

1 = remote settingsS31...S35 activated

Event mask word V155 R, W 0...255, see section"Event codes"

Manual reset or self-reset mode V156 R, W 0…15, see paragraphof operation for the indicators (SG2) "Selector switches"

Opening of password for remote settings V160 W 1...999Changing or closing of password V161 W 0...999for remote settings

Activation of self-supervision system V165 W 1 = self-supervision systemoutput is activated andIRF indicator lit in about5 seconds, whereafterthe self-supervision sys-tem resets and the IRFindicator is switched off

Internal fault code V169 R 0…255

Data communication address of V200 R 1...254the module

Program version symbol V205 R e.g. 065 A

20


Type designation of the module F R SPCJ 1C8

Event register reading L R Time, channel numberand event code

Re-reading of event register B R Time, channel numberand event code

Reading of module state data C R 0 = normal state1 = module been subject

to automatic reset2 = overflow of event register3 = events 1 and 2 together


Time reading and setting T R, W 00.000...59.999 s

R = data to be read from the unitW = data to be written to the unit

The data transfer codes L, B, C and T have beenreserved for the event data transfer between themodule and the station level control data com-municator.

The event register can be read by the L-com-mand only once. Should a fault occur e.g. in thedata transfer, it is possible, by using the B-command, to re-read the contents of the eventregister read by means of the L-command. Whenrequired, the B-command can be repeated.

The setting values S1...S5 are the setting valuesused by the protection programs. These valuesare set either remotely or by means of the settingknobs. The values S11...S15 are settings set withsetting knobs or switches. S21...S25 are knobsetting percentage factors to be set remotely.The settings S21...S25 allow reading or writing.

To be able to write the password (V160) for theremote setting must be opened and the poten-tionmeter settings must be activated (V150=0).The variables S31...S35 contain the remotesetting values.

When changing the remote setting percentagesS21...S24, these variables can be given a per-centage factor within the range 0...999. Then itis also possible to alter the setting value beyondthe limits specified in the technical data of themodule. However, the validity of the settingvalues are guaranteed only within the limitsspecified in the technical data.

Activation of the self-supervision input (V165)prevents the protection from operating as longas the self-supervision input is active and theIRF indicator is on.

21

Fault codes Shortly after the self-supervision system hasdetected a permanent internal fault the red IRFindicator is lit. Simultaneously the relay moduleputs forward a control signal to the output relayof the self-supervision system. In most faultsituations an autodiagnostic fault code appearson the display of the module. The fault codeconsists of a red number 1 (one), and a green,one to three digit code number. When a fault is

detected the fault code should be recorded forfurther use when the relay module is to berepaired.

Some of the fault codes that may appear on thedisplay of the non-directional earth-fault relaymodule SPCJ 1C8 are shown in the followinglist:

Fault code Type of fault

4 Output relay control circuit interrupted or output relay module missing30 Faulty Read Only Memory (ROM)50 Faulty Random Access Memory (RAM)

195 Too low a value on reference channel with multiplier 1131 Too low a value on reference channel with multiplier 5

67 Too low a value on reference channel with multiplier 25203 Too high a value on reference channel with multiplier 1139 Too high a value on reference channel with multiplier 5

75 Too high a value on reference channel with multiplier 25253 No interruptions from the A/D converter

L1 IRF

>I

L2I L3II

1309

[ ]sk

>t0.5

0.05 1.0

13

2.5

0.5

0.04 1.0

0.5

1.5

2.5

STEP

RESET

SG1

0 1

1234567820

STEP

>>I

nI>I

nI>>I

>>t [ ]s

>I >>I

SPCJ 3C3

B

Indicators for measured values

Setting knob 1with indicator

Stage 1



Stage 2


Self-supervision alarm indicator(Internal Relay Fault)

Display, 1 + 3 digits

Step push-button (STEP)

Programming switches SG1


Reset push-button (RESET)

Start/operation indicators

General characteristics ofC-type relay modules


2

General characteristics ofC-type relay modules

Contents Push-buttons .................................................................................................................. 2Programming switches SG1 ............................................................................................ 2Setting knobs .................................................................................................................. 3Display ........................................................................................................................... 3

Display main menu ................................................................................................... 3Display submenu ....................................................................................................... 4Setting mode ............................................................................................................. 4Example: Operation in setting mode ......................................................................... 5Stored information .................................................................................................... 6Trip-test mode........................................................................................................... 7Example: Trip-test function ...................................................................................... 8

Operation indicators ....................................................................................................... 9Fault codes ...................................................................................................................... 9

Push-buttons The front panel of the relay module containstwo push-buttons. The STEP button is used forstepping forward in the display and the RESETbutton for resetting the red indicators. Addi-tionally, the push-buttons are used for certain

settings, e.g. for setting the address of the relaymodule and the data transfer rate for the serialcommunication when the modules are used inrelay packages provided with this quality. (Seesection Display).

