公开(公告)号：US20250132111A1

公开(公告)日：2025-04-24

申请号：US18918827

申请日：2024-10-17

Applicant: ABB Schweiz AG

Inventor： Marie Grue ,  Felix Boy ,  Magnus Nilsen ,  Stale Talmo

IPC: H01H33/666

Abstract: A vacuum circuit breaker comprises a vacuum breaker unit; and a drive unit. The drive unit includes an opening spring for biasing a movable contact of the vacuum breaker unit towards the open position; and a spring tension adjustment mechanism. The spring tension adjustment mechanism comprises an adjustment actuator; and a rigid coupling link connecting the adjustment actuator to the second end portion the opening spring. The adjustment actuator is arranged offset from an opening spring axis.