Three-phase asymmetry and sequence monitors CKF TRMS

Reference: CKF-TRMS, EAN13: 5902431673554

Product description

With fixed 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 fixed actuation threshhold 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 of 5V~ above activation voltage (i.e. about value of voltage hysteresis). At occurrence of these disturbances, it is not possible to set 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) is signaled by shining red diode LED along with impossibility of switching-on the motor. The re-connection is possible after the return to correct phase sequence.

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
Separation of the contact	YES
Voltage asymmetry	45 V
Voltage hysteresis	5 V
Switch off delay	4 s
Power control	2 × LED
Terminal	OMY 4×1 mm²; 2×0,75 mm², l: 0,5 m
Power consumption	1,6 W
Working temperature	-25÷40°C
Dimensions	51×67×26 mm (± 1 mm)
Assembly	on wall
Ingress Protection Marking	IP20
TrueRMS	TAK