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Ground-fault Protection

GC-200 Ground-fault Relay System

Class 931, 940, 960

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. (Replaces GC-100 relay.)

GC-200 Relay Features

●	Five models with sensitivities suitable for main, feeder, or branch circuits

●	Ten adjustable pickup settings for each model

●	Small, non-metallic enclosure mounts on DIN rail

●	10 A and 5 A output contacts for trip and alarm

●	Accepts sensors from both Square D and Federal Pioneer relays

●	Zone-selective interlocking (ZSI) to optimize coordinated systems

●	I2t inverse time characteristics

 

GC DSP Display (Optional)

●	Real-time display of ground-fault values

●	Also recalls ground-fault at last trip or at maximum since reset

●	Allows remote testing or resetting of the relay

●	LCD back-lit display

●	Surface mounts over panel meter cutout

●	Fine adjust pickup settings (D and E versions only)

 

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

 

Cat. No.	Adjustable Pickup Settings (in Amperes)
GC200A	0.03	0.06	0.09	0.12	0.15	0.18	0.21	0.24	0.27	0.3
GC200B	0.3	0.6	0.9	1.2	1.5	1.8	2.1	2.4	2.7	3
GC200C	3	6	9	12	15	18	21	24	27	30
GC200D	30	90	90	120	150	180	210	240	270	300
GC200E	120	240	360	480	600	720	840	960	1080	1200

 

Cat. No.	Description	Specifications	$ Price
GC200A	Ground-fault relay	30 mA–300 mA	1973.00
GC200B		300 mA–3.0 A	1973.00
GC200C		3.0 A–30.0 A	1973.00
GC200D		30.0 A–300 A	1973.00
GC200E		120 A–1200 A	1973.00
GCDSP	Display module		632.00
GC4	Display cable	4 feet	64.00
GC12a		12 feet	105.00
GC30		30 feet	201.00

a	One GC12 twelve foot cable is included with GCDSP display modules.

Relay Cat. No.	Sensor Cat. No.	Type	CT Ratio	Window Dimensions		$ Price
				in	mm
GC200A	T2B	Toroid	700:1	1.875 dia.	48 dia.	1364.00
	T3B			2.75 dia.	70 dia.	1806.00
	T5B			4.625 dia.	117 dia.	2524.00
GC200B GC200C GC200D	T2A	Toroid	1000:1	1.875 dia.	48 dia.	469.00
	T3A	Toroid		2.75 dia.	70 dia.	516.00
	T6A	Toroid		5.75 dia.	146 dia.	516.00
	T6AS	Toroid, split-core		5.75 dia.	146 dia.	884.00
	T9A	Toroid		8.75 dia.	222 dia.	737.00
	R713A	Rectangular		7.5 x 13.5	191 x 343	2042.00
	R417A			4.25 x 17.625	108 x 448	2433.00
	R826A			8 x 26.5	203 x 674	2964.00
GC200E	All "A" type sensors above, plus:
	RZ511	Rectangular, Open Frame	1000:1	4.5. x 11	114 x 280	1276.00
	RZ521		1000:1	4.5 x 21	114 x 534	1503.00
	RZ531		1000:1	4.5 x 31	114 x 788	1804.00
	RZ535		1000:1	4.5 x 35	114 x 890	1889.00
	RZ1011	Rectangular, Open Frame	1000:1	10.5 x 11	267 x 280	1633.00
	RZ1021		1000:1	10.5 x 21	267 x 514	2050.00
	RZ1031