Charging protection circuit of transformer station

The invention discloses a charging protection circuit of a transformer station. The circuit comprises a closing loop, an opening loop, a protection loop and a locking loop, the opening loop comprises a time relay contact switch in serial connected with a first switching pressure plate, the protection loop comprises a third switching pressure plate and a time relay coil, the third switching pressure plate is in parallel connection with a manually closing relay contact switch, and the time relay coil is connected in serials with a second switching pressure plate. When long-delay charging protection is needed, it is only required to close the third switching pressure plate to realize long-delay charging protection for the transformer station, the possible safety problem caused by that a short-circuit wire is used to short the relay contact switch temporarily is reduced, and the operation safety during long-delay charging protection of the transformer station is improved. 本发明公开了种变电站充电保护电路，该电路包括：包括合闸回路，分闸回路，保护回路和闭