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Technical Guide P92x/EN T05/C11

MiCOM P921-P922-P923

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CHAPTER 5User Guide

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Technical Guide P92x/EN T05/C11User Guide CHAPTER 5MiCOM P921-P922-P923 Page 1/110

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CONTENT

1. PRELIMINARY DEFINITIONS 5

2. INTRODUCTION TO THE USER INTERFACES AND SETTINGS OPTIONS6

2.1 Menu structure 7

2.2 Password protection 7

2.3 Front Panel User Interface (Keypad and LCD) 7

2.3.1 Default Display and Menu Time-Out 8

2.3.2 Menu Navigation and Setting Browsing 8

2.3.3 Password Entry 8

2.3.4 Modification of password 92.3.5 Setting Changes 9

3. MENU COLUMNS OF THE MiCOM P921 RELAY 10



5.1 Menu sequence 15

6. MiCOM P921 - P922 AND P923 - GENERAL SETTINGS 16

6.1 OP.PARAMETERS menu 16

6.2 Additional menu for MiCOM P922-P923 17

7. RELAY CONFIGURATION 18

7.1 "GENERAL" sub-menu 19

7.1.1 Description 19

7.1.2 HMI description 20

7.2 "VT RATIO" sub-menu 20

7.3 LEDS 5 to 8 configuration 21

7.3.1 Information available for MiCOM P921, MiCOM P922 and MiCOM P923 21

7.3.2 Additional information for the MiCOM P922 - MiCOM P923 23

7.3.3 Additional information for MiCOM P923 25

7.3.4 Example of configuration 25

7.4 "CONFIG SELECT" sub-menu (only for MiCOM P922 and P923) 26

7.5 ALARM sub-menu 27


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P92x/EN T05/C11 Technical GuideCHAPTER 5 User GuidePage 2/110 MiCOM P921-P922-P923

7.6 CONFIGURATION INPUTS sub-menu 27


7.7 "FREQ. and df/dt CONFIG" submenu 28


8. MEASUREMENTS 29

8.1 Configuration 29

8.1.1 "3Vpn" configuration (3VTs "Phase-Neutral") 29

8.1.2 "3Vpp+Vr" configuration (3 "Phase-Phase" VTs + 1 residual VT) 29

8.1.3 "2Vpp+Vr" configuration (2 Phase-Phase VTs + 1 residual VT) 30

8.1.4 "3Vpn+Vr" configuration (3 "Phase-Neutral" VTs + 1 residual VT) 30

8.2 MiCOM P921, MiCOM P922 and MiCOM P923 : common measurements 31

8.3 Specific measurements for the MiCOM P922-MiCOM P923 32

8.3.1 Maximum and average values 32


9. COMMUNICATION 34

9.1 Rear communication port description 34

9.2 Rear and front communication management 34

9.2.1 Modification through the front panel 34

9.2.2 Modification through the MiCOM S1 software (front port, RS232) 349.2.3 Modification through the rear port (RS485) 34

9.3 HMI description 35

9.3.1 Courier Interface 35

9.3.2 Modbus interface 35

9.3.3 Additional menu for P922 and P923 36

9.3.4 IEC60870-5-103 interface 36

10. PROTECTIONS 37

10.1 Undervoltage protection 38



10.2 Overvoltage protection 39



10.3 Residual overvoltage (neutral displacement) protection 42

10.4 Negative sequence overvoltage protection (MiCOM P922 and P923) 4410.5 Positive sequence undervoltage protection (MiCOM P922 and P923) 45

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10.6 Frequency protection (MiCOM P922 and P923) 47



10.7 Rate of change of frequency (MiCOM P923 only) 49


10.7.2 df/dt functionning 51

11. CONTROL FUNCTIONS 54

11.1 "TRIP OUTPUT RLY" Menu 54

11.1.1 MiCOM P921 - P922 and P923 : common information 55

11.1.2 Additional information for the MiCOM P922 MiCOM P923 relay 56

11.1.3 Additional information for the MiCOM P923 relay 57

11.2 "LATCH OUTPUTS" Menu 57


11.2.2 MiCOM P921-MiCOM P922 and P923 : common information 58

11.2.3 Additional information for the MiCOM P922 and P923 relay 59

11.2.4 Additional information for the MiCOM P923 60


11.3 "BLOCKING LOG1 t" Menu 61


11.3.2 MiCOM P921-P922 and P923 : common information 61




11.4 "BLOCKING LOG2 t" Menu 63

11.5 "AUX OUTPUT RLY" Menu 64


11.5.2 MiCOM P921, MiCOM P922 and P923: common information 64


11.5.4 Additional information for MiCOM P923 only 68

11.6 "LATCH OUTPUT RELAYS" Menu 69


11.6.2 MiCOM P921, MiCOM P922 and P923 : common information 69

11.7 "AND LOGIC EQUATION" Menu 70


11.7.2 MiCOM P921 and MiCOM P922 : common information 7011.7.3 Additional information for the MiCOM P922 relay 72

11.7.4 MiCOM P923 73


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11.8 "T DELAY EQUATION" Menu 78




11.9 "INPUTS" Menu 80


11.9.2 MiCOM P921 and MiCOM P922 : common information 81

11.9.3 Additional logic inputs for the MiCOM P922 and P923 relays 81

11.10 "CB SUPERVISION" Menu 82



12. RECORDS FUNCTIONS (ONLY MiCOM P922 AND P923) 84

12.1 "CB MONITORING" Menu 84

12.2 "FAULT RECORD" Menu 85

12.3 "DISTURB RECORDER" Menu 86



12.4 "TIME PEAK VALUE" Menu 87

12.5 "FREQ DISTURB REC" Menu (only MiCOM P923) 87


13. DISPLAY OF ALARMS 88

13.1.1 Electrical system alarms 88

13.1.2 "Relay" ALARMS 91

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1. PRELIMINARY DEFINITIONSIn this manual, all the following definitions and notations will be used :

Vr Residual voltage = 3 x zero sequence voltage

V0 Zero sequence voltageV1, V2 Positive and negative sequence voltages

VA, VB, VC Phase voltages

VAB, VBC, VCA Line voltages

Vn Rated voltage

VT Voltage transformer

DMT Definite minimum time

IDMT Inverse definite minimum time

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2.1 Menu structure

FIGURE 1 STRUCTURE MENU

The relays menu is arranged in a tabular structure. Each setting in the menu isreferred to as a cell, and each cell in the menu is accessed by reference to a row andcolumn address. The settings are arranged so that each column contains relatedsettings. As shown in figure 1, the top row of each column contains the headingwhich describes the settings contained within that column. Movement between thecolumns of the menu can only be made at the column heading level.

2.2 Password protectionThe password is 4 characters of upper case text. The factory default for the passwordis AAAA. The password is user-changeable once it has been correctly entered. Entry

of the password is achieved either by a prompt when a setting change is attempted,or by moving to the Password cell in the OP. PARAMETERS column of the menu. Ifthe password is lost, an emergency password can be supplied contact ALSTOM withthe relays serial number.

2.3 Front Panel User Interface (Keypad and LCD)When the keypad is exposed it provides full access to the menu options of the relay,with the information displayed on the LCD.

The,&, $ and " keys are used for menu navigation and setting value changes.

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2.3.1 Default Display and Menu Time-OutThe front panel menu has a selectable default display. The relay will time-out andreturn to the default display and turn the LCD back-light off after 5 minutes of keypadinactivity.

The default display can be choosen from the following options :

3 phase or line voltages, zero-sequence voltage, positive or negative voltage (P922-P923 only), frequency (P922-P923 only).

Whenever there is an uncleared alarm present in the relay (e.g. fault record,protection alarm, control alarm etc.) the default display will be replaced by:

Alarms

Entry to the menu structure of the relay is made from the default display and is notaffected if the display is showing the Alarms present message.

2.3.2 Menu Navigation and Setting BrowsingThe menu can be browsed using the four arrow keys, following the structure shown infigure 1. Thus, starting at the default display the key will display the first columnheading. To select the required column heading use the $ and " keys. The settingdata contained in the column can then be viewed by using the and& keys. It isonly possible to move across columns at the column heading level. To return to thedefault display press the& key from any of the column headings.

2.3.3 Password EntryWhen entry of a password is required the following prompt will appear:

Password =AAAA

A flashing cursor will indicate which character field of the password may be changed.

Press the& and keys to vary each character between A and Z. To move betweenthe character fields of the password, use the $ and " keys. The password isconfirmed by pressing the enter key#. To escape from this prompt press the clearkey. Alternatively, the password can be entered using the Password cell of theOP.PARAMETERS column.

