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Home Contactor Electrical Electrical Connection How To Do Wirig Diagram Electrical Contactor Connection and Wiring Diagram

Electrical Contactor Connection and Wiring Diagram

Contactor, Electrical, Electrical Connection, How To Do, Wirig Diagram

Hey, in this article we are going to see proper electrical contactor connection and wiring diagram for normal operation, star-delta starter, motor control, light control, etc. Also, we will discuss the internal circuit diagram of the contactor used for power control.

What is Electrical Contactor?

In simple words, Electrical Contactor is an electrically operated switch whose main function is to connect or disconnect the load from the power source. Basically, the contactor work as a medium when we control a high voltage, high current power circuit by a low voltage, low current control circuit.

Contactor Symbol:



Contactor Terminals and Contacts

Before you going to do a connection for a contactor you must know about its terminals and contacts. Basically, a contactor has two types of contacts - 1. Main or Power Contacts and 2. Auxiliary Contacts

Read Also: Difference between Auxiliary and Main Contacts in Contactor

In the below figure, you can see there is a total of 16 terminals in the contactor.



A1 and A2 are magnetic coil terminals.

L1, L2, and L3 are the incoming terminals of the main contact which are to be connected to the main power supply.

T1, T2, and T3 are the outgoing terminals of the main contact which are to be connected to the load.

Here two NC and two NO auxiliary contacts are available. Each of them has two terminals.

Read Also: Wiring Diagram of Solar Panel with Battery, Inverter, Charge controller and Loads.

Contactor Connection Procedure

1. Generally the magnetic coil of a contactor is designed to operate at a low voltage

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