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What is the protection devices that you have to fix it on the motor?

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Question added by ahmed ali abd elhamed , electrical engineer , sanita Industry
Date Posted: 2013/10/16
حسام ناجى
by حسام ناجى , testing and commissioning engineer II , SENDAN INTERNATIONAL COMPANY

on the stator you can fix these devices

1) Phase &Ground fault protection.2) Inter turn fault protection.3) Over&Under voltage protection.4) Temperature (Thermal) protection.

and on the rotor you can fix these devices

1) Ground fault on rotor winding.2) Loss of excitation.3) Over speed.4) Motoring of generator.

 

Mohamed Elzubier
by Mohamed Elzubier , Technical Manager , BARBAR PLastics Industries Factory

PTC(Positive Temperature Ceoff.) Thermistors, NTC ( Negative Temp. Ceoff) or Thermostats, If you mean the protection devices that you fix on or inside the motor. These devices provide winding over-heating pfotection.

Mustapha Zakkour
by Mustapha Zakkour , electrical supervisor , Saudi Oger Ltd,King Abdullah development of the security headquarters of the Ministry of Interior

The thermal protector or thermal relay is in a place to turn the moter off when excessive heat 

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