RNPP-311-2 two-channel voltage relay
RNPP-311-2 two-channel voltage relay is a modification of the standard RNPP-311 relay. It is designed to control three-phase mains of 380V / 50Hz and to signal about full-phase and single-phase phase loss. Unlike the standard RNPP-311 it does not control phase sequence, phase coincidence and voltage imbalance.
It has two independent output channels:
- Channel 1 indicates failure of all three phases in the mains of 380 V / 50 Hz and / or overrun of all phases beyond the operating level;
- Channel 2 indicates the failure of one and / or two phases in the mains of 380 V / 50 Hz and / or their overrun beyond the operating level.