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If the password is correct, the following message will appear :

Password OK

The P letter appears on the right hand side of the display :

[27] UndervoltageP

After 5 s, the display reverts to the previous display.

2.3.4 Modification of passwordTo modify the password, select the line Password in the OP PARAMETERS menu.Enter the previous password and press# key. Enter the new password and press the

# key.2.3.5 Setting Changes

To change the value of a setting, first navigate the menu to display the relevant cell.To change the cell value press the enter key#, which will bring up a flashing cursoron the LCD to indicate that the value can be changed. This will only happen if theappropriate password has been entered, otherwise the prompt to enter a passwordwill appear. The setting value can then be changed by pressing the & or keys.

When the desired new value has been reached it is confirmed as the new settingvalue by pressing#. This new value is immediately taken into account.

If the user wishes not to take into account the new value, then press the key. Thefollowing message will then appear :

Upgrade Cancel

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3. MENU COLUMNS OF THE MiCOM P921 RELAYThe menu of the MiCOM P921 is divided into columns which are:

HEADINGS OFCOLUMN

SUB MENUS DESCRIPTION See atPAGE

OP PARAMETERS General settings and data for the relay 16

CONFIGURATION 18

GENERAL Configuration of the default display, of theconnection and of the protection (phase-phaseor phase-neutral)

19

VT RATIO Settings of the primary and secondary ratedvoltages of VTs

20

LED LED 5 toLED 8

Configuration of the programmable LEDs 21

ALARMS Configuration of the instantaneous self reset. 27

CONFIGURATIONINPUTS

Logic input configuration, selection of voltagetype applied to the logic inputs

27

MEASUREMENTS Directly measured and calculated quantities 29

COMMUNICATION Information on the rear active protocol andchoice of the associated settings

34

PROTECTION Configuration of the protective features 37

[27]UNDERVOLTAGE Undervoltage settings 38

[59]OVERVOLTAGE Overvoltages settings 39

[59N]RESIDUAL O/V Residual O/V settings 42

AUTOMAT. CTRL 54

TRIP OUTPUT RLY Allocation of the selected information to thetrip output contact (RLI)

54

LATCH OUTPUTS Selection of the latched information 57

BLOCKING LOG1 t Allocation of the selected information to theblocking logic function 1

61


63

AUX OUTPUT RLY Allocation of the selected information to theauxiliary output contacts (RL2 to RL4)

64

LATCH OUTPUTRELAYS

Selection of latched output relays 69

AND LOGIC EQUAT Definition of the 2 logic equations (AND) 70

T DELAY EQUATION Definition of the associated timers 78

INPUTS Allocation of the selected information to thelogic inputs

80

CB SUPERVISION Settings of the close and open pulsecommands

82

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HEADINGS OFCOLUMN



CONFIGURATION 18


19


20

LED LED 5 toLED 8


CONFIG SELECT Selection of the active settings group 26

ALARMS Configuration of the instantaneous self reset,alarm battery.

27

CONFIGURATIONINPUTS


27



34

PROTECTION G1 Configuration of the protective features Group 1

37




[47]NEG SEQ O/V Negative sequence overvoltage settings 44

[27D]POS SEQ O/V Positive sequence undervoltage settings 45

[81]FREQUENCY Under/over frequency settings 47

PROTECTION G2 Configuration of the protective features Group 2 (identical to Group 1)

37

AUTOMAT. CTRL 54

TRIP OUTPUT RLY Allocation of the selected information to thetrip output contact (RLI)

54



61


63

AUX OUTPUT RLY Allocation of the selected information to theauxiliary output contacts (RL2 to RL8)

64

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HEADINGS OFCOLUMN


LATCH OUTPUTRELAYS


AND LOGIC EQUAT Definition of the 2 logic equations 70T DELAY EQUATION Definition of the associated timers 78


80

CB SUPERVISION Settings related to the CB supervision :- open/close pulse commands,- maximum authorised time for the

opening/closing of the CB,- maximum number of operations

82

RECORDS 84

CB MONITORING Records and diagnosis on the CB 84

FAULT RECORD Display of the last 5 faults 85

DISTURB RECORDER Disturbance recorder settings 86

TIME PEAK VALUE Time period for the average and peakdemands

87

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HEADINGS OFCOLUMN



CONFIGURATION 18


19


20

LED LED 5 toLED 8


CONFIG SELECT Selection of the active settings group 26

FREQ. and df/dtCONFIG

Selection of number of cycle, validationnumber for protection operation, configurationof undervoltage blocking

28

ALARMS Configuration of the instantaneous self reset,alarm battery.

27

CONFIGURATIONINPUTS


27



34

PROTECTION G1 Configuration of the protective features Group 1

37




[47]NEG SEQ O/V Negative sequence overvoltage settings 44

[27D]POS SEQ O/V Positive sequence undervoltage settings 45

[81]FREQUENCY Under/over frequency settings 47

[81R] FREQ CHANGEOF RATE

Rate of change of frequency settings 49

PROTECTION G2 Configuration of the protective features Group 2 (identical to Group 1)

37

AUTOMAT. CTRL 54

TRIP OUTPUT RLY Allocation of the selected information to the

trip output contact (RLI)

54



61

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HEADINGS OFCOLUMN



63

AUX OUTPUT RLY Allocation of the selected information to theauxiliary output contacts (RL2 to RL8) 64

LATCH OUTPUTRELAYS


AND LOGIC EQUAT Definition of the 4 logic equations 70

T DELAY EQUATION Definition of the associated timers 78


80

CB SUPERVISION Settings related to the CB supervision :

- open/close pulse commands,- maximum authorised time for theopening/closing of the CB,

- maximum number of operations

82

RECORDS 84

CB MONITORING Records and diagnosis on the CB 84

FAULT RECORD Display of the last 5 faults 85

DISTURB RECORDER Disturbance recorder settings 86

TIME PEAK VALUE Time period for the average and peak

demands

87

FREQ. DISTURB REC Frequency disturbance settings 87

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5.1 Menu sequenceP922 P921 P923

OP PARAMETERS OP PARAMETERS OP PARAMETERS

CONFIGURATION $ CONFIGURATION $ CONFIGURATION $

GENERAL $ GENERAL $ GENERAL $

VT RATIO $$ VT RATIO $$ VT RATIO $$

LED $ 2x$ LED $ 2x$ LED $ 2x$

CONFIG SELECT $ 3x$ CONFIG SELECT $ 3x$

FREQ. and df/dtCONFIG

$ 4x$

ALARMS $ 4x$ ALARMS $ 3x$ ALARMS $ 5x$

CONFIGURATION

INPUTS$ 5x$ CONFIGURATION

INPUTS$ 4x$ CONFIGURATION

INPUTS$"

MEASUREMENTS 2x$ MEASUREMENTS 2x$ MEASUREMENTS 2x$

COMMUNICATION 3x$ COMMUNICATION 3x$ COMMUNICATION 3x$

PROTECTION G1 4x$ PROTECTION 4x$ PROTECTION G1 4x$

PROTECTION G2 5x$ PROTECTION G2 5x$

AUTOMAT. CTRL 6x$ AUTOMAT. CTRL 5x$ AUTOMAT. CTRL 6x$

TRIP OUTPUT RLY 6x$ TRIP OUTPUT RLY 5x$ TRIP OUTPUT RLY 6x$

LATCH OUTPUTS 6x$$ LATCH OUTPUTS 5x$$ LATCH OUTPUTS 6x$$

BLOCKING LOG1 t 6x$ 2x$ BLOCKING LOG1 t 5x$ 2x$ BLOCKING LOG1 t 6x$ 2x$

BLOCKING LOG2 t 6x$ 3x$ BLOCKING LOG2 t 5x$ 3x$ BLOCKING LOG2 t 6x$ 3x$

AUX OUTPUT RLY 6x$ 4x$ AUX OUTPUT RLY 5x$ 4x$ AUX OUTPUT RLY 6x$ 4x$

LATCH OUTPUTRELAYS

6x$ 5x$ LATCH OUTPUTRELAYS

5x$ 5x$ LATCH OUTPUTRELAYS

6x$ 5x$

AND LOGICEQUAT

6x$ 6x$ AND LOGICEQUAT

5x$ 6x$ AND LOGICEQUAT

6x$ 6x$

T DELAYEQUATION

6x$ 7x$ T DELAYEQUATION

5x$ 7x$ T DELAYEQUATION

6x$ 7x$

INPUTS 6x$ 8x$ INPUTS 5x$ 8x$ INPUTS 6x$ 8x$

CB SUPERVISION 6x$ 9x$ CB SUPERVISION 5x$ 9x$ CB SUPERVISION 6x$ 9x$

RECORDS 6x$" RECORDS 6x$"

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6. MiCOM P921 - P922 AND P923 - GENERAL SETTINGSTo gain access to the OP.PARAMATERS menu from the default display, press the key once.

