Three-phase asymmetry and sequence monitors CKF-BR
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  • Three-phase asymmetry and sequence monitors CKF-BR
  • Three-phase asymmetry and sequence monitors CKF-BR
  • Three-phase asymmetry and sequence monitors CKF-BR

Three-phase asymmetry and sequence monitors CKF-BR

CKF-BR, 5908312593188
With adjustable actuation threshold voltage asymmetry.
Three phase and sequence monitor is designed to protect tree phase electric motors against voltage drop in at least one phase or voltage asymmetry between phases, which could damage the motor, with additional protection of motor rotation direction in case of phase change before the monitor.



 

Functioning
Voltage collapse in any phase or voltage asymmetry between phases above set value causes switching-OFF the motor. The motor switching-OFF occurs after delay of 4 sec, which prevents accidental motor switching-OFF caused by instantaneous voltage drop. Switching the motor ON anew occurs automatically when the voltage increases about 5V~ above activation voltage. At occurrence of these disturbances, it is not possible to  set a motor in motion. In case of 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. The switching-ON is possible after the return to correct phase sequence.
 





CKF-BR
Power supply voltage
3 × 400 V + N
Cooperation with power generators
NO
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
40÷80 V
Voltage hysteresis
5 V
Switch off delay
4 s
Power control
2 × LED
Terminal
pluggable terminal blocks 4,0 mm²
Tightening torque
0,5 Nm
Power consumption
1,6 W
Working temperature
-25÷40°C
Dimensions
2 modules (35 mm)
Assembly
on rail 35 mm
Ingress Protection Marking
IP20
TrueRMS
NIE




System which prevents automatic motor restart after power recovery