Electromechanical relays vs solid-state relays

Relays are electrically operated switching devices, used to gain control over processes and circuits. Based on their principle of operation they are classified into two types: Solid-state relays and electromechanical relays. In this article let us discuss each one of them, their differences and similarities. Comparison of electromechanical and solid-state relays Electromechanical relays Solid-state relays … Read more

Difference between earth leakage relay and earth fault relay

Earth fault is an undesirable condition at which current flow from a conductor to earth. This can happen when a current-carrying conductor falls on the ground or the body of any equipment or when someone touches a live conductor with adequate PPE or due to insulation failures. Earth leakage relay and earth fault relays are … Read more

Relay – Operation, types and applications

A relay is an electrically controlled switching device. It consists of an electromagnet and a set of contacts that open or close when voltage is applied to the electromagnet. It was invented by the U.S. scientist Joseph Henry. In the beginning, electromechanical relays were used to transfer the Morse-code signal to long-distance through a wire. … Read more

Difference between contactor and relay

Contactors and relays are electrically operated switches used for the control and switching of loads. The difference between them primarily lies in the load current that they can handle, where they are used, and how they are used in a circuit. This article can give you a clear picture of the difference between contactor and … Read more