6.1 OP.PARAMETERS menuOP PARAMETERS Heading of the OP.PARAMETERS menu

PASSWORD=

****

Description : Enter the password to access the settings menus.Range : 4 characters. See paragraph 2.3.3 and 2.3.4 for additionalinformation.

DESCRIPTION=

P921- -

Description : Product description

Range : no modifications allowed, display only.

REFERENCE=

ALST

Description : Plant reference User programmable textRange : 4 characters

SOFTWARE VERSION

1.A

Description : Software reference for the productRange : no modifications allowed, display only.

FREQUENCY=

50 Hz

Description : Default sampling frequency must be set to powersystem frequency.Range : 50 Hz or 60 Hz

INPUTS : 54321

00000

Description : Indicates the current status of all the logic inputs : from1 to 2 (MiCOM P921), from 1 to 5 (MiCOM P922 and P923).Range : no modifications allowed, display only.Note : state=0 => input deenergised, state=1 => input energised

OUTPUTS : 8765432100000000

Description : Indicates the current status of all the output relaydrives : from1 to 4 (MiCOM P921), from 1 to 8 (MiCOM P922 andP923)Range : no modifications allowed, display only.Note : state=0 => output inactive, state=1 => output active

WARNING ! AS SOON AS THE PASSWORD HAS BEEN ENTERED, NO SETTINGSCHANGES BY USING THE COMMUNICATION LINK (RS485 OR RS232)CAN BE ACCEPTED.

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6.2 Additional menu for MiCOM P922-P923This menu allows the settings of the date and time of the MiCOM P922-P923, so thatall the records (events, faults and disturbance) can be correctly time/date stamped.The internal time clock accuracy is 1ms.

If the relay is integrated into a control-command system, the RS485 serial link can beused to realise the time synchronisation.

Note that this information must be checked and corrected periodically eithermanually or via the remote communication link.

This menu allows also the display of the actual active group (from firmware V4).

DATE

28/03/00

Description : setting of the current dateRange : 1-31 for days, 1-12 for months, 0-99 for yearsNote : default date = 01/01/94

TIME

23:03:10

Description : setting of the current timeRange : 0-23 for hours, 0-59 for minutes and seconds.

ACTIVE GROUP =

1

Description : display of the actual active groupRange : no modification allowed, display only.

NOTE : during the settings, if one of the data exceeds the minimum ormaximum value, then the following message will appear :

INCORRECTDATA

And the modifications are not taken into account.

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7. RELAY CONFIGURATIONThe CONFIGURATION menu makes it possible to configure the protection and theconnection which is used, and the VTs ratio. The allocation of the information to the 4programmable LEDS, the alarm configuration and the input configuration are also

done via this menu.To gain access to the CONFIGURATION menu from the default display, press once and $ once.

The accessible sub-menus are indicated below :

MiCOM P921 :CONFIGURATION

&

GENERAL $ VT RATIO $ LED $ ALARM $ CONFIGURATION

" " " " INPUT

&

LED 5 CONF. $ LED 6 CONF. $

V

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7.1.2 HMI descriptionTo gain access to the GENERAL menu from the default display, press once,once and once.

This sub-menu is common to the MiCOM P921, P922 and P923 relays :

GENERAL Heading of the GENERAL sub-menu

CONNECTION

3 Vpn

Description : Mode of connection for the VTs:Range :3Vpn = 3 Phase-Neutral VTs connection

3Vpp+Vr = 3 Phase-Phase VTs + Residual VT connection2Vpp+Vr = 2 Phase-Phase VTs + Residual VT connection3Vpn+Vr = 3 Phase-Neutral VTs + Residual VT connection

PROTECTION

PROT P-P

Description :selection of the voltage protection typeRange : PROT P-P / PROT P-NNote : this message only seen if "3Vpn" or "3Vpn+Vr" connection

selected

DEFAULT DISPLAY

Rms VA

Description : definition of the default display.Range : VA/VB/VC/V0 if "3Vpn" or "3Vpn+Vr"connection

Vab/Vbc/Vca/V0 if "3Vpp+Vr" connectionVab/Vbc/V0 if "2Vpp+Vr" connection

Note : in the MiCOM P922 and P923, frequency, V1 and V2 can alsobe selected

Please refer to chapter 2 of this Technical Guide for the complete description of theconnection schemes.

7.2 "VT RATIO" sub-menuTo gain access to the VT RATIO menu from the default display, press once,once, once and once.

This menu is common to the MiCOM P921, P922 and P923 relays. It makes itpossible to configure the VT ratios.

VT RATIO Heading of the VT RATIO sub-menu

MAIN VT PRIMARY

20.00 kV

Description : Primary of the voltage transformer(s) feeding the relayRange : 0.1-100kV, step =0.01kV (for the 57-130V model)

220-480V, step=10V (for the 220-480V model)

MAIN VT SECY

100 V

Description : Secondary of the voltage transformer(s) feeding the relayRange : 57-130V, step=0,1V (for the 57-130V model)Note : no VT secondary voltage for the 220-480V model

E/Gnd VT PRIMARY

20.00 kV

Description : Primary of the residual voltage transformer (if configured)Range : 0.1-100kV, step =0.01kV (for the 57-130V model)

220-480V, step=10V (for the 220-480V model)Note : this message only seen if "3Vpn+Vr", "3Vpp+Vr" or "2Vpp+Vr"connection selected

E/Gnd VT SECY

100 V

Description : Secondary of the residual voltage transformer (if

configured)Range : 57-130V, step=0.1V (for the 57-130V model)Note : this message only seen if "3Vpn+Vr", "3Vpp+Vr" or "2Vpp+Vr"connection selectedNo VT secondary voltage for the 220-480V model

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LED 5 CONF.

V>> = NO

Description : selection of the instantaneous information "V>>"Range : YES/NO

LED 5 CONF.tV>>= NO

Description : selection of the time-delayed information "tV>>"Range : YES/NO

LED 5 CONF.

V>>>= NO

Description : selection of the instantaneous information "V>>>"Range : YES/NO

LED 5 CONF.

tV>>>= NO

Description : selection of the time-delayed information "tV>>>"Range : YES/NO

LED 5 CONF.

V0> = NO

Description : selection of the instantaneous information "V0>"Range : YES/NO

LED 5 CONF.

tV0>= NO

Description : selection of the time-delayed information "tV0>"Range : YES/NO

LED 5 CONF.

V0>>= NO

Description : selection of the instantaneous information "V0>>"

Range : YES/NO

LED 5 CONF.

tV0>>= NO

Description : selection of the time-delayed information"tV0>>"Range : YES/NO

LED 5 CONF.

V0>>>= NO

Description : selection of the instantaneous information"V0>>>"Range : YES/NO

LED 5 CONF.

tV0>>>= NO

Description : selection of the time-delayed information"tV0>>>"Range : YES/NO

LED 5 CONF.

tAUX1= NO

Description : selection of the time-delayed information"tAUX1"Range : YES/NO

LED 5 CONF.

tAUX2= NO

Description : selection of the time-delayed information"tAUX2"

Range : YES/NO

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7.3.2 Additional information for the MiCOM P922 - MiCOM P923LED 5 CONF.

V2> = NO

Description : selection of the instantaneous information"V2>"Range : YES/NO

LED 5 CONF.

tV2>= NO

Description : selection of the time-delayed information"tV2>"Range : YES/NO

LED 5 CONF.

V2>>= NO

Description : selection of the instantaneous information"V2>>"Range : YES/NO

LED 5 CONF.

tV2>>= NO

Description : selection of the time-delayed information"tV2>>"Range : YES/NO

LED 5 CONF.

V1< = NO

Description : selection of the instantaneous information"V1

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LED 5 CONF.

F3 = NO

Description : selection of the instantaneous information"F3" (3rd

frequency stage)Range : YES/NO

LED 5 CONF.

tF3 = NO

Description : selection of the time-delayed information"tF3"

Range : YES/NO

LED 5 CONF.

F4 = NO

Description : selection of the instantaneous information"F4" (4th


LED 5 CONF.

tF4 = NO

Description : selection of the time-delayed information"tF4"Range : YES/NO

LED 5 CONF.

F5 = NO

Description : selection of the instantaneous information"F5"(5th


LED 5 CONF.

tF5 = NO


LED 5 CONF.

