The Fundamental Difference Between Isolating Switches And Load Switches

Let's talk about High Voltage Disconnect Switch first! The structure of the high-voltage isolating switch is simplified. It can be used to isolate high-voltage power supply to ensure the safety inspection of other equipment. However, it does not have a special arc extinguishing configuration, so it is not allowed to operate with load. Now let's talk about the high-voltage load switch! The high-voltage load switch is equipped with an arc extinguishing configuration, so it can cut off a certain load current and overload current. But it must be used with a high-voltage fuse to eliminate the short-circuit fault with the power of the fuse.

The high-voltage isolating switch is mainly used to cut off the circuit of no-load current and isolate the power supply. In the case of opening, there is an obvious cut-off point to monitor the safety of other electrical facilities. In the case of closing, normal load current and short-circuit fault current can be used reliably. Because there is no special arc extinguishing configuration, it cannot be opened, so the operation that can be performed is only when the circuit has been cut off by the circuit breaker. Remember not to work with load to avoid personal danger. The load switch is a switching device on the isolation switch, with a simple arc extinguishing configuration, which can disconnect a certain load current and current, but cannot disconnect the short-circuit current.

The fundamental difference between them lies in whether each household device can automatically trip the load through the thermal release when under load.