The fundamental difference between an isolation switch and a load switch

Let's talk about the high-voltage disconnector first! The structure of the high-voltage disconnector is simple, and it can be used to isolate the 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 high-voltage load switches! The high-voltage load switch is equipped with arc extinguishing by extinguishing, so it can cut off a certain load current and overload current. But it must be used with a high-voltage fuse, using the power of the fuse to eliminate the fault of a short circuit.

The high-voltage disconnector is a circuit that is mainly used to cut off the no-load current and isolate the power supply. In the case of opening, there is an obvious cut-off point, which comes to the safety monitoring of other electrical facilities. Normal load currents and short-circuit fault currents can be reliably used in the case of closing. Because there is no special arc extinguishing configuration, it is not possible to start, so the operation can only be carried out when the circuit has been cut off by the circuit breaker. Remember not to work with a load to avoid personal danger. The load switch is a kind of switching appliance on the isolation light, with a simple arc extinguishing configuration, which can disconnect a certain load current and current, but can not cut off the short-circuit current.

The fundamental difference between them is whether each unit can automatically trip the load through the thermal tripper during load.