To protect a load from overvoltage...?

Update:

240v,17A, single phase motor.

Connection is such in respectively: mcb(25A)+mov(?)+magnetic contactor (with overload relay)+motor box...

(((Magnetic contactor for automatic tank control.)))

Any modifications needed in this conection

  Many many thanks 😊... 

6 Answers

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  • 1 month ago

    You have an overload relay. That is what it does.

  • 1 month ago

    Since it contains an overload relay, it is protected from over voltage. As power source voltage rises, motor current becomes higher and cut off power by overload relay while motor current reach high than 25A.

    In general, does not need to modify to it, or you may adjust the overload relay to kick in at lower current as wish !

    MOV is a part in parallel with the motor terminals to reduce the sparking between the contacts to rotor, make the motor brushes last longer life.

  • 1 month ago

    not clear what you are asking. More detail is needed, and less abbreviations. 

    contact a local electrician... 

  • Anonymous
    1 month ago

    dedicated ground 

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  • 1 month ago

    You are completely in the wrong section for asking this kind of question.  Is it about cars? Whatever it is, try Consumer Electronics, or ....?

  • Anonymous
    1 month ago

    you need a surge suppressor ..................................

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