Meidensha Scott Connection/ Roof Delta Connection Transformer

Manufacturer: Meidensha Corporation
Model: Scott Connection/ Roof Delta Connection

Features

Railway feeding systems demand high-capacity, single-phase AC power. To comply with Japanese regulations banning direct single-phase extraction from high-voltage lines, we utilize specialized connection transformers. These systems efficiently generate two single-phase outputs from a three-phase supply without causing voltage fluctuations or unbalance on the receiving grid.
Housing-Free Design: Employs integrated soundproof walls for effective noise reduction without extra housing.
Compact Footprint: Optimized via advanced electric field strength analysis technology.
Scott-Connection Transformer: Full insulation design eliminates the need for a surge arrester.
Roof-Delta Connection Transformer: Delivers lower energy losses and a more compact design than conventional modified Woodbridge connections.

Applications and Solutions

Scott-connection transformer
Operators apply this transformer to neutral non-grounded high-voltage power networks (11 kV to 154 kV or less).
Roof-delta connection transformer
Operators apply this transformer to neutral-grounded ultra-high-voltage power networks (187 kV or less).

Specifications

Roof-delta connection transformer

ItemRated specification
ApplicationFor power feeding a Shinkansen train
TypeOil immersed self-cooling type (with a soundproof wall)
Rated capacity70MVA
Rating type300% 2 min
Rated primary voltage220kV
ConnectionRoof-delta connecti

154 kV Scott-connection transformer

ItemRated specification
ApplicationFor power feeding a Shinkansen train
TypeOil immersed self-cooling type (with a soundproof wall)
Rated capacity50MVA
Rating type300% 2 min
Rated primary voltage154kV
ConnectionScott connection

Scott-connection transformer

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