gco over current relay

8/13/2019 GCO Over Current Relay

1/10

142

Over Current Relay

Trip. Trip DC

, . - .

This relay operates with time delay on current exceeding a given value. Time delay

varies inversly as current value and there are two kinds of the time characteristics,

inverse and very inverse.

This relay is used to open circuit breaker which is controlled by DC power source and is

suitable for protection against short circuit of the power line and overload of AC

equipment.

SPECIFICATION

Tap .

2

screw screw .

.

Lever , .

Lever 10 .

OPTION(ICS Unit)

Type

GCO - C4

GCO - C3

GCO - C2

GCO - C4

GCO - C3

GCO - C2

GCO - CD4

GCO - CD3

GCO - CD2

GCO - CD4GCO - CD3

GCO - CD2

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A3 - 8A

2 - 6A

2 - 6A

3 - 8A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

Inverse

Refer to page 150

Very Inverse

Refer to page 151

5A -

1.0A

0.5 / 2.0A

3.2

4.2

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap Range

Frequency

Color of case

Tap

Time characteristics RatingIIT Unit

ICS Unit(DC)

Figure Weight(kg)

DC current coil

DC voltage coil

AC current coil

AC voltage coil

0.2 / 2.0A, 0.5 / 2.0A, 1.0A

24V, 110V, 125V

0.5A, 1.0A, 2.0A

110V, 220V

Type of ICS coil Rating

OPERATING VALUE SETTINGWhen you set the operating current value of the relay, you

can change the value by movement of theTaplocation. And

after used the preparation connecting screw, must be

removed the old connecting screw, for the secondary circuit

of CT.

In case of the drawout type relay, setting the operating current

value after you draw the relay from the case.

TIME LEVER SETTING

You must decide the operation time before setting the timelever above the rotary disk. The time lever has initialized at 10

level, when the relay is shipped.

TYPE GCO - C (: Normally Open Contact)

DIMENSION

Refer to page 203


2/10

Induction Type Protective Relay_143

INTERNAL WIRING DIAGRAM

EXTERNAL WIRING DIAGRAM

: Aux. Relay TC TripAux. Relay .

Aux. Relay Aux Power(BP-BN) .

RAux. Power DC110V() ICS DC 1.0A = 50, 30W, ICSDC 0.5A = 100, 30W.

Non-Drawout Type Drawout Type

Trip

Trip

Trip


3/10

144

Over Current Relay With Instantaneous Unit

GCO-C

. , .

Operation and application are the same as type GCO - C except an indicating

instantaneous trip unit. It is possible to improve the time coordination between the

adjacent relays by using is instantaneous unit.

This relay is suitable for protection of generator, transmission line, distribution line and

motor.

SPECIFICATION

Tap.

2 screw screw.

.

OPTION(ICS Unit)

Type

GCO - CI4

GCO - CI39

GCO - CI3

GCO - CI2

GCO - CI4

GCO - CI39

GCO - CI3

GCO - CI2

GCO - CID4

GCO - CID39GCO - CID3

GCO - CID2

GCO - CID4

GCO - CID39

GCO - CID3

GCO - CID2

4 - 12A

3 - 9A

3 - 8A

2 - 6A

4 - 12A

3 - 9A

3 - 8A

2 - 6A

4 - 12A

3 - 9A3 - 8A

2 - 6A

4 - 12A

3 - 9A

3 - 8A

2 - 6A

2 - 6A

3 - 8A

3 - 9A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

3, 4, 5, 6, 7, 8, 9A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

InverseRefer to page 150

Very Inverse

Refer to page 151

5A 20 - 80A

1.0A

0.5 / 2.0A

3.5

4.3

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap Range

Frequency

Color of case

Tap


ICS Unit(DC)

Figure Weight(kg)

DC current coil

DC voltage coil

AC current coil

AC voltage coil

0.2 / 2.0A, 0.5 / 2.0A, 1.0A

24V, 110V, 125V

0.5A, 1.0A, 2.0A

110V, 220V

Type of ICS coil Rating

OPERATING VALUE SETTINGWhen you set the operating current value of the relay, you can

change the value by movement of theTaplocation. And after

used the preparation connecting screw, must be removed the

old connecting screw, for the secondary circuit of CT.In case of the drawout type relay, setting the operating current


TYPE GCO - CI ( : Normally Open Contact)

DIMENSION

Refer to page 203


4/10


: Aux. Relay TC TripAux. Relay .

