CZF2 F&F phase loss sensor
- CZF2 F&F phase loss sensor
CZF2 F&F phase loss sensor
Product description
With fixed voltage asymmetry tripping threshold. 1 x NO contact.
Phase loss sensor with contactor contacts control is designed to protect electric motors supplied from a three-phase network in cases of voltage loss in at least one phase or voltage asymmetry between phases and damage to the contacts of the switching contactor threatening to destroy the motor.
Operation
Voltage loss in at least one, any phase or voltage asymmetry between phases above the tripping threshold will cause the motor to shut down. The shutdown will occur with a delay of 4 s, which prevents the motor from being disconnected during a momentary voltage drop. Reconnection will occur automatically when the voltage rises by 5 V above the trip voltage (i.e., by the voltage hysteresis value). Failure of any of the contacts of the motor switching contactor will result in permanent shutdown of the motor. Restarting is possible only after the power supply is completely disconnected, the contactor fault is corrected and the motor is switched on again.
| Supply voltage | 3 × 400 V + N |
| Cooperation with generators | NO |
| Control of phase loss / asymmetry | YES |
| Phase sequence control | NO |
| Contactor contacts control | YES |
| Executive element | relay |
| Maximum load current | 10 A |
| Contact configuration | 1 × NO |
| Contact separation | YES |
| Tripping voltage asymmetry | 45 V |
| Voltage hysteresis | 5 V |
| Cut-off delay | 4 s |
| Power control | 2 × LED |
| Connection | screw terminals 1.5 mm² |
| Tightening torque | 0.4 Nm |
| Power consumption | 1,6 W |
| Operating temperature | -25÷40°C |
| Dimensions | 95 mm x 60 mm x 25 mm |
| Mounting | surface mounted |
| Degree of protection | IP20 |