CZF-333 phase decay and unbalance detector CZF-333

Intended use
The phase loss sensor is designed to protect the motor  power supplied from a three-phase network in the event of a voltage drop in at least one phase, symmetric voltage drop in three phases or voltage asymmetry between phases, which may result in motor damage. Action
Voltage failure in at least one, any phase or Trip voltage asymmetry [V] between phases above the set threshold will cause the motor to be switched off. The motor will also be switched off in the event of a symmetrical drop in phase-to-phase voltage in all three phases below 320V. The shutdown will occur with a delay of 4 seconds, which prevents  disconnecting the motor in the event of an accidental, momentary voltage drop. Reactivation will take place automatically when the asymmetry drops by 5V below the set threshold (i.e. by the value of the voltage hysteresis). With the above anomalies, the engine cannot be started.