GW13 Disconnector Switch Neutral Point Grounding protection Device

The GW13 series transformer neutral point gap grounding protection device produced by Lugao is designed to protect the insulation of the transformer neutral point from lightning overvoltage, switching overvoltage and power frequency (transient) overvoltage. Lugao has professional production equipment and rich export experience, and the inventory held can be delivered quickly.

Model:GW13

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Product Description

Lugao's GW13 series transformer neutral point overvoltage protectors are primarily used in the neutral point circuits of 110kV and 220kV power transformers. They protect the transformer's neutral point insulation from overvoltage damage and enable the transformer to switch between grounded and ungrounded neutral point operation modes. When simultaneous protection against lightning, power frequency, and switching overvoltages is required, a gap and arrester can be connected in parallel for protection. The GW13 series neutral point overvoltage protector is a complete set that integrates a disconnector, zinc oxide arrester, discharge gap, and current transformer. It features high thermal capacity and excellent protection, flexible configurations, and ease of use. A pure gap design or a combination of disconnector and discharge gap can be selected to meet user needs.

GW13 protection Device Technical Specifications

ltem		Unit	Argument
Product model			Lugao-GW13-110	Lugao-GW13-220
Rated voltage		KV	110	220
Transformer neutral withstand voltage	Lightning full and cut withstand voltage (peak)	KV	250	400
Transformer neutral withstand voltage	1min power frequency(effective value)	KV	95	200
Neutral isolating switch	Rated current	A	630	630
Neutral isolating switch	Operating mechanism		CS14G(manual) or CJ2(electric)
Zinc oxide arrester	Rated voltage (RMS)	KV	72	144
	Continuous operating Voltage	KV	58	116
	Dc 1mA reference voltage	KV	103	205
	Residual voltage of lightning impulse current	KV	186	320
Discharge gap	Gap electrode distance range	mm	90-150	220-320
	Power frequency discharge voltage range	KV	50-83	100-166
	1.2/50us impulse discharge voltage	KV	120-190	250-320
Current transformer	Type		Epoxy resin poured fully enclosed pillar type 10kv
Current transformer	Transformation ratio		100/5,200/5,300/5.40015.50015.600/5