PH-102 Voltage Monitoring Relay

The PH-102 voltage monitoring relay is designed to de-energize an industrial/appliance single-phase 220V/50Hz load in case of inadmissible voltage variations in the mains with subsequent automatic re-energizing after the circuit parameters recovery. Load is connected to the relay either directly via relay terminals or through a magnetic starter, depending on the wattage. The relay can operate in four independent modes: Voltage monitoring relay Minimum voltage monitoring relay Maximum voltage monitoring relay Time relay with a restart delay. The device front panel features load status indicator (on/off) and three-digit, seven-segment display, which displays (depending on the device status): Actual RMS voltage; Accurate value of the set-up parameter; Time remaining till automatic load re-energizing; Emergency de-energizing the load (RMS voltage flashing). The variable pot knobs on the front panel allow for setting: The maximum allowable voltage tripping threshold; The minimum allowable voltage tripping threshold; Time delay for load re-energizing after the circuit parameters recovery. The PH-102 equipment includes a surge protector which protects the switched load against high-frequency and high–voltage impulse interference.