What are the ways to disconnect circuit breakers?

Circuit breakerIt can be divided into distribution protection type and motor protection type. The distribution protection type is suitable for power distribution, the motor protection type is suitable for motor front-end protection, and there are also generator protection types.

The tripping of circuit breakers is generally divided into the following types:

Thermal magnetic release: It includes two functions: thermal release and electromagnetic release.Hot releaseIt is driven by the bimetallic strip overcurrent delay heating deformation to push the trip transmission mechanism; Magnetic disengagement is achieved by instantaneously pushing the armature to trip through the short-circuit current of the electromagnetic coil. The advantages are stable performance and not affected by voltage fluctuations, long lifespan, and relatively affordable price; The disadvantage is that it can only provide two-stage protection (short circuit and overload), with relatively large action value errors, low sensitivity, difficult to set, and slow action. (Suitable for overload protection)

Electronic release:It can have all the functions of thermal magnetic release mentioned above and can be conveniently adjusted. An electronic release is a circuit composed of electronic components that detects the main circuit current, amplifies, and drives the release mechanism. The advantage is that it can provide three-stage or even four stage protection (LISG), with precise action values and adjustable. After installing the communication module, it can also be connected to the upper computer for remote control. It is basically unaffected by environmental temperature and has great advantages in energy conservation and efficiency improvement. The disadvantage is that the cost is too high, affected by the incoming power supply, and slightly prone to damage. (Suitable for doing)Short circuit protection)