SELECTION OF HIGH VOLTAGE LOAD SWITCH

First of all, it is necessary to understand the use environment. The high-voltage load switch is an electrical appliance whose function is between the high-voltage circuit breaker and the high-voltage isolation switch. The high-voltage load switch is often used in series with the high-voltage fuse; it is used to control the power transformer. The high-voltage load switch has a simple arc extinguishing device, because it can switch on and off a certain load current and overload current. However, it cannot disconnect the short-circuit current, so it is generally used in series with a high-voltage fuse for short-circuit protection.

Selection Notes:

1. Rated current, leave a margin of about 30%

2. Rated voltage: the same or higher than the actual voltage

3. The breaking current should be consistent with the design requirements

4. The operating frequency should preferably exceed the design requirements by about 10%

5. The volume conforms to the actual conditions of the site

6. Reliability, safety first

What is the main function of the high voltage load switch?

The high-voltage load switch is a special electrical appliance in the high-voltage circuit used to connect or disconnect the load current under the rated voltage. Although it has an arc extinguishing device, its arc extinguishing ability is weak, and it can only cut off and connect the normal load current, but cannot be used to cut off the short-circuit current. Under normal circumstances, the load switch is used in conjunction with a high-voltage fuse, and the fuse plays a short-circuit protection role.