We have already discussed about the working of electrical relays. Now we are going through different types of electrical relays.
- Electromechanical Relays
- Solid State Relays
Read more about Different Types of Protective Relays here
General Purpose Relay
Power relays also contain an armature, a spring and one or several contacts. If the power relay is designed to normally be open, when power is applied, 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.
Power relays are used for many different applications, including:
- Automotive electronics
- Audio amplification
- Telephone systems
- Home appliances
- Vending machines
Power relays are used for switching a wide variety of currents for applications including everything from lighting control to industrial sensors.
Solid State Relays
How Solid State Relay Works?
- Advantages of Solid State Relays include low EMI/RFI, long life, no moving parts, no contact bounce, and fast response.
- The drawback to using a solid state relay is that it can only accomplish single pole switching.