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Motor protector 5

2016-09-03 03:55  
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Motor protector 5
This motor protector circuit is composed of annular current transformer TA, protection relay KP, starter button S1, stop button S2, point button S3, AC contactor KM and heat relay KP, it is shown in the figure 8-41. When stop button S2 is pressed, KM releases, M stops running. When the motor M is leakage or the body touches the leakaged motor M, TA's current increases, KP does, it cuts off motor M's work power and self-locked. When the motor M has over current or over load, heat relay KP does, KM is released, M stops running.