Three-phase asymmetry and sequence monitors CKF-318

Three-phase asymmetry and sequence monitors CKF-318

CKF-318

Order of phase and phase loss sensor. Without neutral wire.
The CKF-318 order of phase and phase loss sensor is designed to protect electric motors powered from the three-phase network 3×400 V (without neutral wire).

Implemented security features:

- voltage asymmetry between the phases
- total loss of phase
- symmetrical voltage drop in three phases
- change the order of phases
- exceeding of the phase upper voltage threshold >480 V
- exceeding of the phase lower voltage threshold <320 v="" br="">
            


 

Functioning
With the right voltage conditions the contacts of the sensor contacts are closed.  In the event of a voltage anomaly the sensor disconnects contacts with the appropriate time-delay. Return of the network parameters to standard conditions will reactivate the contacts with the preset delay.
Indications:
Green LED [R]:
- lights - correct parameters, contact closed
- flashes - counting off the delay time of a next activation
Red LED [<U]:
- lights - voltage asymmetry or voltage below 320 V
- flashes ×1/s - incorrect phase order
- flashes ×3/s - voltage above 480 V
     




Power supply voltage3 × 400 V
Cooperation with power generatorsYES
Phase failure / asymmetry monitoringYES
Phase sequence controlYES
Contactor contact monitoringNO
The executive element2 × relay
Maximum load current2 × 8 A
Contact configuration2 × NO/NC
Separation of the contactYES
Voltage asymmetry20÷80 V
Voltage hysteresis5 V
Power control2 × LED
Switch off delay when asymmetry and decay1÷10 s
Delay of reconnection at asymmetry and decay2÷360 s
Operating voltage min. / max320 V / 480 V
Response time for voltages min. / max5 s/0,5 s
terminalscrew terminals 2,5 mm²
Tightening torque0,4 Nm
Power consumption1,6 W
Working temperature-25÷40°C
dimensions1 module (18 mm)
Assemblyon rail 35 mm
Level of securityIP20

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