Aux. Relay Aux Power(BP-BN) .

RAux. Power DC110V() ICS DC 1.0A = 50, 30W, ICSDC 0.5A = 100, 30W.

INTERNAL WIRING DIAGRAM

EXTERNAL WIRING DIAGRAM

Trip

Trip

Trip Trip

When it is used for KEPCO(Korea Electric Power Corporation), must be selected the relay of GCO - C I D 4 and/or GCO - C I D 4 with theinternal wiring diagram for KEPCO.

Lever ,

.

Lever 10 .

TIME LEVER SETTINGYou must decide the operation time before setting the time

lever above the rotary disk. The time lever has initialized at 10



5/10

146

Over Current Relay

INTERNAL WIRING DIAGRAM EXTERNAL WIRING DIAGRAM

GCO - C

. .

Operation and application are the same as type GCO - C. This

relay is used when a normally open without other powersource is necessary.

SPECIFICATION

TYPE GCO - CH ( : Normally Open Contact)

Tap .

2

screw screw .

.

Lever , .

Lever 10.

Type

GCO - CH4

GCO - CH3

GCO - CH2

GCO - CH4

GCO - CH3

GCO - CH2

GCO - CHD4

GCO - CHD3

GCO - CHD2

GCO - CHD4

GCO - CHD3

GCO - CHD2

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

2 - 6A

3 - 8A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

Inverse

Refer to page 150

Very Inverse

Refer to page 151

5A -

2.0A

2.0A

4.0

5.0

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap RangeFrequency

Color of case

Tap


ICS Unit(AC)

Figure Weight(kg)


change the value by movement of the Taplocation. And

after used the preparation connecting screw, must be removed

the old connecting screw, for the secondary circuit of CT.



TIME LEVER SETTING




6/10




GCO - CH . Operation and application are the same as type GCO - CH,

except an indicating instantaneous trip unit.

SPECIFICATION

TYPE GCO - CIH ( : Normally Open Contact)

Tap .

2

screw screw .

.

Lever , .

Lever 10 .

Type

GCO - CIH4

GCO - CIH3

GCO -CIH2

GCO - CIH4

GCO - CIH3

GCO - CIH2GCO - CIHD4

GCO - CIHD3

GCO - CIHD2

GCO - CIHD4

GCO - CIHD3

GCO - CIHD2

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

2 - 6A

3 - 8A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

Inverse

Refer to page 150

Very Inverse

Refer to page 151

5A 20 - 80A

2.0A

2.0A

4.0

5.0

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap RangeFrequency

Color of case

Tap


ICS Unit(AC)

Figure Weight(kg)







TIME LEVER SETTING




7/10

148

Over Current Relay


GCO - C . DC Trip

Magnet .

Operation and application are the same as type GCO - C. This

relay is specially designed for circuit breaker, to trip under novoltage, where DC power source is not available.

SPECIFICATION

TYPE GCO - ON (: Normally Open Contact)

Tap .

2

screw screw .

.

Lever , .

Lever 10.

Type

GCO - ON4

GCO - ON3

GCO - ON2

GCO - ON4

GCO - ON3

GCO - ON2

GCO - OND4

GCO - OND3

GCO - OND2

GCO - OND4

GCO - OND3

GCO - OND2

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

2 - 6A

3 - 8A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

Inverse

Refer to page 150

Very Inverse

Refer to page 151

5A -

2.0A

2.0A

3.6

4.6

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap RangeFrequency

Color of case

Tap


ICS Unit(AC)

Figure Weight(kg)







TIME LEVER SETTING




8/10




GCO - ON . Operation and application are the same as type GCO - ON,

except an indicating instantaneous trip unit.

SPECIFICATION

TYPE GCO - ONI (: Normally Open Contact)

Tap .

2

screw screw .

.

Lever , .

Lever 10 .

