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ControlElectrical Wiring InstallationMotors

Control 3-Phase Motor from more than Two buttons Power & Control Diagrams

Control 3-Phase Motor from more than Two buttons Power & Control Diagrams

Abbreviations:
L1 , L2, L3
= Red, Yellow, Blue ( 3 Phase Lines)

N = Neutral 
O/L = Over Load Relay
NO = Normally Open

K1 = Contactor (Contactor coil)
K1/NO = Contactor Holding Coil (Normally Open)

Control 3-Phase Motor from more than Two buttons Power Diagram
Power Diagram:Control 3-Phase Motor from more than Two buttons Power & Control Diagrams 

Control 3-Phase Motor from more than Two buttons Control Diagram
Control Diagram:Control 3-Phase Motor from more than Two placesCheck more diagrams like this here: Three Phase Motor & Control Installation wiring diagrams

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3 Comments

  1. Dear sir, I really appreciate the wiring, it’s quite easily to understand. I needs more of it to know, like water pomp motor.

  2. I have to take exception with your control diagram.
    The OFF push buttons should be shown normally closed.
    The diagram above indicates that they are normally open resulting in the motor never starting.

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