Programmingswitches SG1

Part of the settings and the selections of theoperating characteristics for the relay modulesin various applications are made with the pro-gramming switches SG1 on the front panel. Theindicator of the switchgroup glows when the

checksum of the switchgroup is shown on thedisplay. The checksum can be used for checkingthat the switches are properly set. Fig. 2 gives anexample of calculating the checksum.

Fig. 2. Example of calculating the checksum of programming switchgroup SG1.

When the checksum calculated according to theexample is equal to the checksum indicated onthe display of the relay module, the switches areproperly set.

The function of the programming switches ofthe individual measuring relay modules is speci-fied in the description of the module concerned.

1MRS 750328-MUM EN

Issued 96-02-19Version A (replaces 34 SPC 2 EN1)Checked L-W UApproved TK


3

Setting knobs Most of the operating values and operatingtimes are set by means of the setting knobs onthe front panel of the relay module. Each settingknob has its own (LED) indicator which glowswhen the concerned setting value is shown onthe display.

If a setting knob is turned while the display isshowing another measured or set value, thevalue being set automatically appears on thedisplay. Simultaneously, the indicator for theconcerned setting starts glowing.

In addition to the settings made with the settingknobs, most modules allow so called remotesetting. This means that the settings made bymeans of the setting knobs of the module andthe checksum of the programming switchgroupmay be altered through an instruction over theserial communication bus. Remote setting ispossible if the password in the register A isknown, and the remote settings are not acti-vated, i.e. parameter V150=0. The circumstancethat the remote settings are activated is shownwith a flashing light of the indicator of thesetting knob, the value of which currently isbeing displayed.

Display The measured and set values as well as the datarecorded are shown on the display of the meas-uring relay module. The display consists of fourdigits. The three digits (green) to the rightindicate the measured, set or stored value andthe digit at the extreme left (red) the number ofthe register. The measured or set value displayedis indicated by a yellow LED indicator. Thenumber of the register glows only when a storedvalue is displayed.

When the auxiliary voltage is connected to ameasuring relay module, the module initiallytests the display by stepping through the digits1...9 for about 15 seconds. When the test isfinished the display turns dark. The testing canbe interrupted by pressing the STEP button.The protective functions of the module areoperative throughout the testing.

Display main menu All the data required during normal operatingconditions are accessible from the main menuwhich presents the measured values in real-time,the normal setting knob settings as well as themost important memorized data.

The data to be shown in the main menu areselected to the display in a certain sequence bymeans of the STEP button. When pressing theSTEP button for about one second, the displaymoves forward in the display sequence. Whenpressing it for about 0.5 seconds, the displaymoves backwards in the display sequence.

From a dark display only forward movement ispossible. When keeping the STEP button de-pressed, the display is continuously moving inforward direction stopping for a while at thedark point.

Unless the display is switched off by stepping tothe dark point, it remains activated for about 5minutes from the last pressing of the STEPbutton and then goes out.

4

Display submenu Less important values and values not very oftenset are displayed in the submenus. The numberof submenus varies with different relay moduletypes. The submenus are presented in the de-scription of the concerned module.

A submenu is entered from the main menu bypressing the RESET button for about one sec-ond. When the button thereafter is released, thered digit (STEP) of the display starts flashing,indicating that one is in a submenu. Going fromone submenu to another or back to the mainmenu follows the same principle as when mov-ing from the main menu display to another; the

display moves forward when pressing the STEPbutton for one second and backward whenpressing it for 0.5 seconds. The return to themain menu has taken place when the red STEPdisplay turns dark.

When entering a submenu from a measured orset value indicated by a LED indicator, theindicator remains glowing and the address win-dow (STEP) of the display starts flashing. Aflashing address window when no LED indica-tor is lit indicates that the submenu of a registerhas been entered.

