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Aug 17, 2016

Motor Protection and Its Types of Electrical Faults

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There is a wide range of motors in existence for various purposes. However, the fundamental problems affecting the choice of motor protection are independent of the type of motor and the type of load to which it is connected. The motor under discussion here are a.c. motors which include synchronous  and induction motors protection and its types of electrical faults.
 
Motor Protection
 

Types of Faults to be protected in Motors

Types of electrical faults in motors are similar to those of generators. Motors therefore in general are protected against the following faults:
  1. Stator faults
  2. Rotor Faults
  3. Overloads
  4. Unbalanced supply voltages including single phasing
  5. Under voltage
  6. Reverse or Open-phase starting
  7. Loss of synchronism ( in the case of synchronous motors only)