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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.
Altitude: not more than 1000m, if the altitude is higher than 1000m, the rated insulation level should be corrected accordingly;
Ambient temperature: upper limit +45ºC, lower limit -40ºC, the average temperature of the hottest month 30ºC, 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.
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
| 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) | ||||||
