Based on international advanced concepts, with world-class production,testing methods,laser welding,laser cutting and hellumleak detection equipment;
The primary components of the product are fully sealed in stainless-steel-plate-welded sealed gas tank, filed with SF6 gas at acertain pressure as the insulating medium, and its protection grade is lP67 to prevent any influence from external environmentsand climate to the switchgear cabinet: it can run reliably in basement, plateau, tundra, coastal, humid and other harshenvironments without maintenance.
The product can be actuated manually or electrically, and the actuator is mature and reliable with complete mechanical andelectrical interlocks to effectively prevent personal injury and equipment damage due to any error in operation.
The product is compact, compared with traditional air-insulated switchgear, it is significantly smaller and the floor area occupiedis less by 30％-70% to improve space utilization efficiency and effectively reduce comprehensive engineering cost.The protection and system technology based on microprocessor combines protection, control, metering, detection andcommunication functions to make the power distribution network automatic and digital without personnel on duty.

Item	Unit	Parameter
Rated voltage	kV	12 24 40.5
Rated frequency	Hz	50
Rated current	A	630/1250/2500/3150/4000/630/1250/2500
Power frequency withstand voltage (phase-to-phase and phase-to-ground)	kV	42 65 95
Power frequency withstand voltage (insulation breaking)	kV	48 79 118
Lightning impulse withstand voltage (phase-to-phase and phase-to-ground)	kV	75 125 185
Lightning impulse withstand voltage (insulation breaking)	kV	85 145 215
Rated power frequency withstand voltage of auxiliary circuit	kV	2
Rated instantaneous withstand current	kA	25/31.5/40
Rated short-circuit period	s	3
Rated peak withstand current	kA	63/80/100 63/80/100 50/63/80
Rated short-circuit breaking current of circuit breaker	kA	25/31.5/40 25/31.5/40 25/31.5
Rated short-circuit closing current of circuit breaker (peak)	kA	63/80/100 63/80/100 50/63/80
Rated cable charge breaking current	A	25
Rated operating sequence		O-0.3s-CO-3min-CO
Insulation gas		SF6
Mechanical life	Time	10000
Three-position switch	Time	5000
Rated charge pressure (abs, 20°C)	Mpa	0.14
Minimum charge pressure (abs, 20°C)	Mpa	0.12
Sealed enclosure	Grade	IP67
Switch shell	Grade	UP4X
Annual relative leak rate of dry air	%/year	≤0.1
Rated power voltage of auxiliary circuit	V	DC48/110/220 AC220

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