公开(公告)号：US10074972B2

公开(公告)日：2018-09-11

申请号：US14688328

申请日：2015-04-16

Applicant: ABB TECHNOLOGY AG

Inventor： Karl-Heinz Hartung ,  Ralf Bockholt ,  Volker Grafe

IPC: H02H9/02 ,  H02H3/08 ,  H02H3/44 ,  H02H7/04 ,  H02H7/26 ,  H02H7/28

CPC classification number: H02H9/02 ,  H02H3/08 ,  H02H3/083 ,  H02H3/44 ,  H02H7/042 ,  H02H7/267 ,  H02H7/28

Abstract: An exemplary electrical network in form of a ring system includes a plurality of infeed transformers which are arranged in parallel between a sourcing busbar/cable system and a ring load busbar/cable system. A junction point connects each infeed transformer to the ring load busbar/cable system. The network includes a plurality of current limiters, where each current limiter is positioned between two junction points. Upon a fault event of an infeed transformer, two current limiters on both sides of a respective junction point of the faulted infeed transformer are simultaneously tripped in order to reduce current in the ring load busbar/cable system.