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The three-phase monitoring relays CM-PAS.x1 are designed for use in three-phase mains for monitoring the phase parameters phase sequence, phase failure as well as phase unbalance. The CM-PAS.x1 provide an adjustable ON-delay and work according to the closed-circuit principle.
Monitoring of 3 phase voltage systems for phase failure. On phase loss the output relay is de-energized after an adjustable time delay \(contact 15-18 closed\) Created Date
Phase sequence and phase failure monitoring. If all phases are present with the correct phase sequence, the output relay energizes after the fixed start-up delay t is complete. If a phase failure or a phase sequence error occurs, the fixed tripping delay t starts. When timing is.
The CM-PSS.x1 are monitoring relays for three-phase mains. They monitor the phase parameters phase sequence, phase failure, over- and undervoltage. The threshold values for over- and undervoltage are fixed.
The CM-PFS is a three-phase monitoring relay that is used to monitor three phase mains for incorrect phase sequence and phase failure. All devices are available with two different terminal versions.
The Model 18 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 18 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a microcontroller with a voltage and phase-angle sensing circuit, driving an electromechanical relay. When correct
The Connection Diagram below shows a typical installation, whereby the supply to a load is being monitored by the Phase monitoring relay. If a fault should occur (i.e. fuse blowing), the relay will de-energise and assuming control of the external Contactor, de-energise the Contactor as well.
