Digital phase sequence sensor True RMS 3x230V 8A EXT10000325-WUN

The CKM-21 phase sequence sensor is used to protect devices powered by a three-phase network (e.g., motors) from damage in the event of phase voltage loss, phase voltage asymmetry, or incorrect phase sequence. The asymmetry threshold is factory-set at 55 V. The sensor also protects against symmetrical voltage drops by disabling relays if the voltage on any phase drops below 150 V (regardless of the asymmetry level). The device is powered from any phase, meaning that voltage on a single phase is sufficient for full functionality. A 4-second shutdown delay and voltage hysteresis make the sensor resistant to short-term voltage fluctuations. The CKM-21 has two channels operating in parallel.