Phase control relays CZF-333
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  • Phase control relays CZF-333
  • Phase control relays CZF-333
  • Phase control relays CZF-333

Phase control relays CZF-333

CZF-333, 5908312593232

Without neutral lead. Prevents against symmetrical and asymmetrical voltage drop.
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.

PREVENTS AGAINST SYMMETRICAL AND ASYMETRICAL VOLTAGE DROP

 


 

Functioning
In case  the voltage asymmetry above set value between phases causes the switching-OFF the motor. The switching-OFF the motor also occurs in case of phase-to-phase voltage drop below 320V. The motor switching-OFF occurs with 4 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.
 

CZF-333
Power supply voltage
3 × 400 V
Cooperation with power generators
YES
Phase failure / asymmetry monitoring
YES
Phase sequence control
NO
Contactor contact monitoring
NO
The executive element
relay
Maximum load current
10 A
Contact configuration
1 × NO/NC
Separation of the contact
YES
Voltage asymmetry
20÷50 V
Voltage hysteresis
5 V
Switch off delay
4 s
Power control
3 × LED green
Terminal
pluggable terminal blocks 4,0 mm²
Tightening torque
0,5 Nm
Power consumption
1,6 W
Working temperature
-25÷40°C
Dimensions
3 modules (52,5 mm)
Assembly
on rail 35 mm
Ingress Protection Marking
IP20
TrueRMS
NIE






System which prevents automatic motor restart after power recovery

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