Phase control relays CZF-311
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  • Phase control relays CZF-311
  • Phase control relays CZF-311
  • Phase control relays CZF-311

Phase control relays CZF-311

CZF-311, 5908312593133
With adjustable actuation threshold at 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 set value causes switching-OFF the motor. 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-311
Power supply voltage
3 × 400 V + N
Cooperation with power generators
NO
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
40÷80 V
Voltage hysteresis
5 V
Switch off delay
4 s
Power control
3 × LED green
Terminal
pluggable terminal blocks 2,5 mm²
Tightening torque
0,4 Nm
Power consumption
0,56 W
Working temperature
-25÷40°C
Dimensions
1 module (18 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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