公开(公告)号：US10446340B2

公开(公告)日：2019-10-15

申请号：US15539649

申请日：2015-12-24

Applicant: ABB Schweiz AG

Inventor： Anil Talluri ,  Anoop Parapurath ,  Urmil Parikh

IPC: H01H9/56 ,  H02H7/26 ,  H02H7/04 ,  H02H9/00 ,  H02H3/06

Abstract: In aspects, the present invention provides a method for controlled energizing of a transformer (150) being connected to a first electrical subsystem (110) through a first circuit breaker (140). The method comprises acquiring electrical current waveform in a first phase of the transformer during a closing operation of the first circuit breaker at an instance for switching determined by a controller (130), determining a first peak (310) in the current in the first phase within a first predetermined time window (Tpw), calculating a first correction factor for adjusting the instance for switching in the first phase, and adjusting the instance for switching based on the calculated first correction factor for performing a next controlled energization at the adjusted instance of switching in the first phase.