F6 = NO

Description : selection of the instantaneous information"F6" (6th


LED 5 CONF.

tF6 = NO


LED 5 CONF. F OUT

OF R = NO

Description : selection of the instantaneous information"Frequencyout of range"Range : YES/NO

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7.3.3 Additional information for MiCOM P923LED 5 CONF.

df/dt1= NO

Description : selection of the 1st rate of change of frequency elementRange : YES/NO

LED 5 CONF.

df/dt2= NO

Description : selection of the 2nd rate of change of frequency elementRange : YES/NO

LED 5 CONF.

df/dt3= NO

Description : selection of the 3rd rate of change of frequency elementRange : YES/NO

LED 5 CONF.

df/dt4= NO

Description : selection of the 4th rate of change of frequency elementRange : YES/NO

LED 5 CONF.

df/dt5= NO


LED 5 CONF.

df/dt6= NO


7.3.4

Example of configurationThe aim is :

The LED5 shall be on if the auxiliary input AUX1 is energised.

Settings :

Go into the AUTOMAT.CTRL menu, INPUTS sub-menu ( 11.9) and assignthe AUX1 information to one of the inputs.

In the LED5 menu, which is describes above, select YES in front of thetAUX1 information.

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7.4 "CONFIG SELECT" sub-menu (only for MiCOM P922 and P923)This menu allows the user to select the active setting group (1or 2). By default, theactive setting group is GROUP 1.

A digital input configured CHANG SET can operate either on edge or on level.

When the user chooses the LEVEL, then the change of setting group is onlyauthorized by a logic input (no possibility to change the group neither from rear portnor from front panel).

With this mode (LEVEL) and when the digital input is configured on high level (seeCONFIGURATION menu/CONFIGURATION INPUTS 7.6) so we have :

low level = GROUP 1high level = GROUP 2

If the user wants to change the setting group with either remote command or fromfront panel, he must choose to operate with EDGE mode.

Starting from firmware Version 4, the Active Group will be displayed (read modeonly) in the "OP PARAMETER" menu.

The change of the active setting group can also be done via a remote commandthrough the communication link (refer to chapter 6 of this Technical Guide).

To gain access to the CONFIG SELECT menu from the default display, press once, $ once, once and $ 3 times.

CONFIG SELECT Heading of the GROUP SELECT sub-menu

CHANGE GROUPINPUT EDGE

Description : selection of mode of changing the active groupRange : EDGE/LEVEL

SETTING GROUP

1

Description : selection of the active setting groupRange : 1 or 2Note : this message only seen if CHANGE GROUP INPUT isselected with option EDGE.

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=*+,

7.5 ALARM sub-menuThis menu allows the user to select the reset mode of the instantaneous informationsand to configure the battery alarms.

To gain access to the "ALARMS" menu from the default display, press once, $

once, once and $ 3 times (P921) or 4 times (P922) or 5 times (P923).7.5.1 HMI descriptionALARMS Heading of "ALARMS" submenu.

INST. SELF-RESET ?

NO

Description : display the RESET mode of the instantaneous alarms.Range : YES/NONote : if choosing YES, the instantaneous alarms will be resetautomatically (self-reset).If choosing NO, the reset will be done manually.

ALARMS BATTERY =

NO

Description : displays the ALARM battery messageRange : YES/NONote : the messages are : "RAM ERROR" or "BATTERY FAIL" in caseof Ram error and battery failure.

7.6 CONFIGURATION INPUTS sub-menuThis menu allows the user to configure the operation of the logic inputs ; either onfalling edge/low level or on rising edge/high level. When selecting 1, the logic inputbecomes active when it is excited or energized, and inactive when it is de-energized.This menu allows also the selection of the type of the auxiliary voltage signal to be

applied to the logic inputs.To gain access to the "CONFIGURATION INPUTS" menu from the default display,press once, $ once, once and $ 4 times (P921) or 5 times (P922) or 6 times(P923).

7.6.1 HMI descriptionCONFIGURATION

INPUTS

Heading of "CONFIGURATION INPUT

MiCOM P921INPUTS : 21

11

Description : configuration of the all logic inputsRange : 0 or 1

MiCOM P922 P923INPUTS : 54321

11111

Description : configuration of the all logic inputsRange : 0 or 1

VOLTAGE INPUTS =

DC

Description : selection of the type of the input voltage applied to

the logic inputs.Range : DC or AC

NOTE : with version V4 software and V3 hardware, the setting of theVOLTAGE INPUT should be DC.

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=*+,

8. MEASUREMENTSAll measured quantities are displayed in primary values (true RMS values, up to the10th harmonic). They are refreshed once per second.

8.1 ConfigurationAccording to the connection scheme, which is selected, the phase or line voltages willbe measured and then displayed.

8.1.1 "3Vpn" configuration (3VTs "Phase-Neutral")The 3 phase voltages VA, VB and VC will be measured by the MiCOM relay.

The derived quantities are the symetrical components of the voltage : zero-sequencevoltage (V0), positive and negative sequences voltages (V1 and V2 for MiCOM P922only).

V1 = 1/3 (VA + a VB +a2

VC) with a = e3/2j

V2 = 1/3 (VA + a2

VB + a VC)

V0 = 1/3 (VA + VB + VC)

If the protection mode is Phase-Phase, the line voltages Vab, Vbc and Vca will beused in the protection algorithms. These line voltages are derived from the formulasbelow :

VAB = (VB - VA)

VBC = (VC VB)

VCA = (VA VC)

8.1.2 "3Vpp+Vr" configuration (3 "Phase-Phase" VTs + 1 residual VT)The 3 line voltages Vab, Vbc, Vca and the residual voltage Vr are then measured bythe MiCOM relay.

The derived quantities are : positive and negative sequences voltages (V1 and V2,only for MiCOM P922) :

V1 = -1/3 (VAB +( )

( )a

a

21

1

+

VBC) with a = e

3/2j

V2 = -1/3 (VAB +( )

( )a

a

21

2

+

+VBC )

The only protection mode, which is available in this configuration, is the "Phase-Phase" mode.

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8.3 Specific measurements for the MiCOM P922-MiCOM P923In this menu, all the derived quantities are displayed : positive and negative sequencevoltages, peak and rolling demands.

8.3.1 Maximum and average valuesThe maximum and average values are calculated over a defined period of time : thistime period for the calculation of the average values is defined in the RECORDSmenu, TIME PEAK VALUE (see 12.4).

These values are updated each 1s : a new calculation will be done as soon as theuser has reseted those values through the HMI (see the menu below), or through thelocal or remote communication.

8.3.2 HMI descriptionV1 =

0.00 V

Description : Magnitude of the calculated positivesequence voltage V1

V2 =

0.00 V

Description : Magnitude of the calculated negativesequence voltage V2

MAX & AVERAGE V

RST = [C]

Description : reset of the voltages average andmaximum values (measured and derived quantities).

MAX. VA Rms =

0.00 V

Description : maximum value of the phase A voltage.Note : this message only seen if "3Vpn" or "3Vpn+Vr"connection.

MAX. VB Rms =

0.00 V

Description : maximum value of the phase B voltage.Note : this message only seen if "3Vpn" or "3Vpn+Vr"connection.

MAX. VC Rms =

0.00 V

Description : maximum value of the phase C voltage.Note : this message only seen if "3Vpn" or "3Vpn+Vr"

connection.

MAX. VAB Rms =

0.00 V

Description : maximum value of the line Vab voltage.Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"connection.

MAX. VBC Rms =

0.00 V

Description : maximum value of the line Vbc voltage.Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"connection.

MAX. VCA Rms =

0.00 V

Description : maximum value of the line Vca voltage.Note : this message only seen if "3Vpp+Vr" connection.

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=*+,

AVERAGE VA Rms =

0.00 V

Description : average value of the phase A voltage.Note : this message only seen if "3Vpn" or "3Vpn+Vr"connection.

AVERAGE VB Rms =

0.00 V

Description : average value of the phase B voltage.

Note : this message only seen if "3Vpn" or "3Vpn+Vr"connection.

AVERAGE VC Rms =

0.00 V

Description : average value of the phase C voltage.Note : this message only seen if "3Vpn" or "3Vpn+Vr"connection.

AVERAGE VAB Rms =

0.00 V

Description : average value of the line Vab voltage.Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"connection.

AVERAGE VBC Rms =

0.00 V

Description : average value of the line Vbc voltage.Note : this message only seen if "3Vpp+Vr" or "2Vpp+Vr"connection.

AVERAGE VCA Rms =

0.00 V

Description : average value of the line Vca voltage.Note : this message only seen if "3Vpp+Vr" connection.

