Single Phase Motor Wiring Diagram With Capacitor Start Pdf
Single phase motors are widely used for various applications in the US. However, while installing such a motor, one of the most crucial things to know is its wiring diagram. A wiring diagram guides us on how to connect the wires correctly while installing a motor. A motor with a capacitor start is one of the most commonly used single-phase motors in the US.
What is a Single Phase Motor with Capacitor Start?
A single-phase motor with a capacitor start has an auxiliary winding, which is connected to a capacitor. The capacitor is used to provide the starting torque, which is essential to start the motor. Once the motor starts running, the capacitor is no longer required, and it can be disconnected from the circuit.
Wiring Diagram for Single Phase Motor with Capacitor Start
Before installing a single-phase motor, we should have a clear idea of how to connect the wires. Here is the wiring diagram for a single-phase motor with a capacitor start:
There are mainly two types of wiring diagrams for single-phase motors with a capacitor start:
- Manual Start Wiring Diagram: In this type of wiring diagram, we need to manually switch on the motor by pressing a button or turning a switch.
- Automatic Start Wiring Diagram: In this type of wiring diagram, the motor starts automatically when the power is applied to it.
How to Connect the Wires?
Connecting the wires correctly is crucial while installing a single-phase motor with a capacitor start. Here is a step-by-step guide on how to connect the wires:
- First, turn off the power supply to the motor.
- Locate the motor's wiring box.
- Open the wiring box and identify the wires. There will be four wires - two main wires, a starting capacitor wire, and a centrifugal switch wire.
- Connect one main wire (usually black in color) to the L1 terminal of the supply voltage, and the other main wire (usually red or yellow in color) to the L2 terminal of the supply voltage.
- Connect the starting capacitor wire (usually blue in color) to the "C" terminal of the motor.
- Connect the centrifugal switch wire (usually white in color) to the "T2" terminal of the motor.
- Once all the wires are connected correctly, close the wiring box and turn on the power supply.
Precautions
While installing a single-phase motor with a capacitor start, we should keep the following precautions in mind:
- Always turn off the power supply before connecting the wires.
- Make sure the wires are connected correctly as per the wiring diagram.
- Use proper tools for connecting the wires.
- Check the motor's voltage and current rating before connecting it to the power supply.
- Never touch the wires or the motor when the power supply is on.
- Always wear safety gloves and goggles while installing the motor.
Conclusion
Installing a single-phase motor with a capacitor start is not a complicated task if we follow the wiring diagram and the precautions mentioned above. Always make sure to turn off the power supply before connecting the wires and wear proper safety gear. By following these simple steps, we can install a single-phase motor with a capacitor start without any hassle.