公开(公告)号：US20250158389A1

公开(公告)日：2025-05-15

申请号：US18506795

申请日：2023-11-10

Applicant: ABB Schweiz AG

Inventor： Paul Thomas Yerly ,  Thomas Anthony Kendzia, III ,  Christopher Alan Belcastro ,  Veerakumar Bose

IPC: H02H7/22 ,  H02J3/12

Abstract: Systems and methods for a transfer switch including a first switch device at a first leg between a first power source and an electrical load, and a second switch device at a second leg between a second power source and the electrical load and a first resistor circuit including a third switch device connected to the first leg. The third switch device switches between open and closed states in response to the state of the first switch device to limit back feed voltage generated as a result of leakage current when the first power source is inactive. The system may also include a second resistor circuit including a fourth switch device connected to the second leg. The fourth switch device switches between open and closed states in response to the state of the second switch device to limit back feed voltage as a result of leakage current when the second power source is inactive.