Introduction to Circuit and Motor Protection – MOTOR PROTECTION (1)

Motors are required to have protection against overload situations when the motor draws excessive current for a certain period of time (see Figure 27).

For instance, excessive current occurs when a motor is overloaded by a jamming condition in the line that stops motor rotation.
A motor can also overheat if it is started and stopped too frequently. When overloading occurs in
a motor, the motor will overheat, resulting in a deterioration of its insulation and causing damage to the motor.


to be continued……..

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