Smart electronic board for wired power off call sensor
The power-off sensor outputs a normally open, normally closed switch signal when any phase of phase A, phase B, or phase C in the three-phase alternating current is detected to be powered off or the utility grid is powered off. Applicable to communications machinerooms, hospitals, power supply, customs, banks, government agencies, factories and mines and other industries. Customized smart phone or GSM SMS remote notification of the caller's power failure alarm.