The RN-111M single-phase voltage monitoring relay.
The RN-111M 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 thresold
the minimum allowable voltage tripping thresold
time delay for load re-energizing after the circuit parameters recovery
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