公开(公告)号：US20220337048A1

公开(公告)日：2022-10-20

申请号：US17858253

申请日：2022-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qingying LIU ,  Kui LI ,  Feng NIU ,  Zijian XU ,  Chenyu XIE

IPC: H02H3/10 ,  H02H1/00

Abstract: An over-energy protection circuit, a residual current device, an electronic device, and a power distribution box. The protection circuit has relatively high operating reliability, and includes: a first over-energy absorption circuit, a second over-energy absorption circuit, and a residual current determining circuit. The first over-energy absorption circuit receives a first electrical signal output from a current transformer; and when a voltage value of the first electrical signal is greater than or equal to a first preset threshold, performs step-down processing on the first electrical signal to obtain a second electrical signal, and outputs the second electrical signal to the second over-energy absorption circuit; or when a voltage value of the first electrical signal is less than a first preset threshold, outputs the first electrical signal to the second over-energy absorption circuit.