What are the common electrical components?
Common electrical components include circuit breaker, AC contactor, intermediate relay, indicator light, contactor, thermal relay, transfer switch and travel switch.
Low voltage circuit breaker, also known as automatic air switch, is not only a manual switch, but also an electrical appliance that can automatically protect against voltage loss, undervoltage overload and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they have serious overload, short circuit, undervoltage and other faults.
The electromagnetic mechanism is composed of a coil, a moving iron core (armature) and a static iron core. The contact system is composed of main contact and auxiliary contact. The main contact is used to make and break the main circuit, and the auxiliary contact is used in the control circuit.
Thermal relay is a relay that uses the principle of thermal effect generated by current passing through components to act in inverse time.
The principle of intermediate relay is to change one input signal into multiple output signals or amplify the signals. It is essentially a voltage relay, but it has a large number of contacts (up to 8 pairs), a large contact capacity (5~10A) and sensitive action.
When the contact pairs of other electrical appliances are not enough, the number of their contacts can be expanded with the help of intermediate electrical appliances. It can also realize the expansion of contact point through capacitance.
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