Two-column three-phase AC outdoor HV switchgear

Outdoor high-voltage AC isolation switch (hereinafter referred to as "isolation switch") is an outdoor high-voltage switch with a rated frequency of 50Hz, which is used for the replacement of 35kV high-voltage lines under the condition of voltage and no load, and for the electrical isolation of high-voltage bus bars, circuit breakers and other electrical equipment to be repaired and live high-voltage lines. It can also be used to split small capacitive and inductive currents.

General:

Service Environment

Altitude: not more than 1000m, if the altitude is higher than 1000m, the rated insulation level should be corrected accordingly;
Ambient temperature: upper limit +45℃, lower limit -40℃, the average temperature of the hottest month 30℃, the maximum daily temperature difference 25K;
Solar radiation intensity (outdoor) : 0.1W/cm2;
Wind speed/wind pressure (outdoor) : 34m/s (700Pa);
Pollution grade: e;
Ice thickness: ≤20mm;
Humidity: average daily relative humidity ≤95%, average monthly relative humidity ≤90%;
Earthquake resistance: horizontal acceleration 0.3m /s2, vertical acceleration 0.15m /s2;
Safety factor: sinusoidal resonance three cycles, safety factor above 1.67.

Key Feature

The isolation switch is composed of a base, an insulating pillar, a conductive part and an operating mechanism
The isolation switch is a single-pole type, and the three poles can also be connected into a three-pole type that can be linked through a connecting rod
With CS11 or CS8~6D manual mechanism operation
The two switch has reasonable structure and flexible operation

Technical Data

Name		Unit	Data
Rated voltage		kV	40.5
Rated frequency		Hz	50
Rated current		A	630	1250	2000	2500	3150	4000
Rated short-time withstand current		kA	20/25	25/31.5	31.5		40/50
Rated short-time withstand current（peak）		kA	50/63	63/80	80		100/125
Rated short-time power frequency withstand voltage		kV/min	95/1（phase to phase、to earth，dry）
			118/1（phase to phase、to earth，dry）
			95/1（phase to phase、to earth，wet）
Rated lightning impulse withstand voltage		kV	185（phase to phase、to earth）
			215（open contact）
Rated short-time withstand current duration		S	4（disconnecting switch）、2（earthing switch）
Main loop residence		μΩ	≤100		≤80
Creep age distance		mm	≥1256（Class e anti-fouling）
Equipped with operating mechanism	Manual operation mechanism		CS14G(no earthing switch)
			Main cutter CS14G, ground cutter CS11(with single/double ground switch)
	Motor operating mechanism		CJ6 type, motor voltage AC380V or DC220V, control voltage AC220V or DC220V, auxiliary contact 8 normally open 8 normally closed (standard)
Mechanical life		Times	5000（disconnecting switch/earthing switch）