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Air switch is the use of air as an insulating medium and an arc medium switch, and its role is to disconnect the circuit in the short circuit, the protection of electrical equipment in the circuit. Air switch in the application of the circuit through the switch circuit to complete, When the short circuit occurs, the air switch will trip to disconnect the circuit.

Air switch tripping in three ways, that is, thermal tripping, electromagnetic tripping and multiple tripping, the tripartite method of operation of the three principles are different, but can achieve the purpose of cutting off the power.

1, the thermal switch thermal switch

Air switch overload in the line, the internal thermal components installed in the role of over-current generated heat, when the heat conduction to the air switch in the bimetal position will make the metal heated tilt, the formation of the hook Driving force, and will be detached from the lock, cut off the main contact to the role of tripping.

2, the air switch electromagnetic trip

The electromagnetic trip of the air switch is accomplished by the suction produced by the electromagnetic release. When the current overload is serious in the circuit, the current through the electromagnetic release will exceed the set value, so that the suction produced by the electromagnetic release So that the armature will impact the lever under the action of the suction force so that the buckle and the lock catch are disengaged and the lock catch is separated from the main contact of the switch under the action of the spring.

3, the air switch of the double-trip

Air switch is used to complete the double tripping tripping tripping mechanism action. Air switch used in the tripping mechanism is actually a set of connecting rod device, usually the main contact is closed, the lock in the closing position, when the line In the event of a fault, the release releases the latch and breaks the main contact.