Motor protector circuit diagarm 5

Published:2011/6/1 20:02:00 Author:Lucas | Keyword: Motor protector | From:SeekIC

The motor protector circuit is composed of the ring current transformer TA, protection relay KP, start button S1, stop button S2, inching button S3, AC contactor KM and thermal relay KR and other components, and the circuit is shown as the FU1. Turning on the start button S1 will make KM get power and lock-hold, and the motor M will get power and operate; if pressing the inching button KR53 will make the M get power and operate. M will be turned off after A3 being reset. When one phase of the three-phase AC power supply open occurs phase, AC power contactor KM will be released, and the motor M stops to protect the motor and prevent their damage from phase running. When the motor M is over-current or overload, thermal relay KR operates to make the KM release and M stop.



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