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Three-phase asymmetry and sequence monitors CKF-319 True RMS
The phase sequence and phase loss sensor is designed to protect electric motors and other equipment supplied from a three-phase mains. The sensor will trip when the voltage on one or more phases falls below a set minimum value or exceeds a set maximum value. The CKF-320-TRMS also controls the phase sequence of the supply, preventing the motor from spinning in the wrong direction.
The phase sequence and phase loss sensor is designed to protect an electric motor supplied from a three-phase network in cases of:
- voltage loss in at least one phase;
- Voltage drop in at least one phase below the preset value;
- voltage increase on at least one phase above the preset value
- incorrect phase sequence.
The disconnection is performed with a preset delay to avoid accidental disconnections for momentary disturbances in the network.
Thanks to the measurement of the real effective voltage value (TrueRMS), the sensor guarantees correct operation even when operating in a heavily disturbed mains.
- 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
- 2 × 8 A
- Contact configuration
- 2 × NO/NC
- Separation of the contact
- YES
- Minimalne napięcie fazy
- 150 V
- Maksymalne napięcie fazy
- 280 V
- Adjustment range of the lower voltage threshold
- 180÷220 V
- Adjustment range of the upper voltage threshold
- 240÷280 V
- Voltage hysteresis
- 5 V
- Power control
- 2 × LED
- Switch off delay when asymmetry and decay
- 1÷10 s
- Switch off delay in the absence of phase
- 1 s
- 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
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The phase sequence and phase loss sensor is designed to protect electric motors and other equipment supplied from a three-phase mains. The sensor will trip when the voltage on one or more phases falls below a set minimum value or exceeds a set maximum value. The CKF-320-TRMS also controls the phase sequence of the supply, preventing the motor from spinning in the wrong direction.