Three-phase voltage relay CP-500 without N CP-500

Intended use

The CP-500 sensor is designed to protect electric motors powered from a 3×3×500V three-phase network in the event of power failure voltage in at least one phase, symmetrical voltage drop in three phases or asymmetry of voltages between phases, which may damage the motor, and protection of the direction of motor rotation in case of phase change in front of the sensor. Protection functions

* against phase failure

* against phase voltage drop below 240V

* against phase sequence change

* against phase asymmetry

* against symmetrical voltage increase above 580V

* against symmetrical voltage drop below 420V Operation

With correct mains voltages, the contacts are closed . Occurrence of any anomaly for longer than the set time causes the activation of the protection - opening of the sensor's contacts. Closing the contacts will occur automatically with a time delay  after the return of the correct parametersóin the network.