(1) High voltage switchgear should be combined with normal inspections under normal circumstances; (2) According to the change of the operation mode, the key temperature measurement should be carried out under the following conditions;

The load switch is a kind of switching device between the circuit breaker and the isolating switch. It has a simple arc extinguishing device, which can cut off the rated load current and a certain overload current, but cannot cut off the short-circuit current.

Load switches can be divided into high-voltage load switches and low-voltage load switches according to the voltage used.

(1) Domestic high voltage switchgear has been fully oil-free, and product upgrades represented by vacuum switches and SF6 circuit breakers have been realized.

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There are six main types of high-voltage load switches.