A relay is an electromechanical device that is used to switch electrical current between two or more circuits. It is made up of a coil, a set of contacts, and a mechanical system that moves the contacts when the coil is energized. A 2 pole relay is a type of relay that has two sets of contacts that can be used to switch two separate circuits. In this article, we will discuss the wiring diagram for a 2 pole relay and its applications.
What is a 2 Pole Relay?
A 2 pole relay is a type of relay that has two sets of contacts. Each set of contacts can be used to switch a separate circuit. For example, a 2 pole relay can be used to switch two separate lights or two separate motors. The coil of the relay is typically rated for a certain voltage and current. When the coil is energized, it creates a magnetic field that pulls the contacts together. When the coil is de-energized, the contacts return to their original position. This makes it possible to switch electrical current between two separate circuits.
2 Pole Relay Wiring Diagram
The wiring diagram for a 2 pole relay is shown below:
| Terminal | Description |
|---|---|
| Terminal 1 | Connect to the positive (+) side of the power supply |
| Terminal 2 | Connect to one end of the coil |
| Terminal 3 | Connect to the other end of the coil |
| Terminal 4 | Connect to one side of the load |
| Terminal 5 | Connect to the other side of the load |
| Terminal 6 | Connect to the negative (-) side of the power supply |
When the coil is energized, it creates a magnetic field that pulls the contacts together, which connects terminals 4 and 5. This allows electrical current to flow through the load. When the coil is de-energized, the contacts return to their original position, which disconnects terminals 4 and 5. This stops electrical current from flowing through the load.
Applications of a 2 Pole Relay
A 2 pole relay can be used in a variety of applications, such as:
1. Lighting Control
A 2 pole relay can be used to switch two separate lights. For example, it can be used to switch a porch light and a garage light. The relay can be controlled by a switch, a timer, or a photocell.
2. Motor Control
A 2 pole relay can be used to switch two separate motors. For example, it can be used to switch a motor that opens a gate and a motor that closes a gate. The relay can be controlled by a switch, a timer, or a sensor.
3. HVAC Control
A 2 pole relay can be used to switch two separate HVAC components. For example, it can be used to switch a furnace and an air conditioner. The relay can be controlled by a thermostat, a timer, or a sensor.
FAQ
What is the coil voltage rating of a 2 pole relay?
The coil voltage rating of a 2 pole relay can vary depending on the manufacturer and the application. Common coil voltage ratings include 12VDC, 24VDC, 120VAC, and 240VAC.
How do you wire a 2 pole relay?
To wire a 2 pole relay, you will need to follow the wiring diagram provided by the manufacturer. Typically, you will need to connect the positive (+) side of the power supply to terminal 1, connect one end of the coil to terminal 2, connect the other end of the coil to terminal 3, connect one side of the load to terminal 4, connect the other side of the load to terminal 5, and connect the negative (-) side of the power supply to terminal 6.
What is the maximum current rating of a 2 pole relay?
The maximum current rating of a 2 pole relay can vary depending on the manufacturer and the application. Common maximum current ratings include 10A, 20A, and 30A.
Can a 2 pole relay be used to switch DC current?
Yes, a 2 pole relay can be used to switch both AC and DC current. However, the coil voltage rating and maximum current rating may need to be adjusted depending on the application.
Can a 2 pole relay be used to switch more than two circuits?
No, a 2 pole relay can only switch two separate circuits. If more circuits need to be switched, multiple relays can be used.
Conclusion
A 2 pole relay is a useful device that can be used to switch electrical current between two separate circuits. The wiring diagram for a 2 pole relay is relatively simple, and it can be used in a variety of applications, such as lighting control, motor control, and HVAC control. By understanding how to wire and use a 2 pole relay, you can create efficient and effective electrical systems for your home or business.