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9. COMMUNICATION9.1 Rear communication port description

The rear communication port is provided by a 3-terminal screw connector located onthe back of the relay.

The rear port provides RS485 serial data communication and is intended for use witha permanently-wired connection to a remote control centre. Of the three connections,two are for the signal connection which can be connected either way round, and theother is for the earth shield of the cable.

The rear RS485 interface is isolated and is suitable for permanent connectionwhichever protocol is selected. The advantage of this type of connection is that up to32 relays can be daisy chained together using a simple twisted pair electricalconnection.

All the connections are described in details into the Chapter 2 of this Technical

Guide.9.2 Rear and front communication management9.2.1 Modification through the front panel

If there is any modification of the settings done through the front panel, adownloading of a new settings file via the MiCOM S1 software (locally), or via aremote master station will be forbidden.

The change of settings will be possible as soon as the setting mode will elapse (at theend of the 5mn timer or after power off/power on of the relay).

9.2.2 Modification through the MiCOM S1 software (front port, RS232)If there is any modification of the settings through the MiCOM S1 software, amodification through the front panel will be forbidden and the following message willappear :

Write lockout

9.2.3 Modification through the rear port (RS485)If the user is trying to access simultaneously to the settings of the relay through theRS232 and RS485 communication ports, there will be no messages on the display ofthe MiCOM relay : the last modifications will be taken into account without any

warning.

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=*+,

9.3 HMI descriptionThe COMMUNICATION menu depends on the rear communication protocolwhich is implemented into the MiCOM relay. This protocol must be selected at theorder among the following protocols : Kbus/Courier, Modbus, IEC60870-5-103.Please refer to the cortec page (Chapter 3 of this Technical Guide).

9.3.1 Courier InterfaceCourier is the communication language developed by ALSTOM T&D Protection &Control to allow remote interrogation of its range of protection relays. Courier workson a master/slave basis where the slave units contain information in the form of adatabase, and respond with information from the database when it is requested by amaster unit.

The relay is a slave unit which is designed to be used with a Courier master unit suchas MiCOM S1, MiCOM S10, PAS&T, ACCESS or a SCADA system. MiCOM S1 is a

Windows 98 and NT compatible software package which is specifically designed for

setting changes with the relay.To gain access to the COMMUNICATION menu from the default display, press once and $ 3 times. The HMI is described below :

COMMUNICATION Heading of the COMMUNICATIONS menu

COMMUNICATION ?

YES

Description : enable/disable the "COMMUNICATION" functionRange : YES/NO

RELAY ADDRESS

1

Description : selection of the Kbus address of the relayRange : 1 to 255.Note : message only seen if the communication has been enabled

9.3.2 Modbus interfaceModbus is a master/slave communication protocol which can be used for networkcontrol. In a similar fashion to Courier, the system works by the master deviceinitiating all actions and the slave devices (the relays) responding to the master bysupplying the requested data or by taking the requested action. Modbus

communication is achieved via a twisted pair connection to the rear port and can beused over a distance of 1000m and up to 32 slave devices.

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To gain access to the COMMUNICATION menu from the default display, press once and $ 3 times. The HMI is described below :


COMMUNICATION ?

YES

Description : selection of the function "COMMUNICATION"Range : YES/NO

BAUD RATE

19200 Bd

Description : selection of the baud rateRange : 300/600/1200/2400/4800/9600/19200/38400 BaudsNote : message only seen if the communication has been enabled

PARITY

NONE

Description : selection of the parityRange : NONE / EVEN / ODDNote : message only seen if the communication has been enabled

STOP BITS

1

Description : selection of the stop bits numberRange : 1 or 2Note : message only seen if the communication has been enabled

RELAY ADDRESS

1

Description : selection of the Modbus address of the relayRange : 1 to 255.Note : message only seen if the communication has been enabled

9.3.3 Additional menu for P922 and P923DATE FORMAT =

PRIVATE

Description : selection of the mode of the format of date forsynchronizationRange : PRIVATE or IEC

9.3.4 IEC60870-5-103 interfaceThe IEC60870-5-103 interface is also a master/slave interface with the relay as theslave device. This protocol is based on the VDEW communication protocol. The relayconforms to compatibility level 2, compatibility level 3 is not supported.

To gain access to the COMMUNICATION menu from the default display, press once and $ 3 times. The HMI is described below :


COMMUNICATION ?

YES

Description : enable/disable the "COMMUNICATION" functionRange : YES/NO

BAUD RATE

19200 Bd

Description : selection of the baud rateRange : 9600 or19200 BaudsNote : message only seen if the communication has been enabled

RELAY ADDRESS

1

Description : selection of the IEC address of the relayRange : 1 to 255.Note : message only seen if the communication has been enabled

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=*+,

10. PROTECTIONSTo gain access to the PROTECTION menu (or PROTECTION G1 for MiCOMP922 and P923) from the default display, press once and 4 times $.

The accessible sub-menus are then indicated below :

MiCOM P921 :PROTECTION

&

[27]UNDERVOLTAGE $ [59]OVERVOLTAGE $ [59N]RESIDUAL O/V

" "

MiCOM P922 :PROTECTION G1

&

[27]UNDERVOLTAGE $ [59]OVERVOLTAGE $ [59N]RESIDUAL O/V $ [47] NEG SEQ O/V $

" " " "

PROTECTION G1

[27D] POS SEQ U/V $ [81] FREQUENCY

"

MiCOM P923 :PROTECTION G1

&

[27]UNDERVOLTAGE $ [59]OVERVOLTAGE $ [59N]RESIDUAL O/V $ [47] NEG SEQ O/V $

" " " "

PROTECTION G1

[27D] POS SEQ U/V $ [81] FREQUENCY $ [81R]FREQ CHANGE

" " OF RATE

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10.1 Undervoltage protection10.1.1 Description

This function can be configured according to the connection scheme of the VTs :phase-phase protection (delta connection) or phase-neutral protection (star

connection).

The configuration of this function can also be done in order to detect an absence ofvoltage for all phases :

Undervoltage condition for one of the 3 phases (select OR for the consideredstage),

Undervoltage condition for all 3 phases (select AND for the considered stage).The settings of the voltage thresholds are done in secondary values.

The relay will trip according to an inverse characteristic or a definite time

characteristic for the first stage and according to a definite time characteristic for thesecond and third stages.

The inverse characteristic is given by the following formula :

t = K / ( 1-M )

Where, K = Time Multiplier Setting

t = operating time in seconds

M = Applied input voltage / Relay setting voltage (Vs).

10.1.2 HMI descriptionTo gain access to the UNDERVOLTAGE sub-menu from the default display, press once, $ 4 times and once.

[27] UNDERVOLTAGE Heading of the undervoltage sub-menu.

[27] V

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=*+,

[27] tRESET V=

NO

Description : configuration of the first overvoltage stageRange : NO / AND / ORNote : if disabled ( NO selected), all the following messages areinvisible, until V>> message.

[59] V>=

130.0 V

Description : setting of the first overvoltage stageRange : range 57-130V : 5-200V, step =0.1V

range 220-480V : 20-720V, step = 0.5V

[59] DELAY TYPE =

DMT

Description : selection of the time delay characteristicRange : definite time (DMT) / inverse definite time (IDMT)

[59] TMS=

1.0

Description : time multiplier setting.Range : 0.5 100, step = 0.5Note : this message only seen if IDMT time delay selected

[59] tRESET V>

10 ms

Description : reset time for the first overvoltage stageRange : 0 100s, step = 0,01sNote : this message only seen if IDMT time delay selected

[59] tV>=

40 ms

Description : time delay setting for a definite time curve.Range : 0 599s, step = 0.01sNote : this message only seen if DMT time delay selected

[59] V>>=

NO

Description : configuration of the 2nd overvoltage stageRange : NO / AND / ORNote : if disabled ( NO selected), all the following messages areinvisible, until V>>> message.

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=*+,

[59] V>>=

130.0 V

Description : setting of the 2nd overvoltage stageRange : range 57-130V : 5-260V, step =0.1V

range 220-480V : 20-960V, step = 0.5V

[59] tV>>=

40 ms

Description : time delay setting for the definite time curve.

Range : 0 599s, step = 0.01sNote : definite time delay only for this stage

[59] V>>>=

NO

Description : configuration of the 3rd overvoltage stageRange : NO / AND / ORNote : if disabled ( NO selected), all the following messages areinvisible, until the heading of the sub-menu.

