The voltage relay monitors the circuit parameters in real time and protects loads against unacceptable swings in the supply voltage.
The РН1 and РН2 voltage relays are used in power-system protection and automation schemes, in supply intake equipment, and to protect industrial and domestic equipment fed from a single-phase DC or AC network.
The РН1.5, РН1.12, РН1.24 and РН1.48 voltage relays are used in renewable energy and in supply intake equipment, to protect DC-fed equipment and domestic appliances.
Key features
A compact unit combining an undervoltage relay, an overvoltage relay, two time relays and a digital voltmeter.
The RMS voltage is determined accurately by sampling the voltage many times during every mains cycle and processing the results mathematically in real time.
Programmable upper and lower voltage trip thresholds.
Programmable hysteresis (reset ratio), set separately for the lower and upper thresholds.
Programmable delay, set separately for relay operation and reset (load off and on)
Digital display of the monitored voltage (on РН1).
One normally open and one normally closed galvanically isolated contact.
Relay state shown by a two-colour LED.
Limits and settings can be programmed with the buttons and the three-digit display on РН1.
Fixed settings, specified when ordering, for РН2.
Needs no control power — it is fed from the monitored network.
The relay is a universal version working over a wide range of monitored DC and AC voltages.
DIN-rail mounting, modern European styling.
The РН1 and РН2 voltage relays replace a wide range of voltage relays from various manufacturers: НЛ-4; НЛ-5; НЛ-6; НЛ-6А; НЛ-7; НЛ-8; НЛ-9; НЛ-18-1; НЛ-18-2; НЛ-19; РН53, РН54, РН153, РН154, РСН12, РСН14, РСН15, РСН16, РСН17, РСН14М, РСН15М, РСН16М, РСН17М; РСН50; РН101; РН111; РН112; РКН-1.