Fig. 3. Example of the main and submenus for the settings of the overcurrent relay module SPCJ3C3. The settings made with the setting knobs are in the main menu and they are displayed bypressing the STEP button. In addition to the setting knob settings the main menu contains themeasured current values as well as the registers 1…5, as well as 0 and A. The remote settingpercentage and remote setting value are located in the submenus for the settings and are activatedon the display by pressing the RESET button.

Setting mode The registers of the main menu and the submenusalso contain parameters to be set. The settingsare made in the so called setting mode, which isaccessible from the main menu or a submenu bypressing the RESET button, until the digit atthe extreme right starts flashing (about 10 s).The flashing digit is set by means of the STEPbutton. The flashing is moved on from digit todigit by pressing the RESET button.

A set value is stored in the memory by pressingthe push-buttons STEP and RESET simultane-ously. In practice the RESET button must be

pressed slightly in excess of the STEP button.Return from the setting mode to the main menuor submenu is possible by pressing (for about 10s) the RESET button until the green digits onthe display stop flashing. If the module is left inthe setting mode, it will return automatically tothe start condition after about 5 minutes.

The values to be set in the setting mode are forinstance the address code of the relay moduleand the data transfer rate for the serial commu-nication. Further the percentage values for theremote settings can be changed.

5

Example 1: Function in the setting mode. Manual setting ofthe address code of a relay module and the datatransfer rate for the serial communication. Theinitial value for the address code is 146.

a)Press push-button STEP until register address Aappears on the display.

b)Press the RESET button for about 10 s until theright most digit starts flashing.

c)Press the STEP button repeatedly to set the digitto the value desired.

d)Press the RESET button to make the middle ofthe green digits flash.

e)Set the middle address digit by means of theSTEP button.

f)Press the RESET button to make the left mostgreen digit flash.

g)Set the digit by means of the STEP button.

h)Store the set address number in the memory ofthe relay module by pressing the RESET andSTEP button simultaneously. At the momentthe information enters the memory, the threegreen dashes flash in the display, i.e. A—.

i)Leave the setting mode by pressing the RESETbutton for about 10 s, until the display stopsflashing.

j)Then enter submenu 1 of register A by pressingthe RESET button for approx. one second. Theregister address A is then replaced by a flashing1. This submenu is used for setting the datatransfer rate of the serial communication.

k)The data transfer rate for the serial communica-tion is set and stored in the same way as theaddress, see sections b...i, except that the con-tinuously glowing register address has been re-placed by a flashing 1.

l)After storing the data transfer rate for the serialcommunication you may return to the mainmenu of register A by pressing the STEP buttonfor about 0.5 second.

6

Stored information The parameter values measured at the momentwhen a fault occurs are recorded in the registers,in some modules also the setting values. Therecorded data, except for some setting param-eters, are set to zero by pressing the push-buttons STEP and RESET simul-taneously.The data in normal registers are erased if theauxiliary voltage supply to the relay is disrupted,only the set values and the number ofautoreclosings are maintained in the registers ata voltage failure.

The number of the registers varies with differentmodule types. The function of the registers areillustrated in the descriptions of the separaterelay modules. Additionally, the system panelcontains a simplified list of the data recorded bythe various relay modules of the relay assembly.

All C-type relay modules are provided with twogeneral registers: register 0 and register A.

Register 0 contains, in coded form, the informa-tion about e.g. external blocking signals andstatus information for the circuit breaker. Thecodes are explained in the descriptions of therelay modules.

Register A contains the address code of the relaymodule as required by the serial communicationsystem. Example 1 on page 4 shows how theaddress code is altered. Submenu 1 of register Acontains the data transfer rate value expressed inkilobaud for the serial communication.

Submenu 2 of register A contains a bus trafficmonitor for the SPACOM system. If the protec-tive relay, which contains the relay module, islinked to a system including the control datacommunicator and the data communicationsystem is operating, the counter reading of themonitor will be zero. Otherwise the digits 1...255are continuously rolling in the monitor.

Submenu 3 contains the password required forchanging the remote settings. The address code,the data transfer rate for the serial communica-tion and the password can be set manually or viathe serial communication bus. For manual set-ting see example 1.

The start value for the address code and thepassword is 001 and that for the data transferrate 9.6 kilobaud.

7

Trip-test mode Register 0 also allows access to the so calledTrip-test function, which allows the outputsignals of the relay module to be activated one byone. If the auxiliary relay module of the protec-tion assembly is in place, the auxiliary relays willbe included in the testing.

