The 3 phase MCB symbol is as follows:
The MCB is a safety circuit equipped with a thermal (bimetal) component for overload protection and is also equipped with an electromagnetic relay for short circuit safety.
MCB is widely used for single-phase and three-phase circuit safety. The advantages of using MCB, namely:
1. Can break a three-phase circuit even if a short circuit occurs in one of the phases.
2. Can be reused after the circuit is repaired due to short circuit or overload.
3. Have a good response in case of short circuit or overload.
In the MCB there are two types of safety, namely thermally and electromagnetically, the thermal safety functions to secure overload currents while the electromagnetic safety functions to secure in case of a short circuit.
Thermal protection on the MCB has the same principle as thermal overload, namely using two metals that are combined (bimetallic), thermal security has a delay, this depends on the amount of current that must be secured, while the electromagnetic safety uses a coil that can pull an armature from iron. soft.
Other much sought after themes:
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