domestic and industrial automation

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Three-phase asymmetry and sequence monitors CKF-317

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Three-phase asymmetry and sequence monitors CKF-317

Reference: CKF-317, EAN13: 5908312593171

Product description

With adjustable actuation threshhold at 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.

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 2,5 mm²
Tightening torque	0,4 Nm
Power consumption	1,6 W
Working temperature	-25÷40°C
Dimensions	1 module (18 mm)
Assembly	on rail 35 mm
Ingress Protection Marking	IP20
TrueRMS	NIE