AT Feeding System - AT Feeding System

Japanese: AT き電方式 - えーてぃーきでんほうしき
AT Feeding System - AT Feeding System

...On the other hand, with AC, the voltage can be changed by electric cars, so the voltage supplied to the electric cars can be increased and the interval between substations can be increased. However, when AC flows through the rails, if current leaks from the rails to the ground, it can cause inductive interference with communications. To prevent this, the BT feeding method, which uses a suction transformer to suck up the rail current to the negative conductor, and the AT feeding method, which uses an autotransformer to offset the rail current with the feeding current, are widely used. In Japan, the BT method was used in early AC electrification, but in recent years it has been replaced by the AT method. ...

*Some of the terminology used in reference to the "AT feeding system" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…一方,交流の場合には電気車で電圧を変更できるため,電気車への供給電圧を高くでき変電所間隔を長くすることが可能である。ただし,レールに交流が流れるときにレールから大地に電流が漏れると通信誘導障害が生ずるので,漏れ電流を防ぐためレール電流を吸上変圧器によって負き電線に吸い上げるBTき電方式,および単巻変圧器を用いてレール電流をき電電流で相殺するATき電方式が広く採用されている。日本では初期の交流電化はBT方式で,近年はAT方式となっている。…

※「AT き電方式」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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