What is relay?
Relay is an electrically operated switch. Mainly relays used an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations
Electromagnetic Relay Description:
- Small universal relay capable of power switch
Switch control for air-conditioning compressor
Switch control for electric tools and a variety of motor
Switch control for heater power control
Switch control for a variety of drying machine power control
Switch control for controlling various lights
Switch control for packaging machines, food processing equipment, power control
- Low power consumption
- Rugged Design
- Silver alloy contacts
- Multiple type relay
MK2P-I: Standard models
MK2P-I-S: With manual test button function
MK2P-I-N: With operation indicators
- With mechanical flag indicator
- Power Supply
AC(V) 6,12,24,48,60,110,220,240,380 50Hz
- Output Contacts rated 10A at 250 VAC or 30 VDC
- Two pole changeover contacts
- Socket mounted with PF083A
Different Types of Relay:
Other than the Electromagnetic relay there are many other types of relays which work on different principles. Its classification is as follows
Types of Relay Based on the principle of operation
When two different materials are joined together it forms into a bimetallic strip. When this strip is energized it tends to bend, this property is used in such a way that the bending nature makes a connection with the contacts.
With the help of few mechanical parts and based on the property of an electromagnet a connection is made with the contacts.
Solid State relay:
Instead of using mechanical parts as in electrothermal and electromechanical relays, it uses semiconductor devices. So, the switching speed of the device can be made easier and faster. The main advantages of this relay are its more life span and faster switching operation compared to other relays.
It is the combination of both electromechanical and solid state relays.
Types of Relay Based on the polarity:
These are similar to the electromechanical relays but there exists both permanent magnet and electromagnet in it, the movement of the armature depends on the polarity of the input signal applied to the coil. Used in telegraphy applications.
The coil in these relays doesn’t have any polarities and its operation remains unchanged even if the polarity of the input signal is altered.