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CIRCUIT BREAKERS

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Ground-Fault Protection

GC-200 Ground-Fault Relay System

GC-200 Ground-fault Relay System

The GC-200 Ground-fault relay system protects a grounded distribution system from low-level

arcing ground faults. The system includes the GC-200 relay, a sensor (current transformer) and

optional GC DSP display and is used with a bolted pressure switch or circuit breaker to open a

circuit upon detection of a ground fault.

GC-200 Relays Features

• Five models with sensitivities suitable for main, feeder or

branch circuits

• Adjustable Pickup and Time Delay settings

• I2t -- Inverse Time Characteristics

• ZSI -- Zone Selective Interlocking

• ZSI Push-to-Test with Signal Indication

• Two sets of Contacts (1 Form A ;10A@

120Vac. and 1 Form C; 5A@ 120Vac.N/O, 1 N/C)

• Auxiliary Trip Input Terminals

• Exter nal Battery Backup Connection

• Small non-metallic enclosure mounts on DIN rail

GC DSP Display (Optional) Features

• LCD Back Lit Display

• Surface (Panel) Mounted

• Local Display of System Parameters

• “Fine tuning” Adjustment of Ground Fault

Relay Settings

• Remote Testing of Ground Fault Relay

• Remote Resetting of Ground Fault Relay

Sensors

• Zero sequence sensing current transformers for all

phases and neutral

• Several sizes of toroids and rectangular CTs

• Many are split-core or open frame for ease of installation.

Catalogue Number Pickup Settings

GC-200D 30A 90A 90A 120A 150A 180A 210A 240A 270A 300A

GC-200E 120A 240A 360A 480A 600A 720A 840A 960A 1080A 1200A

Catalogue Number Time Delay Settings ( Sec )

All Types Inst. 0.10 0.20 0.30 0.40

Catalogue Number Descr iption Price

GC-200D 30A - 300A Relay

GC-200E 120A - 1200A Relay

GC-DSP** GC-200 Display

VW3A1104R10

1m display cable

VW3A1104R30

3m display cable

VW3A1104R5

5m display cable

VW3A1104R100 10m display cable

** Note: GC12 12’ cable shipped standard with GC DSP display

units.

Class 931, 940, 9600

T3B Toroid Sensor

GT912 Rectangular

Sensor

Relay

Catalogue

Number

Sensor

Catalogue

Number

Type

Ratio

Window Dimensions

Price

IN mm

GC200C

GC200D

T2A Toroid

1000:1

1.875 dia. 48 dia.

T3A Toroid 2.75 dia. 70 dia.

T3AS Toroid, split-core 2.625 dia. 67 dia.

T6A Toroid 5.75 dia. 146 dia.

T6AS Toroid, split-core 5.75 dia. 146 dia.

T9A Toroid 8.75 dia. 222 dia.

R713A

Rectangular

7.5 x 13.5 191 x 343

R417A 4.25 x 17.625 108 x 448

R826A 8 x 26.5 203 x 674

GC200E

All "A" type sensors above, plus:

RZ511

Rectangular ,

Open Frame

1000:1 4.5. x 11 114 x 280

RZ521 1000:1 4.5 x 21 114 x 534

RZ531 1000:1 4.5 x 31 114 x 788

RZ535 1000:1 4.5 x 35 114 x 890

RZ1011

Rectangular ,

Open Frame

1000:1 10.5 x 11 267 x 280

RZ1021 1000:1 10.5 x 21 267 x 514

RZ1031 1000:1 10.5 x 31 114 x 788

GT912

Rectangular ,

Open Frame

600:1 5.5 x 8.5 140 x 216

GT918 600:1 5.5 x 14.5 140 x 368

GT930 600:1 5.5 x 26.5 140 x 673

GT1218

Rectangular ,

Open Frame

600:1 8.5 x 14.5 216 x 368

GT1224 600:1 8.5 x 20.5 216 x 521

GT1230 600:1 8.5 x 26.5 292 x 673

GT1327 Rectangular,

Open Frame

600:1 9.5 x 24 241 x 610

GT1330 600:1 9.5 x 27 241 x 686

GT1530

Rectangular ,

Open Frame

600:1 11.5 x 26.5 292 x 673

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