Audited Supplier
Outdoor vacuum disconnecting load switch (short for load switch) is outdoor HV switchgear with three-phase AC 50Hz,rated voltage12/40.5kV. It is used for switching on/off load current in city or country distribution systems or breaking transfer currentof fuses. Matching with motor mechanism and controller, it can be used as a section switch or sectionalize.
Ambient temperature :+40ºC~-40ºC, daily temperature difference :25K;
Altitude: no more than 2000 meters;
Wind pressure does not exceed 700Pa(equivalent to 34m/s wind speed);
Amplitude: no frequent violent movement, seismic intensity does not exceed 8 degrees.
Air pollution level 3;
Condensation may occur during periods of high humidity when the temperature drops;
Not applicable to places with fire, explosion, chemical corrosion and violent vibration.
Using vacuum arc extinguishing chamber, no explosive danger.
The isolation knife is connected with the three-phase vacuum interrupter, and there is an obvious isolation fracture when the brake is opened.
Can pull the brake with load, safe and reliable, long electric life.
All parts of the body are made of stainless steel, and the bottom frame is made of stainless steel or carbon steel with hot dip galvanizing and ultraviolet protection coating to ensure the normal operation of the body in the outdoor environment.
The installation mode is double rod type, electric operation is the main, and manual or remote control operation can also be used.
Widely used in rural urban network, railway and other configuration power line transformation.
| Name | Unit | Data |
| Rated voltage | kV | 40.5 |
| Rated frequency | Hz | 50 |
| Rated current | A | 1250 |
| Rated active load breaking current | A | 1250 |
| Rated loop breaking current | A | 1250 |
| 5%Rated active load breaking current | A | 62.5 |
| Rated cable charging breaking current | A | 25 |
| P.f withstand voltage for 1min: Across vacuum open contacts.between phases, phase to earth /across open contacts | kV | 68/95/110 |
| Lightning impulse withstand voltage : between phases.phase to earth /across open contacts | kV | 185/215 |
| Rated short time withstand current | kA | 25 |
| Rated short circuit duration | s | 4 |
| Rated peak withstand current | kA | 63 |
| Rated short circuit making current | kA | 63 |
| Mechanical endurance | times | 10000 |
| Allowable wear thickness of contact of vacuum interrupter | mm | 0.6 |
| Operating torque | Nm | ≤300 |
