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Circuit Breakers High-voltage circuit breakers, and low-voltage circuit breakers are an electrical protection device, and its type is very much with an arc extinguishing device

The full name of the air switch is an air type low voltage circuit breaker belonging to the circuit breaker which is mainly used in low voltage circuit,

Because it is through the air as a medium for the arc so called air-type low-voltage circuit breaker referred to as air switch, we usually home building power distribution is basically the air switch

Isolated switch is a high voltage switchgear mainly used in high voltage circuit

It is a no arc device switch device, mainly used to disconnect the no-load current circuit, isolated power supply, in the sub-gate when there is a clear disconnect point to ensure the safety of other electrical equipment maintenance. In the closed state can be reliably through the normal load current and short circuit fault current. Because it does not have a special arc extinguishing device, can not cut off the load current and short circuit current. Therefore, the disconnector can only be in the circuit has been broken when the circuit breaker to operate, is strictly prohibited with the load operation, so as to avoid serious equipment and personal accidents. Only the voltage transformer, arrester, the excitation current does not exceed 2A no-load transformer, the current does not exceed 5A of the no-load lines, in order to use the isolation switch for direct operation.

Most of the power applications are used in conjunction with circuit breakers and disconnectors, with the circuit breaker, load (fault) current, with the isolation switch to form a clear point