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2 Speeds 1 Direction 3 Phase Motor Power and Control Diagrams

Two Speeds One Direction Three Phase Motor Connection Power and Control Diagrams

Abbreviations:
O/L = Over Load Relay
NO = Normally Open
NC = Normally Close
Low = Low Speed
High = High Seed

2 Speeds 1 Direction 3 Phase Motor Power and Control Diagrams

2 Speeds 1 Direction 3 Phase Motor Connection Power Diagram
Power Diagram:2 Speeds 1 Direction 3 Phase Motor Power and Control Diagrams

 2 Speeds 1 Direction 3 Phase Motor Connection Tap wound Control Diagram
Control Diagram: Two Speeds One Direction Three Phase Motor Connection Power & Control Diagrams
Check more diagrams here: Three Phase Motor & Control Installation wiring diagrams

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11 comments

  1. Good Evening,

    I want to know the fundementals behind 2 speed control in the motor. Will it be applicable for slip-ring motors also?

    Thanking you,

  2. Deepak kumar sahoo

    please tell me fundamental of 2 speed 1 direction of 3 phase motor,what is S1 AND S2 and its working.kindly please tell me

  3. Girum Ashenafi

    It is very helpful thanks.but please can you tell me what S1 and S2 means?(it is not written in the description).

  4. Hi can I please get a simple control and power diagram for a 2speed. Motor 3phase thanks

  5. witch overload should be greater high speed or low speed

  6. What’s the ratio between low & high speed?

  7. please is it the normal stop and start button can be use for the control and many stop and start button required for this??????

  8. Hi guys. Please explain to me if I must really put a contactor on my 3 phase motor. And can I not just run it straight without a contactor. 2 contactors burned out in one day but nothing wrong with motor. motor is a hi low 3 phase motor on a air compressor.

    Please explain to me.

    • You need a contactor for controls. Check the input voltage of your contactor coils and ensures it’s the same with the voltage that’s powering it.

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