CZF-331 F&F phase loss sensor

Product description

With two separated contacts. 2 x NO/NC.
Phase loss sensor is designed to protect an electric motor powered from a three-phase network in cases of voltage loss in at least one phase or voltage asymmetry between phases, threatening destruction of the motor.

Operation
Voltage loss in at least one phase of any phase or voltage asymmetry between phases above the tripping threshold will turn off the motor. Shutdown will occur with a delay of 4 s, which prevents accidental disconnection of the motor during a momentary voltage drop. Reconnection will occur automatically when the voltage rises by 5 V above the tripping voltage (i.e. by the voltage hysteresis value). With the above anomalies, the relay contact is disconnected and it is impossible to start the motor.

ATTENTION!
The use of two switch contacts of the relay allows to connect an additional device or controlled system, as well as a visual or audible signaling system informing about relay tripping, i.e. motor shutdown.