Three-phase asymmetry and sequence monitors CKF-BT TRMS

Three-phase asymmetry and sequence monitors CKF-BT TRMS

CKF-BT-TRMS, 5902431673646

Product description

With adjustable actuation time 0,5÷5sec.
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.


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 voltage3 × 400 V + N
Cooperation with power generatorsNO
Phase failure / asymmetry monitoringYES
Phase sequence controlYES
Contactor contact monitoringNO
The executive elementrelay
Maximum load current10 A
Contact configuration1 × NO/NC
Separation of the contactYES
Voltage asymmetry40÷80 V
Voltage hysteresis5 V
Switch off delay0,5÷5 s
Power control2 × LED
Terminalpluggable terminal blocks 4,0 mm²
Tightening torque0,5 Nm
Power consumption1,6 W
Working temperature-25÷40°C
Dimensions2 modules (35 mm)
Assemblyon rail 35 mm
Ingress Protection MarkingIP20

System which prevents automatic motor restart after power recovery