The RN-112 universal electronic maximum/minimum voltage relays are designed to monitor allowable voltage value and voltage presence with rated parameters 100V/ 50Hz as well as to switch electric curcuits in protection and automation devices of electric installations where the nominal voltage is above 1000V.
The relay provides adjustments of trip settings for voltage and time delay when voltage threshold values are reached. The relay provides three modes of operation:
- the minimum voltage relay mode (the relay trips only when the minimum voltage threshold is reached);
- the maximum voltage relay mode (the relay trips only when the maximum voltage threshold is reached);
- the symmetry settings mode (the relay trips when both the maximum and the minimum voltage thresholds are reached).
FEATURES
- the digital microprocessor device;
- doesn't need any auxiliary power supply because it's self-powered by the voltage to be monitored;
- impulse-noise immunity is provided;
- hysteresis is approximately 5-6V;
- mounted on a standard DIN rail, mounting position is arbitrary;
- any of three modes of operation can be selected by changeover switch;
- a wide range of adjustments for each setting:
- for U min: 100–(from 5 to 50V);
- for U max: 100+(from 5 to 50V);
- for trip delay: from 0,1 to 10 sec.
- adjustable setting ranges can be changed, on request;
- there are two groups independent output contacts (3-4, 5-6): in «dead» status (the relay is not alive, it's not connected) the 3-4 contacts are closed and the 5-6 contacts are open;
- LED indicators for relay status signalling that input voltage is present and output contacts have changed over;
- due to digital technology the relay settings are calibrated quite accurate so they can be set without a control voltmeter.
