Gas insulated switchgear (Switchgear) | Reliable Power Distribution

XGW-12KV environmental protection gas insulated ring main unit / primary and secondary fusion complete sets of ring main unit

Gas insulated switchgear (Switchgear)

The Gas insulated switchgear is an integrated power device specifically designed for urban distribution networks. It incorporates a clean air or nitrogen (eco-friendly gas) ring network cabinet, current transformers, voltage transformers, an automated station terminal (DTU), and indicating instruments into a mobile, sealed, moisture-proof, and condensation-proof enclosure. This design significantly shortens the construction period and enhances the operational reliability of urban power grids.

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Feature

Modular Design: It can use unit cabinets or shared box schemes, supporting various combinations such as two in two out, two in four out, and can even customize more unit combinations based on user requirements.

Diverse Outer Box Materials: The outer box can be made from stainless steel, spray-painted cold-rolled steel, or GRC materials. It can also be customized to create landscape-style or printed-pattern outer boxes, facilitating integration with the surrounding environment.

Standardized Performance: The dimensions and performance indicators meet the requirements of IEC 466, which specifies the rated voltage of above 1KV and below 38KV for AC insulated enclosed switchgear and control equipment.

Eco-friendliness and Safety: The product features advantages such as low carbon emissions, eco-friendliness, reliability, safety, and compactness, meeting the needs of modern urban development.

Parameter

Switchgear model			Circuit breaker cabinet	Load switchgear
Projects		Unit	Value
Rated voltage		kV	12
Rated frequency		Hz	50 60
Rated current		A	630 1250
Arc extinguishing method		/	Vacuum
Insulation method		/	Pure air/pure nitrogen (Note: Pure air/pure nitrogen refers to the preparation of synthetic high-purity air or nitrogen with a moisture content of less than 15ppm)
Rated power frequency	To the ground, interphased	kV	42
withstand voltage	Between the fractures	kV	48
Rated lightning impulse	To the ground, interphased	kV	75
withstand voltage	Between the fractures	kV	85
Short-term	Main circuit	kA/s	20/4 25/4
withstand current	Ground loop	kA/s	17.4/2
Rated peak	Main circuit	kA	50 63
withstands current	Ground loop	kA	43.5
Rated short-circuit making current (peak)		kA	50 63
Rated short-circuit breaking current		kA	20 25	/
Rated breaking times of short-circuit breaking current, E2 level		Times	30	/
Circuit breaker unit rated operating sequence		/	0-0.3s-C0-180s-C0	/
Rated cable/line charging breaking test		/	C2 class	/
Different phases earth fault breaking current		kA	17.4	/
Rated active load breaking current		A	/	630
Rated closed-loop breaking current		A	/	630
Rated cable charging breaking test		A	/	10
5% rated active load switch breaking current		A	/	31.5
The making and breaking times of the earthing switch		Times	5 (Note: XGN118C-12, XGN118D-12 series of lower separation height grounding scheme is 2 times)
Loop resistance		μΩ	≤140
Rated gas pressure (20°C gauge)		Mpa	0.02
Minimum operating gas pressure		MPa	0
Mechanical life	Circuit breakers/load switches	Times	10000 30000
	Disconnector	Times	3000 6000
	Grounding switch	Times	3000 6000
Ingress protection	Airbox	/	IP67
	enclosure	/	IP4X
Rated annual air leakage rate		%	0.01
Resistant to internal arc faults		kA/s	20/0.5(20/1) 25/0.5(25/1)
The moisture content in the airbox		ppm	≤150

Environmental conditions of use
1. Ambient temperature: upper limit +55°C, lower limit -40°C.
2. Altitude: no more than 3000m.
3. Relative humidity: the daily average value < 95%, the monthly average value ≤ 90%.
4. Water vapor pressure: daily average ≤ 22kPa; The monthly average ≤ 1.8kPa.
5. Workplace: The surrounding air is not visibly polluted by dust, smoke, corrosive and/or combustible gas, steam or salt spray; There is no fire explosion, serious pollution, serious chemical corrosion and severe vibration.
6. The amplitude of electromagnetic interference induced in the secondary system ≤ 1.6kV.
7. Note: When the altitude is greater than 3000m or under special use conditions, customized product solutions are required.