DEVICE FOR MAXIMUM CURRENT PROTECTION OF ELECTRIC INSTALLATIONS Russian patent published in 2016 - IPC H02H3/08 

FIELD: electric power engineering.

SUBSTANCE: use: in electric power engineering. Device for overcurrent protection of electrical installations comprising three devices for fastening and regulation, each of which is intended for respective phases A, B, C, comprises a threaded rod, which is worn ram, one end of rod is inserted into hollow cylinder, which is rigidly secured to strip such that it is perpendicular to rod and secured to bracket plate which is attached to housing of the withdrawable switchgear assembly. To strip parallel to rod, on opposite sides thereof, are attached two slats, on outside of which a scale is applied. On said slats are worn a plate through vertical slots therein, cross-sectional plane perpendicular to busbar and capable of moving on rails relative to busbar. On outer side of plate there are six reed switches attached at same distance from each other and at different angles to cross-sectional plane of busbar. Reeds of all devices for attachment and adjustment of timing input are connected to unit, which is connected to output of actuation unit.

EFFECT: technical result is provision of regulatory protection operation settings in compartments of cell complete switchgears of 6-10 kV.

1 cl, 4 dwg