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CKF-320-TRMS Phase Sequence and Loss Sensor
The phase sequence and phase loss sensor is designed to protect electric motors and other equipment powered by a three-phase mains supply. The sensor will activate if the voltage on one or more phases falls below a set minimum value or exceeds a set maximum value. The CKF-320-TRMS also monitors the phase sequence of the supply, preventing the motor from rotating in the wrong direction.
The phase sequence and phase loss sensor is designed to protect electric motors supplied from a three-phase mains supply in the following situations:
• a loss of voltage in at least one phase;
• a voltage drop in at least one phase below the set value;
• voltage rise in at least one phase above the set value
• incorrect phase sequence.
Disconnection is carried out with a set delay to avoid accidental shutdowns due to temporary mains disturbances.
By measuring the true root mean square (TrueRMS) voltage, the sensor ensures correct operation even when operating in a heavily disturbed mains supply.
- 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 powered by a three-phase mains supply. The sensor will activate if the voltage on one or more phases falls below a set minimum value or exceeds a set maximum value. The CKF-320-TRMS also monitors the phase sequence of the supply, preventing the motor from rotating in the wrong direction.