公开(公告)号：US20220059297A1

公开(公告)日：2022-02-24

申请号：US17404287

申请日：2021-08-17

申请人： ABB Power Grids Switzerland AG

发明人： Jakub Korbel ,  Matt Cuppett ,  Brian Christopher ,  Richard Thomas ,  Sami Kotilainen ,  Staffan Jacobsson ,  Benny Wedin ,  Francesco Agostini

IPC分类号： H01H3/38

摘要： Provided is a spring drive cam for a spring drive of a circuit breaker including a disc-like shape configured for rotating around a rotation axis in the spring drive, whereby the disc-like shape comprises a radius (R) that changes depending on an angle (α) of the radius (R) relative to a base angle (α0), and whereby a rate (dR/dα) defined by a change of the radius (R) per change of the angle (α) is ≤0.3 mm/°.