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Three-phase voltage-sensitive relays

RNPP-311-2 two-channel voltage relay

RNPP-311-2 two-channel voltage relay is a modification of the standard RNPP-311 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.

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