[59] V>>>=

130.0 V

Description : setting of the 3rd overvoltage stageRange : range 57-130V : 5-260V, step =0.1V

range 220-480V : 20-960V, step = 0.5V

[59] tV>>>=

40 ms

Description : time delay setting for the definite time curve.Range : 0 599s, step = 0.01sNote : definite time delay only for this stage

[59] HYSTERESIS =

0.98

Description : setting of the HYSTERESIS elementRange : 0.98 0.95 step of 0.01

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10.3 Residual overvoltage (neutral displacement) protectionThe neutral voltage protection shall operate :

from the zero sequence voltage due to the sum VR=(Va + Vb + Vc) in 3VTsconnection (the summation is realized internally),

or directly from the residual voltage VRwhich is measured in 2 VTs connection.The inverse characteristic (only for the 1st stage) is given by the following formula :

t = K / (1 M)



M = Applied input voltage / Relay setting voltage (Vs)

To gain access to the RESIDUAL O/V sub-menu from the default display, press once, $ 4 times, once and $ twice.

[59N] RESIDUAL O/V Heading of the RESIDUAL O/V menu

[59N] V0>=

NO

Description : configuration of the 1st residual overvoltage stageRange : YES/NONote : if disabled ( NO selected), all the following messages areinvisible, until V0>> message.

[59N] V0>=

5.0 V

Description : setting of the 1st residual overvoltage stageRange : range 57-130V : 0.5-130V, step = 0.1V

range 220-480V : 2-480V, step = 0.5V

[59N] DELAY TYPE =

DMT

Description : selection of the time delay characteristicRange : definite time (DMT) / inverse definite time (IDMT)

[59N] TMS=

1.0

Description : time multiplier setting.Range : 0.5 100, step = 0.5

Note : this message only seen if IDMT time delay selected

[59N] tRESET V0>

10 ms

Description : reset time for the first residual overvoltage stageRange : 0 100s, step = 0,01sNote : this message only seen if IDMT time delay selected

[59N] tV0>=

40 ms

Description : time delay setting for a definite time curve.Range : 0 599s, step = 0.01sNote : this message only seen if DMT time delay selected

[59N] V0>>=

NO

Description : configuration of the 2nd residual overvoltage stageRange : NO / AND / ORNote : if disabled ( NO selected), all the following messages areinvisible, until V0>>> message.

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=*+,

[59N] V0>>=

5.0 V

Description : setting of the 2nd residual overvoltage stageRange : range 57-130V : 0.5 130V, step =0,1V

range 220-480V : 2 480V, step = 0,5V

[59N] tV0>>=

40 ms

Description : time delay setting for a definite time curve.


[59N] V0>>>=

NO

Description : configuration of the 3rd residual overvoltage stageRange : NO / AND / ORNote : if disabled ( NO selected), all the following messages areinvisible, until the heading of the sub-menu.

[59N] V0>>>=

5.0 V

Description : setting of the 2nd residual overvoltage stageRange : range 57-130V : 0.5 130V, step =0.1V

range 220-480V : 2 480V, step = 0.5V

[59N] tV0>>>=

40 ms

Description : time delay setting for a definite time curve.Range : 0 599s, step = 0.01sNote : definite time delay only for this stage

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=*+,

[47] V2>>=

5.0 V

Description : setting of the 2nd stageRange : range 57-130V : 5 200V, step =0.1V

range 220-480V : 20 720V, step = 0.5V

[47] tV2>>=

40 ms

Description : time delay setting for the definite time curve.


10.5 Positive sequence undervoltage protection (MiCOM P922 and P923)The relay will trip according to an inverse characteristic or a definite timecharacteristic for the first stage and according to a definite time characteristic for thesecond stage.

The inverse characteristic is given by the following formula :

t = K / (1 M)



M = Applied input voltage / Relay setting voltage (Vs).

To gain access to the POS SEQ U/V sub-menu from the default display, press once, $ 4 times, once and $ 4 times.

[27D] POS SEQ U/V Heading of the POS.SEQ U/V menu

[27D] V1

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[27D] V1

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=*+,

10.6 Frequency protection (MiCOM P922 and P923)10.6.1 Description

The principle of measurement of frequency is based in general on the measurementof time every cycle, thus a new measurement is started at each voltage zero crossing.

Numerical filters are used to minimize the harmonics influence.

Precautions have been made to make this mode of calculation insensitive to thevector shifts and phases jumps.

This function will be inhibited if the voltage level for each phase is below the blockingminimum voltage. This voltage is settable (P923) in the CONFIGURATION menu (5to 130V for range 1 and 20 to 480V for range 2).

The information Freq. Out Of Range will be generated :

in the above mentioned application,

if the frequency is out of the range : fmeasured > fn+20Hz or fmeasured < fn20Hzwith fn=50Hz or 60Hz according to the settings of the relay.

10.6.2 HMI descriptionTo gain access to the FREQUENCY sub-menu from the default display, press once, $ 4 times, once and " once (P922) or " twice (P923).

[81] FREQUENCY Heading of the FREQUENCY sub-menu

[81] F1=

NO

Description : configuration of the 1er stageRange : NO / 81> / 81 / 81 / 81 / 81 / 81 / 81 (fn+20Hz) or fmeasured < (fn20Hz)To gain access to this menu the default display,press once, $ 4 times, onceand " once.

10.7.1 HMI description[81R] FREQ CHANGE

OF RATE

Heading of the Rate of change of Frequency sub-menu

[81R] df/dt1 =

NO

Description : configuration of the 1er stageRange : YES/NO

[81R] df/dt1 =

1.0 Hzs

Description : setting of the 1er stageRange : [ 10Hz/s to + 10Hz/s], step = 0.1

[81R] df/dt2 =

NO

Description : configuration of the 2nd stageRange : YES/NO

[81R] df/dt2 =

1.0 Hzs

Description : setting of the 2nd stageRange : [ 10Hz/s to + 10Hz/s], step = 0.1

[81R] df/dt3 =

NO

Description : configuration of the 3rd stageRange : YES/NO

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[81R] df/dt3 =

1.0 Hzs

Description : setting of the 3rd stageRange : [ 10Hz/s to + 10Hz/s], step = 0.1

[81R] df/dt4 =

NO

Description : configuration of the 4th stage

Range : YES/NO

[81R] df/dt4 =

1.0 Hzs

Description : setting of the 4th stageRange : [ 10Hz/s to + 10Hz/s], step = 0.1

[81R] df/dt5 =

NO

Description : configuration of the 5th stageRange : YES/NO

[81R] df/dt5 =

1.0 Hzs

Description : setting of the 5th stageRange : [ 10Hz/s to + 10Hz/s], step = 0.1

[81R] df/dt6 =

NO

Description : configuration of the 6th stageRange : YES/NO

[81R] df/dt6 =

1.0 Hzs

Description : setting of the 6th stage

Range : [ 10Hz/s to + 10Hz/s], step = 0.1

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=*+,

10.7.2 df/dt functionning

32

32

2/

=

ii

iii

tt

ffdtdf

21

21

1/

=

ii

iii

tt

ffdtdf

fi-1

1

1

/

=

ii

iii

tt

ffdtdf

fifi-2

ii

iii

tt

ffdtdf

=

+

+

+

1

1

1/

fi+1

FIGURE 2

The rates of change of frequency are calculated every cycle based upon the frequencyvalues being insensitives to vector shifts, phase jumps and harmonics.

NOTE: To be insensitive to the phase shift and vector jumps, we rejectall measuements of df/dt greater than 20Hz/s .

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1 2 3

FIGURE 3

CONFIGURATION

Menu :

df/dt: CYCLE NB=3

df/dt: VALIDAT.NB= 2

PROTECTION

Menu :

(setting of the 1er stage)

[81R] df/dt1: =0.5 Hzs

After the first three instantaneous df/dt values, the firstaverage value will be calculated (fig.2). This averagevalue will be compared to the threshold of the df/dt inthe protection menu (1er stage in this example):

3

3/2/1/1/

dtdfdtdfdtdfdtaveragedf

++=

The second average value will be calculated basedupon the next detected three instantaneous values of

df/dt (fig.3) .This second average value will becompared to the threshold of the df/dt in theprotection menu (1er stage in this example):

3

3/2/1/2/

dtdfdtdfdtdfdtaveragedf

++=

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=*+,

1 2 3

CONFIGURATION

Menu:

df/dt: CYCLE NB=3

If both df/dt average1 and df/dt average2 exceed the threshold of the first elementof df/dt in the protection Menu,then the protection will opeate

However if only one of the average values exceeds the programmed threshold, thenthe protection function will not oparate since the VALIDATION Number forpositionning the protection (=2 ) is not reached.

