Voltage relays CP-500

The CP-500 sensor is designed to protect electric motors supplied from a 3 × 500 V three-phase network in cases of voltage decay in at least one phase, symmetrical voltage drop in three phases or asymmetry of voltages between phases, threatening motor damage and motor rotation protection in case of phase changes in front of the sensor.

Security functions
* before the phase disappears
* before phase voltage drop below 240 V
* before changing the phase sequence
* before phase asymmetry
* before symmetrical voltage increase above 580 V
* before a symmetrical voltage drop below 420 V
    

Functioning
With proper network voltages, the contacts are closed. The occurrence of any anomaly in a longer time than set, causes the protection to trip - opening the sensor contacts. Closing contacts will be automatic with a time delay, after return of the correct network parameters.