CMD Contactor Monitoring Device. Purchase CMD Contactor Monitoring Device direct from KM Parts USA.

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CMD Contactor Monitoring Device

Part Name:

CMD(24VDC)

CMD(110-120VAC

CMD(220-240VAC)

Article Number:

106170

106171

106172

The function of the CMD is to monitor the main contacts of a contactor against welding. For this the control voltage of the contactor is compared with the state of the main contacts which is reliably monitored using a mirror contact (IEC EN 60947-4-1 Appendix F). If the coil is de-energized and the contactor does not drop out the CMD trips the upstream circuit-breaker/motor-protective circuit-breaker/disconnect switch via an under voltage release.