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11. CONTROL FUNCTIONSTo gain access to the AUTOMAT.CTRL menu from the default display, press once and $ 5 times.

The accessible sub-menus are then indicated below :

AUTOMAT. CTRL

& & & &

$ TRIP OUTPUT RLY $ LATCH OUTPUTS $ BLOCKING LOG1 t $ BLOCKING LOG2 t $

" " " " "

And :

AUTOMAT. CTRL

& & &

$ AUX OUTPUT RLY $ LATCH OUTPUT AND LOGIC $ T DELAY $

" " RELAYS EQUAT " EQUATION "

And :

AUTOMAT. CTRL

& & $ INPUTS $

" "

CB SUPERVISION

11.1 "TRIP OUTPUT RLY" MenuThis sub-menu makes it possible to assign to the trip output contact (RL1) part or allthe selected time-delayed information.

In order to assign an information to the trip output contact, please go to the cellcorresponding to the selected information and press the # key. Select theconfiguration (YES or NO) with the

and&

keys. Validate with the#

key.

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=*+,

11.1.1 MiCOM P921 - P922 and P923 : common informationTo gain access to the AUTOMAT.CTRL menu from the default display, press once, $ 5 times (P921) or 6 times (P922 and P923) and once.

TRIP OUTPUT RLY Heading of the TRIP OUTPUT RLY menu

TRIP tV,which will be sent to the RL1 output contactRange : YES/NO

TRIP tV0>=

NO

Description : selection of the time-delayed information tV0>,which will be sent to the RL1 output contactRange : YES/NO

TRIP tV0>>=

NO

Description : selection of the time-delayed information tV0>>,which will be sent to the RL1 output contactRange : YES/NO

TRIP tV0>>>=

NO

Description : selection of the time-delayed information tV0>>>,which will be sent to the RL1 output contactRange : YES/NO

TRIP tAUX1 =

NO

Description : selection of the time-delayed information tAUX1,

which will be sent to the RL1 output contactRange : YES/NO

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TRIP tAUX2 =

NO

Description : selection of the time-delayed information tAUX2,which will be sent to the RL1 output contactRange : YES/NO

TRIP EQUATION A =

NO

Description : selection of the A logic equation result, which will besent to the RL1 output contact

Range : YES/NO

TRIP EQUATION B =

NO

Description : selection of the B logic equation result, which will besent to the RL1 output contactRange : YES/NO

11.1.2 Additional information for the MiCOM P922 MiCOM P923 relayTRIP tV2>=

NO

Description : selection of the time-delayed information tV2>,which will be sent to the RL1 output contactRange : YES/NO

TRIP tV2>>=

NO

Description : selection of the time-delayed information tV2>>,which will be sent to the RL1 output contactRange : YES/NO

TRIP tV1

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=*+,

11.1.3 Additional information for the MiCOM P923 relayTRIP df/dt1=

NO

Description : selection of the 1st stage of rate of change of frequency,which will be sent to RL1 output contactRange : YES/NO

TRIP df/dt2=

NO

Description : selection of the 2nd stage of rate of change offrequency, which will be sent to RL1 output contactRange : YES/NO

TRIP df/dt3=

NO

Description : selection of the 3rd stage of rate of change offrequency, which will be sent to RL1 output contactRange : YES/NO

TRIP df/dt4=

NO

Description : selection of the 4th stage of rate of change offrequency, which will be sent to RL1 output contactRange : YES/NO

TRIP df/dt5=

NO


TRIP df/dt6=

NO


TRIP EQUATION

C= NO

Description : selection of the "C" logic equation result which will besent to the RL1 output contactRange : YES/NO

TRIP EQUATION

D= NO

Description : selection of the "D" logic equation result which will besent to the RL1 output contactRange : YES/NO

11.2 "LATCH OUTPUTS" Menu11.2.1 Description

This sub-menu makes it possible to latch the information of any stage associated tothe trip output contact (RL1). The latched trip output contact will then be maintainedeven if the fault has disappeared, and as long as a reset will not be performed. Thereset can be done :

via a logic input (select UNLATCH in the list of available data, see INPUTSmenu 11.8),

via the local or remote communication link.In order to latch one information, please go to the relevant cell corresponding to theselected information, press then the# key. Select the configuration (YES or NO) withthe and& keys. Validate with the# key.

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11.2.2 MiCOM P921-MiCOM P922 and P923 : common informationTo gain access to the AUTOMAT.CTRL menu from the default display, press once, $ 5 times(P921) or 6 times(P922 and P923), once and $ once.

LATCH OUTPUTS Heading of the LATCH OUTPUTS menu

LATCH tV,which will be latched.Range : YES/NO

LATCH tV0>=

NO

Description :selection of the time-delayed information tV0>,which will be latched.Range : YES/NO

LATCH tV0>>=

NO

Description :selection of the time-delayed information tV0>>,which will be latched.Range : YES/NO

LATCH tV0>>>=

NO

Description :selection of the time-delayed information tV0>>>,which will be latched.Range : YES/NO

LATCH tAUX1 =

NO

Description :selection of the time-delayed information tAUX1,which will be latched.Range : YES/NO

LATCH tAUX2 =

NO

Description :selection of the time-delayed information tAUX2,which will be latched.Range : YES/NO

LATCH EQUATION A =

NO

Description :selection of the result of the A logic equation, whichwill be latched.Range : YES/NO

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=*+,

LATCH EQUATION B =

NO

Description :selection of the result of the B logic equation, whichwill be latched.Range : YES/NO

11.2.3 Additional information for the MiCOM P922 and P923 relayLATCH tV2>=

NO

Description :selection of the time-delayed information tV2>,which will be latched.Range : YES/NO

LATCH tV2>>=

NO

Description :selection of the time-delayed information tV2>>,which will be latched.Range : YES/NO

LATCH tV1

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11.2.4 Additional information for the MiCOM P923LATCH df/dt1 =

NO

Description :selection of the 1st stage of the rate of change offrequency, which will be latched.Range : YES/NO

LATCH df/dt2 =

NO

Description :selection of the 2nd stage of the rate of change offrequency, which will be latched.Range : YES/NO

LATCH df/dt3 =

NO

Description :selection of the 3rd stage of the rate of change offrequency, which will be latched.Range : YES/NO

LATCH df/dt4 =

NO

Description :selection of the 4th stage of the rate of change offrequency, which will be latched.Range : YES/NO

LATCH df/dt5 =

NO


LATCH df/dt6 =

NO


LATCH EQUATION

C = NO

Description :selection of the "C" logic equation which will belatched.Range : YES/NO

LATCH EQUATION

D = NO

Description :selection of the "D" logic equation which will belatched.Range : YES/NO

11.2.5 Example of configurationThe aim is :

Latching of the output contact RL1, which is linked to the tV> information.

Settings are :

select YES for the information which must be latched in the above menu : tV>,

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=*+,

11.3 "BLOCKING LOG1 t" Menu11.3.1 Description

The principle of the blocked overcurrent protection involves the use of start contactsfrom downstream relays (P121 or P122 for example) wired onto blocking inputs of

upstream relays (P921, P922 or P923 for example).

In the MiCOM P921 or P922-P923, the BLOCKING LOGIC1 t and BLOCKINGLOGIC2 t sub-menus allow the user to select time-delayed information, which willbe blocked by a dedicated logic input (see INPUTS sub-menu, BLOCK LOG1 orBLOCK LOG2 input).

In order to block one information, please go to the relevant cell corresponding to theselected information, press then the# key. Select the configuration (YES or NO) withthe and& keys. Validate with the# key.

11.3.2 MiCOM P921-P922 and P923 : common informationTo gain access to the BLOCKING LOG1 t sub-menu from the default display, press once, $ 5 times (P921) or 6 times (P922-P923), once and $ twice.

BLOCKING LOG1 t Heading of the BLOCKING LOGIC 1 sub-menu

BLOCK1 tV,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tV0>=

NO

Description :selection of the time-delayed information tV0>,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tV0>>=

NO

Description :selection of the time-delayed information tV0>>,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

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BLOCK1 tV0>>>=

NO

Description :selection of the time-delayed information tV0>>>,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tAUX1 =

NO

Description :selection of the time-delayed information tAUX1,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tAUX2 =

NO

Description :selection of the time-delayed information tAUX2,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

11.3.3 Additional information for the MiCOM P922 and P923 relayBLOCK1 tV2>=

NO

Description :selection of the time-delayed information tV2>,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tV2>>=

NO

Description :selection of the time-delayed information tV2>>,which will be blocked by energisation of the BLK LOG1 logic input.Range : YES/NO

BLOCK1 tV1

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=*+,

11.3.4 Additional information for the MiCOM P923BLOCK1 df/dt1 =

NO

Description :selection of the 1st stage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.Range : YES/NO

BLOCK1 df/dt2 =

NO

Description :selection of the 2nd stage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.Range : YES/NO

BLOCK1 df/dt3 =

NO

Description :selection of the 3rd stage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.Range : YES/NO

BLOCK1 df/dt4 =

NO

Description :selection of the 4th tage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.

