Top 12 Electromechanical Relays

Electrical circuits work on the concept of electric current and voltage, and if any device used in this circuit is not appropriate, then it can damage the complete circuit. It is essential to look at every feature and the parameters that the electromechanical relays must satisfy before buying one. What if you are not aware of the factors to be considered? No worries, the underlying guide will provide complete information related to this device.

Latching and non-latching types of electromechanical relays

Electromechanical relays include a coil, electrical contacts, and armature mechanism. These relays are available in both latching and non-latching forms. The latching variety of relay contains magnets that hold the armature in its present position when the current is removed from the coil. Latching ones are suitable for low-voltage applications. Unlike latching relays, the non-latching ones require continuous current flow for operation. These relays are found in those applications where switching back to a safe state in power failure situations is necessary.

Classification based on poles and throws

The number of poles determines the number of circuits the electromechanical relay can control. The number of throws tells you about the number of outputs that need to be connected to the input through each pole. These numbers have classified these relays into four types. First is the single pole single throw, which controls one circuit connected to one input. Second is a single pole double throw that connects one input circuit to one of the two outputs, a double pole single throw that can connect two terminals of one circuit, and a double pole double throw.

Testing of the relay

For reliable performance, periodic checks and testing are required. Commissioning test is necessary because it determines the relay's functioning for a specific protection scheme, which tells about the accuracy and ratings.

Categories Simillar to Electromechanical Relays includes Solid State Relays, Voltage Monitoring Relays and Electrical Relays

Solid State Relays

Voltage Monitoring Relays

Electrical Relays