When pressing the RESET button for about 10seconds, the three green digits to the right startflashing to indicate that the relay module is intest position. The indicators of the setting knobsindicate by flashing which output signal can beactivated. The required output function is se-lected by pressing the RESET button for about1 second, until the following LED indicatorstarts flashing.

The indicators of the setting knobs refer to thefollowing output signals:Setting knob 1 SS1 Starting of stage 1Setting knob 2 TS1 Tripping of stage 1Setting knob 3 SS2 Starting of stage 2Setting knob 4 TS2 Tripping of stage 2No indication IRF Self-supervision

The selected starting or tripping is activated bysimultaneous pressing of the push-buttons STEPand RESET. The signal remains activated aslong as the two push-buttons are being pressed.

The self-supervision output is activated by press-ing the STEP button once when no setting knobindicator is flashing. The IRF output is acti-vated in about 5 seconds after pressing of theSTEP button, and resets after that. Simultane-ously, the display returns to the main menu andperforms the initial testing indicated by rollingdigits 0...9 in the display several times.

The signals are selected in the order illustrated infig. 4.

REGISTER 0IRF SS1 TS1 SS2 TS2

STEP STEP+RESET

STEP+RESET

STEP+RESET

STEP+RESET

RESET10 s

RESET1 s

RESET1 s

RESET1 s

RESET1 s

RESET1 s

Fig. 4. Sequence order for selecting the output signals in the Trip-test mode.

If e.g. the indicator of the setting knob 2 (secondfrom the top) is flashing, and the push-buttonsSTEP and RESET are being pressed, the signalTS1 (tripping of stage 1) is activated. Return tothe main menu is possible at any stage of the

Trip-test sequence scheme, by pressing theRESET button for about 10 seconds. If themodule is left in the Trip-test mode, it willreturn automatically after approx. 5 minutes.

8

Example 2: Trip-test function. Forced activation of the out-puts is made as follows:

a)Step forward on the display to register 0.

b)Press the RESET button for about 10 secondsuntil the three green digits to the right and theLED indicator of the uppermost setting knobstart flashing.

c)Press the push-buttons RESET and STEP si-multaneously. Then the starting of stage 1 (e.g.the I>-stage of the overcurrent module SPCJ3C3) is activated and, simultaneously, the indi-cator of the stage starts glowing yellow.

d)Press the RESET button for about 1 seconduntil the indicator of the second setting knobstarts flashing.

e)Press the push-buttons RESET and STEP si-multaneously to activate tripping of stage 1 (e.g.the I>-stage of the overcurrent module SPCJ3C3). The indicator of the concerned stagestarts glowing red.

f)Starting and tripping of the second stage isactivated in the same way as stage 1. The indica-tor of the third or fourth setting starts flashing toindicate that the concerned stage has been acti-vated.

g)To activate the self-supervision output step to-wards the test position, where no indicator isflashing. Press the STEP button once. In about5 seconds the red IRF indicator starts glowingand the IRF output is activated. Shortly thereaf-ter the indicator goes out and the output auto-matically resets. At the same time the moduleleaves the test position.

h)It is possible to leave the trip test mode at anystep of the sequence scheme by pressing theRESET button for about 10 seconds until thethree digits to the right stop flashing.

9

Operationindicators

A measuring relay module is provided with twoseparate operating stages, each of which with itsown yellow/red operation indicator on the lowerpart of the front plate of the relay module.

The operation indicator starts glowing yellowwhen the operating stage starts and red when adelayed tripping operates. The functions of thestart and operation indicators are described indetail in the different protection relay modulemanuals.

Fault codes In addition to the protective functions the relaymodule is provided with a self-supervision sys-tem which continuously supervises the functionof the microprocessor, its program executionand the electronics.

When the self-supervision system has detected apermanent fault in the relay module, the redIRF indicator on the panel starts glowing soonafter the fault was discovered. At the same timethe module puts forward a signal to the self-supervision contact of the relay assembly.

In most fault situations a fault code, indicatingthe nature of the fault, appears on the display ofthe module. The fault code, which consists of ared digit (1) and a three digit green code number,cannot be removed from the display by reset-ting. When a fault occurs, the fault code shouldbe recorded and stated when service is ordered.

1MR

S 7

5124

6-M

UM

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ABB OySubstation AutomationP.O.Box 699FIN-65101 VAASAFinlandTel. +358 (0)10 22 11Fax.+358 (0)10 22 41094www.abb.com/substationautomation

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