DOUBLE-TRACK SECTION AC POWER SUPPLY Russian patent published in 2013 - IPC B60M3/02 

FIELD: transport.

SUBSTANCE: invention relates to AC electrified railways, particularly, to single-phase traction using equipment and three-phase local using hardware. Proposed device comprises three-phase AC source with grounded neutral, 1^st, 2^nd and 3^rd traction substations with three-phase transformers with their primaries interconnected in star circuit with grounded neutral and connected to feed lines, two secondaries of each transformer interconnected in star circuit and delta circuit, contact suspension of the first and second tracks with neutral adapters. Transformer secondaries connected in start circuit with neutral are used to feed traction hardware. Note here that neutral of secondary connected in star circuit at every transformer substation is connected to grounded track circuit. Substation contact suspensions are separated by neutral adapters on both sides and connected to output terminal of secondary connected in star circuit of near traction substation. Local using hardware are connected to secondaries connected in delta circuit.

EFFECT: higher power of traction transformers.

5 dwg