Refrigerator Wiring Diagram and Connection

Hey, today we are going to see the Refrigerator Wiring Diagram. We will discuss the wiring diagram of the Refrigerator with Switch and MCB.

As you see in the above figure, the power lines come from the distribution board and go to the Double Pole MCB. The output of the MCB is connected to the switchboard. The power lines of the refrigerator are connected to the switchboard's five-pin socket. Actually, the refrigerator has a plug that is to be connected to the socket but to understand the connection, the plug is not used here.

Here, you can see the internal wiring diagram of refrigerator. A refrigerator has the main following internal components,

• Compressor
• Relay
• OLP or Overload Protector
• Door Switch
• Thermostat
• Bulb

Compressor

A compressor is the main part of the refrigerator. It has a total of three terminals as shown in the above wiring diagram - Common(C), Start(S), and Run(R). The common terminal is to be connected to the neutral through an OLP and the Start and Run terminals are to be connected to the relay.

Relay

Here, the relay has a total of three terminals the input terminal is to be connected to the thermostat from where it will get the phase supply and the other two terminals are to be connected to the compressor start and run terminals.

OLP or Overload Protector

It is a safety device. When any fault happens with the compressor it will disconnect the power supply. Generally, it is connected in series with the neutral supply and the compressor common terminal.

Door Switch

It is connected in series with the lamp. It helps to turn on or turn off the light during the closing and opening of the refrigerator door. When we open the door it allows the supply to the lamp and the lamp will glow, and when we close the door it disconnects the power supply and the lamp or bulb will turn off.

Thermostat

The thermostat is the device or sensor that monitors the temperature inside the refrigerator and according to the temperature, it turns off and turns on the compressor.

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