DiversiTech DSP-1 Single Phase Line Voltage Monitor

SP-1 is an automatic voltage monitor and controls for three phase powered equipment. By continuously measuring the incoming line voltage, this monitor will detect any voltage outside the tolerances you set. If the limits that you set are exceeded, the response timer will begin counting. You also have the flexibility to set the response timer -- a shorter time may be desired to avoid nuisance tripping. If the voltage remains outside the tolerance after the response time has elapsed, the DSP-1 will turn off its output relay and protect your device. While the output is off, an additional delay timer is activated to avoid rapid re-starts.