Classification of relays according to working principle

Update:26-10-2019
Summary:

1. Electromagnetic relay: An electrical relay that work […]

1. Electromagnetic relay: An electrical relay that works by the suction force generated between the electromagnet core and the armature in the input circuit.
2. Solid state relay: A type of relay in which the electronic component performs its function without mechanical moving parts, and the input and output are isolated.
3. Temperature relay: A relay that operates when the outside temperature reaches a given value.
4. Reed relay: a relay that opens, closes or converts the line by using a reed action that is sealed in the tube and has the dual action of the electric spring and the armature magnetic circuit.
5. Time relay: When adding or removing the input signal, the output part needs to delay or limit the time to close or disconnect the controlled line relay until the specified time.
6. High-frequency relay: A relay used to switch high-frequency, RF lines with minimal loss.
7. Polarized relay: A relay that has a polarized magnetic field and a controlled action of a magnetic field generated by a control coil. The direction of operation of the relay depends on the direction of the current flowing through the control coil.
Other types of relays: such as optical relays, acoustic relays, thermal relays, instrumentation relays, Hall effect relays, differential relays, etc. The relay operates in the same way, automatically closing or opening after reaching a certain condition.