Type

GCO - ONI4

GCO - ONI3

GCO - ONI2

GCO - ONI4

GCO - ONI3

GCO - ONI2GCO - ONID4

GCO - ONID3

GCO - ONID2

GCO - ONID4

GCO - ONID3

GCO - ONID2

4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A4 - 12A

3 - 8A

2 - 6A

4 - 12A

3 - 8A

2 - 6A

2 - 6A

3 - 8A

4 - 12A

2, 3, 4, 5, 6A

3, 4, 5, 6, 8A

4, 5, 6, 7, 8, 10, 12A

60Hz(standard)

50Hz(option)

Munsell No N 1.5

Inverse

Refer to page 150

Very Inverse

Refer to page 151

Inverse

Refer to page 150

Very Inverse

Refer to page 151

5A 20 - 80A

2.0A

2.0A

4.0

5.0

Non-Drawout

()

Drawout

()

GCO - Unit

Tap Range

Tap RangeFrequency

Color of case

Tap


ICS Unit(AC)

Figure Weight(kg)







TIME LEVER SETTING




9/10

150

TIME & CURRENT CHARACTERISTICS

TYPE : GCO- C4, CD4- C3, CD3

- C2, CD2

TYPE : GCO - CI4, CID4

- CI39, CID39

- CI3, CID3

- CI2, CID2

TYPE : GCO - CH4, CHD4

- CH3, CHD3

- CH2, CHD2

TYPE : GCO - CIH4, CIHD4

- CIH3, CIHD3

- CIH2, CIHD2

TYPE : GCO - ON4, OND4

- ON3, OND3

- ON2, ONID2

TYPE : GCO - ONI4, ONID4

- ONI3, ONID3

- ONI2, ONID2

(OCR)

GCO - CID4

DC 0.5 / 2.0A

60Hz

Floating

GCO - C GCO - CI

GCO - CH GCO - CIH

GCO - ON GCO - ONI

: Lever1Tap5%

: 10%

5% () Lever10 2000%

2.2 0.4

T2 / T20 : 3~4.5

T3 / T5 : 1.2~1.8

() 200%

50ms

0% 20

70~90%

(, ) : 202010%

(, ) : 5% () : 5%

() : , , , 5

() : 10%

10M

10M

5M

AC 2000V, 1

AC 2000V, 1

AC 1000V, 1

: 16.7Hz : 0.4mm

: 10 : 30g(300m/s2)

: , , , : 2

Tap40

1, 1 2,

Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10

input

300%

500%

1000%

time(sec)

5.10

3.75

2.86

error

12%

7%

7%


10/10

InductionTypeProtectiveRelay 151

TIME & CURRENT CHARACTERISTICS

(OCR)

GCO - CID4

DC 0.5 / 2.0A

60Hz

Floating

GCO - C GCO - CI

GCO - CH GCO - CIH

GCO - ON GCO - ONI

: Lever1Tap 5%

: 10%

5% () Lever10 2000%

1.2 0.2

T2 / T20 : 10~15

T3 / T5 : 1.8~2.6

() 200%

50ms

0% 60

70~90%

(, ) : 2020 10%

(, ) : 5% () : 5%

() : , , , 5

() : 10%

10M

10M

5M

AC 2000V, 1

AC 2000V, 1

AC 1000V, 1

: 16.7Hz : 0.4mm

: 10 : 30g(300m/s2)

: , , , : 2

Tap40

1, 1 2 ,

Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10Time - Lever #10

input

300%

500%

1000%

time(sec)

6.33

2.83

1.60

error

12%

7%

7%

TYPE : GCO - C4, CD4- C3, CD3

- C2, CD2

TYPE : GCO - CI4, CID4

- CI39, CID39

- CI3, CID3

- CI2, CID2

TYPE : GCO - CH4, CHD4

- CH3, CHD3

- CH2, CHD2

TYPE :GCO - CIH4, CIHD4- CIH3, CIHD3

- CIH2, CIHD2

TYPE :GCO - ON4, OND4

- ON3, OND3

- ON2, ONID2

TYPE :GCO - ONI4, ONID4

- ONI3,ONID3

- ONI2,ONID2

Levern 10

= 100(%)

T10 :

Tn : n

, n =

10

Tn - n T1010T10

gco over current relay

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