Phase control relays CZF-334 True RMS

Phase control relays CZF-332 View larger

Phase control relays CZF-334 True RMS

CZF-334-TRMS, 5902431672540

Product description

With separated contact.
Three phase monitor serves 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 or against damage of contacts threatening to damage the motor.



Phase collapse in at least one or voltage unbalance between phase above set value causes switching-OFF the motor. The motor switching-OFF occurs with  sec 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. Shining of red diode LED along with simultaneous disconnecting the apparatus permanently, indicates contactor contacts damage. Reactivation of the apparatus is possible (after contact repair), after disconnecting from supply all three phases (fuses) and then, after switching-ON anew.


Power supply voltage3 × 400 V
Cooperation with power generatorsYES
Phase failure / asymmetry monitoringYES
Phase sequence controlNO
Contactor contact monitoringNO
The executive elementrelay
Maximum load current2×6 A
Contact configuration2 × NO/NC
Separation of the contactYES
Voltage asymmetry20÷80 V
Minimalne napięcie fazy320 V
Maksymalne napięcie fazy480 V
Voltage hysteresis5 V
Switch off delay1÷10 s
Power control2 × LED
Return delay1÷60 s
Terminalpluggable terminal blocks 2,5 mm²
Tightening torque0,4 Nm
Power consumption1,6 W
Working temperature-25÷40°C
Dimensions1 module (18 mm)
Assemblyon rail 35 mm
Ingress Protection MarkingIP20

System which prevents automatic motor restart after power recovery