Phase control relays CZF

Phase control relays CZF

CZF

With the fixed actuation threshold voltage asymmetry.
Three phase monitors serve to protect the three-phase electric motors supplied from three-phase mains, against phase collapse in at least one phase or against phase-to-phase voltage asymmetry, threatening to damage the motor.


 

Functioning
Phase collapse in at least one phase or voltage unbalance between phases above fixed actuation threshold causes switching-OFF the motor. The motor switching-OFF occurs with delay, which prevents any accidental motor disconnecting at temporary voltage drop. The re-connection will occur automatically at voltage increase of 5V above activation voltage (i.e. of value of voltage hysteresis). At occurrence of these disturbances, it is not possible to set a motor in motion.

 

Power supply voltage3 ├Ś 400 V + N
Cooperation with power generatorsNO
Phase failure / asymmetry monitoringYES
Phase sequence controlNO
Contactor contact monitoringNO
The executive elementrelay
Maximum load current10 A
Contact configuration1 ├Ś NO
Separation of the contactYES
Voltage asymmetry45 V
Voltage hysteresis5 V
Switch off delay4 s
Power control3 ├Ś LED green
terminalOMY 4├Ś1 mm┬▓; 2├Ś0,75 mm┬▓, l: 0,5 m
Power consumption1,6 W
Working temperature-25├Ě40┬░C
dimensions51├Ś67├Ś26 mm (┬▒ 1 mm)
Assemblyon wall
Level of securityIP20



System which prevents automatic motor restart after power recovery

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