Solution

The relay consists of one or more pairs of contacts and windings. When there is current flowing through the winding, the contact will open or close. When the relay interrupts the current flowing to the inductive load, a voltage spike pulse will appear. In severe cases, the voltage spike will exceed the rated voltage of the relay contact and damage the contact.

Technical features

Relay is widely used in consumer electronics industry and industrial equipment. It has control system (also known as input loop) and controlled system (also known as output loop).

It is actually an "automatic switch" that uses a smaller current to control a larger current Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit.

The relay may be damaged due to overcurrent or overvoltage.

It consists of a pair of contacts or several pairs of windings. When there is current flowing through the winding, the contact will open or close. When the relay interrupts the current flowing to the inductive load, a voltage spike pulse will appear. In severe cases, the voltage spike will exceed the rated voltage of the relay contact and damage the contact.

It may be damaged suddenly and seriously, or very slowly, which will take many years to reflect.

In addition, when the contact is disconnected and the current is interrupted, if the current flowing through the relay contact is too large, it will also cause damage.

Excessive current and voltage will also damage the winding of the relay.

If the relay winding is designed to have current flow only in a short time under normal operation, if there is current flow for a long time, although the current is within the range of normal operation, it will eventually burn out the winding.