As the country's electrified railways have put forward new and higher requirements for switchgear such as miniaturization, intelligence, maintenance-free, and full working conditions, our company independently developed the high-performance, high-quality GSR6-27.5 series environmentally friendly gas-insulated metal-enclosed switchgear (G-GIS) uses dry air (D-air) as the insulating medium and integrates vacuum arc extinguishing technology, APG solid sealing technology, and gas a new generation of green and environment-friendly railway medium-voltage switchgear integrating insulation technology and interface insulation technology. The product has passed the type test verification and new product technical appraisal of the national authoritative testing agency, and has obtaineed a number of national invention patents and utility model patents. It has independent intellctual property rights. The product solution is mainly suitable for electrified railway systems with single-phase or two-phase, rated voltage 27.5kV and a maximum voltage of 31.5kV, such as high-speed railways, passenger dedicated lines and other high-level railways fields.

The product has a modular design, and the solution can be flexibly combined according to the needs of railway users. The product adopts a sealed pressure system. All high-voltage live parts of the main circuit are sealed in a stainless steel gas tank and are not affected by the environment. It has the characteristics of intelligence, reliable operation, small size and maintenance-free.

Technical Parameters

Item		Unit	Parameter
Rated voltage		kV	1*31.5	2* 31.5
Rated frequency		Hz	50
Lightning impulse withstand voltage	Pole to pole, circuit breaker break	kV	200	200
	Pole to pole		/	325
	Isolation fracture		220	220
Main circuit power frequency withstand voltage (1min)	Pole to pole, circuit breaker break	kV	95	95
	Pole space		/	140
	Isolation fracture		118	118
Insulating medium			Dry air
Inflatable compartment zero gauge pressure 5min power frequency Withstand voltage			1.3Ur
Main busbar and feeder rated current		A	1250, 1600, 2000, 2500
Rated short-time withstand current, duration		kA/s	31.5/4
Rated peak withstand current, grounding switch closing current		kA	80
Internal arc withstand capability AFL		kA/s	31.5/1
Protection level	Inflatable box		IP65
	Switch cabinet		IP54
Rated inflation pressure (20℃ gauge pressure)		MPa	0.04
Annual air leakage rate		%	≤0.1

Product dimensions

Specifications

Rated current

Width (mm)

Depth (mm)

Height (mm)

Remarks

Signle pole/

Doubl poles

≤1250A

600

1900

2600

The specific cabinet depth is designed

according to the solution

1250-2500A

900

1900

2600