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Three-phase asymmetry and sequence monitors CKF-337
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.
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 asymmetrical voltage drop
Functioning
In case of 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 put a motor to motion. Change of phase sequence, before the monitor, which causes change of motor rotation direction (in relation to that primarily set) along with impossibility of switching-ON the motor.
- Power supply voltage
- 3 × 400 V
- Cooperation with power generators
- YES
- Phase failure / asymmetry monitoring
- YES
- Phase sequence control
- YES
- 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÷60 V
- Voltage hysteresis
- 5 V
- Switch off delay
- 0,2÷5,0 s adjusted
- Power control
- 4 × LED
- 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
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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.
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.