公开(公告)号：US20160149396A1

公开(公告)日：2016-05-26

申请号：US14550394

申请日：2014-11-21

Applicant: ABB AB

Inventor： Elisabeth Lindell ,  Lars Liljestrand ,  Felix Greuter

IPC: H02H9/00 ,  H02H9/04

CPC classification number: H02H9/005 ,  H01F27/343 ,  H01F27/40 ,  H02H9/04

Abstract: A system for transient over voltage protection of a three-phase transformer. Two surge arresters are series connected across each winding of the transformer and the center point connection of the two surge arresters is electrically connected to a middle location of the winding. Three additional surge arresters are electrically connected from each phase to ground in the case of either a delta or Y connected transformer; and/or connected from a neutral point to ground in the case of a Y connected transformer. The system allows for all of the surge arresters to be packaged as an integrated surge arrester system to minimize induced transient over voltages and high stresses on the transformer winding due to internal resonances.

Abstract translation: 一种三相变压器瞬态过电压保护系统。 两个避雷器串联连接在变压器的每个绕组上，两个避雷器的中心点连接电连接到绕组的中间位置。 在三角形或Y型连接的变压器的情况下，三个额外的避雷器从每个相电连接到地; 和/或在Y连接的变压器的情况下从中性点连接到地。 该系统允许将所有的避雷器作为集成的避雷器系统进行封装，以使由于内部谐振引起的瞬态过电压和变压器绕组上的高应力最小化。