Relay type UKI-1U for 1000V

The relay is used to control the resistance of earth insulation segment excluded from the power supply (unit UKI) and the continuity of the earth line (UKU unit). The relay is designed to work in 3-phase grids with rated voltage up to 1000V AC with insulated neutral point of the transformer and devices designed to operate on the ground or underground mines working in non-hazardous explosion or non-hazardous methane and A class conditions of coal dust explosion hazard. Relay cooperates with the artificial zero system.