Three-phase asymmetry and sequence monitors CKF-337

Reference: CKF-337, EAN13: 5908312593225

Product description

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.

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