DIFFERENTIAL PROTECTION DEVICE Russian patent published in 2022 - IPC H02H3/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering for the protection of power transformers. The differential protection device contains an actuating device, AC current lines, which are the current-carrying buses of the indoor switchgear and switchgear cells, three reed switches with control windings, two adjustable resistors. The device includes a plate for attaching reed switches, the first, second and third clamps for attaching reed switches to the plate, the first and second supporting racks, a power transformer switch-off coil, a protection panel for the ZRU-110 kV indoor switchgear cell, six inductors, three reed control windings, six voltage amplifiers, four adjustable resistors, a connecting cable, a circuit breaker, intermediate and indicating relays, the first and second contact cores of the closing contact of the reed switches, a voltage amplifier unit and a relay unit. The second supporting rack with the second and third clamps makes it possible to move the inductors relative to the cross-sectional plane of the current-carrying buses, thereby providing additional adjustment of the differential protection pickup settings.

EFFECT: simplification of the technical implementation of the protection device.

1 cl, 8 dwg