Range : YES/NO

BLOCK1 df/dt5 =

NO

Description :selection of the 5th tage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.Range : YES/NO

BLOCK1 df/dt6 =

NO

Description :selection of the 6th tage of the rate of change offrequency which will be blocked by energisation of the "BLK LOG1"logic input.Range : YES/NO

11.3.5 Example of configurationThe aim is :

The user wants to block the first undervoltage stage if the logic input n2 is energised.

Settings are :

select YES for the information tV

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11.5 "AUX OUTPUT RLY" Menu11.5.1 Description

This sub-menu makes it possible to allocate to each individual output contact(excepted the watchdog and the trip output RL1) the information available in the

MiCOM relay. Instantaneous and time-delayed information can be then affected toone or many output contacts.

The available output contacts are :

MiCOM P921 : 3 output contacts, RL2 to RL4 (indicated by"432" in the following cells),

MiCOM P922 and P923 : 7 output contacts, RL2 to RL8 (indicated by"8765432" in the followingcells),

In order to assign one information to one output contact, please go to the relevant

cell corresponding to the selected information, press then the # key. Select theconfiguration (0 or 1) with the and& keys. Validate with the# key.

NOTE : if the information assigned to the trip output contact (RL1) hasbeen latched, all output contacts (RL2 to RL8) which are used toduplicate the trip output will be latched.

11.5.2 MiCOM P921, MiCOM P922 and P923: common informationTo gain access to the AUX OUTPUT RLY sub-menu from the default display, press once, $ 5 times(P921) or 6 times(P922 and P923), once and $ 4 times.

AUX OUTPUT RLY Heading of the AUX OUTPUT RLY menu

TRIP. CB : 8765432

0000000

Description :selection of the output contacts, which are used toduplicate the trip outputRange : 0 or 1 for each output contact

CLOSE CB : 8765432

0000000

Description :allocation of the CB Close information to the outputcontacts (this command comes from the remote communication).Range : 0 or 1 for each output contact

V< : 87654320000000

Description : allocation of the V

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=*+,

V : 8765432

0000000

Description : allocation of the tV>> information to the outputcontactsRange : 0 or 1 for each output contact

V>>> : 8765432

0000000

Description : allocation of the V>>> information to the outputcontactsRange : 0 or 1 for each output contact

tV>>> : 8765432

0000000

Description : allocation of the tV>>> information to the output

contactsRange : 0 or 1 for each output contact

V0> : 8765432

0000000

Description : allocation of the V0> information to the outputcontactsRange : 0 or 1 for each output contact

tV0> : 8765432

0000000

Description : allocation of the tV0> information to the outputcontactsRange : 0 or 1 for each output contact

V0>> : 87654320000000

Description : allocation of the V0>> information to the outputcontactsRange : 0 or 1 for each output contact

tV0>> : 8765432

0000000

Description : allocation of the tV0>> information to the outputcontactsRange : 0 or 1 for each output contact

V0>>> : 8765432

0000000

Description : allocation of the V0>>> information to the outputcontactsRange : 0 or 1 for each output contact

tV0>>> : 8765432

0000000

Description : allocation of the tV0>>> information to the outputcontactsRange : 0 or 1 for each output contact

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tAUX1 : 8765432

0000000

Description : allocation of the tAUX1 information to the outputcontactsRange : 0 or 1 for each output contact

tAUX2 : 8765432

0000000

Description : allocation of the tAUX2 information to the outputcontactsRange : 0 or 1 for each output contact

CB FAIL : 8765432

0000000

Description : allocation of the CB Fail information to the outputcontactsRange : 0 or 1 for each output contactNote : this information appears if the CB FAIL logic input is energised.

EQU. A : 8765432

0000000

Description : allocation of the Aequation result to the outputcontactsRange : 0 or 1 for each output contact

EQU. B : 8765432

0000000

Description : allocation of the Bequation result to the output

contactsRange : 0 or 1 for each output contact

11.5.3 Additional information for the MiCOM P922 and P923 relayV2> : 8765432

0000000

Description : allocation of the V2>information to the outputcontactsRange : 0 or 1 for each output contact

tV2> : 8765432

0000000

Description : allocation of the tV2>information to the outputcontactsRange : 0 or 1 for each output contact

V2>> : 8765432

0000000

Description : allocation of the V2>>information to the outputcontactsRange : 0 or 1 for each output contact

tV2>> : 8765432

0000000

Description : allocation of the tV2>>information to the outputcontactsRange : 0 or 1 for each output contact

V1< : 8765432

0000000

Description : allocation of the V1

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=*+,

tF1 : 8765432

0000000

Description : allocation of the tF1information to the output contactsRange : 0 or 1 for each output contact

F2 : 8765432

0000000

Description : allocation of the F2information to the output contactsRange : 0 or 1 for each output contact

tF2 : 8765432

0000000


F3 : 8765432

0000000


tF3 : 8765432

0000000

Description : allocation of the tF3information to the output contacts

Range : 0 or 1 for each output contact

F4 : 8765432

0000000


tF4 : 8765432

0000000


F5 : 8765432

0000000

Description : allocation of the F5information to the output contacts

Range : 0 or 1 for each output contact

tF5 : 8765432

0000000


F6 : 8765432

0000000


tF6 : 87654320000000


CB ALAR : 8765432

0000000

Description : allocation of the CB Alarminformation to the outputcontactsRange : 0 or 1 for each output contactNote : this information appears if one of the supervision thresholds isreached (ex : maximum number of operations).

F OUT OF RANGE: 8765432

0000000

Description : allocation of the F OUT OF RANGEinformation to theoutput contactsRange : 0 or 1 for each output contact

ACTIVE : 8765432

GROUP 0000000

Description : allocation of the ACTIVE GROUPinformation to theoutput contactsRange : 0 or 1 for each output contact

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11.5.4 Additional information for MiCOM P923 onlydf/dt1 : 8765432

0000000

Description : allocation of the df/dt1information to the outputcontactsRange : 0 or 1 for each output contact

df/dt2 : 8765432

0000000


df/dt3 : 8765432

0000000


df/dt4 : 8765432

0000000


df/dt5 : 8765432

0000000


df/dt6 : 8765432

0000000


EQU. C : 8765432

0000000

Description : allocation of the C equation result to the outputcontactsRange : 0 or 1 for each output contact

EQU. D : 8765432

0000000

Description : allocation of the D equation result to the outputcontactsRange : 0 or 1 for each output contact

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=*+,

11.6 "LATCH OUTPUT RELAYS" Menu11.6.1 Description

This menu makes it possible to latch the output contacts (RL2 to RL4 for MiCOMP921- and RL2 to RL8 for MiCOM P922 and P923) which are associated with one or

several stages, the latch is done by relay and not by functions.

The latched output contacts will then be maintained even if the fault has disappeared,and as long as a reset will not be performed. The reset an be done :

via a logic input (select "UNLATCH" in the list of available data, see "INPUTS"menu 11.8)

via a local or remote communication linkIn order to latch one output relay, please go to the relevant cell corresponding to theselected information, press then# key. Select the configuration (YES or NO) withand& keys. Validate with the# key.

11.6.2 MiCOM P921, MiCOM P922 and P923 : common informationTo gain access to the "LATCH OUTPUT RELAYS" submenu from the default display,press once, $ 5 times (P921) or 6 times (P922 or P923), once and $ 5 times.

LATCH OUTPUT

RELAYS

Heading of the LATCH OUPTU RELAYS menu

OUTPUT 2

NO

Description : selection of the output contact "RL2" to be latched.Range : YES/NO

OUTPUT 3

NO


OUTPUT 4

NO


Additional information for MiCOM P922 and MiCOM P923 relayOUTPUT 5

NO


OUTPUT 6

NO


OUTPUT 7

NO


OUTPUT 8

NO


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11.7 "AND LOGIC EQUATION" Menu11.7.1 Description

Two logical gates (AND) are available in the MiCOM P921 and P922 relays andfour are available in the MiCOM P923.

In order to assign one information to one logic equation, please go to the relevantcell corresponding to the selected information, press then the # key. Select theequation (A or B) with the $ and " key

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