Automatically switch

Automatically switchfrom the following three main parts:

(1) sensory components. Responsible for receiving circuit in the case of the anomaly or the operator, relay protection system signals through the transmission of action components to enable the implementation of components. Such as over-current or undervoltage release, such as release.

(2) transmission components. Responsible for power transmission, transformation, including the operation of institutions, transmission, free release agencies, such as the spindle.

(3) the implementation components. Automatically switch contact and interrupter system, mainly responsible for the access circuit and breaking the task.

The left photo shows the structure of the general principle of automatic switch which is in working condition. The three main contact and the locking rod through the transmission to keep closed, locking can rotate around the axis. When the circuit is in normal operation, the over-current release of the electromagnetic coil string although in the main loop, but can not be generated by suction so that armature movement, and only when the circuit short-circuit or overload occurs, the armature when the contract was rapid impact absorption lever to lock release, the main contact was the rapid opening of spring breaking the main circuit. In contrast, in normal operation, the undervoltage release coil electromagnetic because it is a parallel in the main circuit, the required voltage range so that the normal pull-keeper, at the same time to overcome the spring tension. When the circuit failure, low voltage (usually 70% of rated voltage or less) to reduce suction, armature by spring open and hit the lever to release locking, the main role of contact in the spring rapidly breaking the circuit.

the structure and principle of Automatically switches

1 the main contact; 2 transmission pole; 3 Lock; 4 axis;

5 lever; 6 Spring; 7 over-current release;

8 under-voltage release; 9 armature; 10 spring;

Case in a number of small-capacity automatic switch,exception with the short-circuit protection, also equipped with a double metal sheets which be made of release, when the circuit overload occurs, the dual-metal bending, open the lock, breaking contact circuit.