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What is a power relay?

Update:25-11-2019
Abst:

  Power relay is a switch which uses an electromagnetic […]

  Power relay is a switch which uses an electromagnetic coil in order to close or open a circuit. It also contain an armature, a spring and one or several contacts.

  If the power relay is designed to be normally opened, when the power is applied, then the electromagnet attracts the armature, which is then pulled in the coil’s direction until it reaches a contact, therefore closing the circuit.

  If the relay is designed to be normally closed, the electromagnetic coil pulls the armature away from the contact, therefore opening the circuit.

  It can be operated using a low amount of voltage but can also conduct a higher amount of voltage.

  For this reason, these are used for many different applications, including audio amplification, automotive electronics and telephone systems.

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