Motor protector 16

Published:2011/6/27 22:10:00 Author:Nicole | Keyword: Motor, protector | From:SeekIC

This motor protector circuit is made of AC contactor KM1, it is shown in the figure 8-52. When 380V AC power voltage is normal, the AC contacts are all turned on, if knife switch Q2 is closed, then motor M runs. Due to lightning or other reasons, the 380V AC voltage is lack-phase, one of KM1-KM3 AC contacts will not pull in or power failure and release, the motor M's power supply cirucit is cut off, then it protects the motor M. For example, when L2 phase line voltage disappears, AC contact KM2 releases, the normally open contact KM2-1-KM2-3 turns off.



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