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Phase control relays CZF-331
With two separated contacts 2C/O.
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.
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.
- 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
- 2 × relay
- Maximum load current
- 2 × 8 A
- Contact configuration
- 2 × 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 4,0 mm²
- Tightening torque
- 0,5 Nm
- Power consumption
- 1,2 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
16 other products in the same category
With two separated contacts 2C/O.
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.
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.