Sequence phase loss sensor F&F CKF-317

Product Description

Three phase and sequence monitor is designed to protect three phase electric motors against voltage rop in at least one phase or voltage asymmetry between phases, which could damage the motor, with additional protection of motor rotation direction in case of phase change before the monitor.
Functioning :
Supplied a receiver is signalized by shine of green LED. Voltage collapse in any phase or voltage symmetry between phases above fixed actuation threshhold causes switching-OFF the motor. The motor switching-OFF occurs after delay of 4 sec, which prevents accidental motor switching-OFF caused by instantaneous voltage drop. Switching the motor ON anew occurs automatically when the voltage increases of 5V~ above activation voltage (i.e. about value of voltage hysteresis ). At occurrence of these disturbances, it is not possible to set motor in motion. In case of change of phase sequence, before the monitor, which causes change of motor rotation direction ( in relation to that primarily set) is signaled by shining red diode LED along with impossibility of switching-on the motor. The reconnection is possible after the return to correct phase sequence