Contactor Overload Wiring - 21 Images

The contactor is on top and the overload relay is attached directly to it on bottom. In the above one phase motor wiring i first connect a 2 pole circuit breaker and after that i connect the supply to motor starter and then i do cont actor coil wiring with normally close push button switch and normally open push button switch and in last i do connection between capacitor start motor and contactor. Note that nc means normal close and no means normal open in clear words nc push button is a button which is normally close circuit and no push button is a button which is normally open electric circuit.

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In a wiring diagram the symbol for overload contacts may look like two opposed question marks or an s.

Contactor overload wiring. In the above image i wire a contactor and thermal overload relay for a three phase motor with nc and no push button. Strip the ends of the wires by 1 2 in 1 3 cm. Want to wire first we must have some understanding of the function of the equipment of which the air switch is believed to be very clear to everyone the more common electrical appliances in life can be seen by opening the household distribution box if these three equipment. You see 4 terminals because there are 3 poles and an auxiliary contact.

In the above image i wire a contactor and thermal overload relay for a three phase motor with nc and no push button. As an example the auxiliary contact can be used for something like turning on a pilot light on the control panel to indicate the motor is operating. See our full product selection. Thermal overload relay and air switch ac contactor wiring method.

How to wire a contactor opening the wires and contactor route the colored wires from your home s electrical circuit. Note that nc means normal close and no means normal open in clear words nc push button is a button which is normally close circuit and no push button is a button which is normally open. Bring the wires from the device to the contactor. Use a screwdriver to loosen the holding screws on the contactor.

The above diagram is a complete method of single phase motor wiring with circuit breaker and contactor. The overload contacts are connected in series and located between the contactor and the motor itself to prevent the motor from restarting once the overload trips.