公开(公告)号：US11927618B2

公开(公告)日：2024-03-12

申请号：US17929091

申请日：2022-09-01

Applicant: Eaton Intelligent Power Limited

Inventor： Elise Morskieft ,  Marcel Van Dijk ,  Vijay Kumar ,  Yogesh Rajwade

IPC: G01R31/08 ,  G01R31/12

CPC classification number: G01R31/1254

Abstract: A method of predicting a lifetime of a gas filling of an electrical switchgear is disclosed, wherein pressure values p1, p2 in a system of the electrical switchgear containing the gas filling at a predefined temperature Tp at different points in time t1, t2 are measured. Based on the pressure difference Δp between the pressure values p1, p2 the lifetime of the gas filling is calculated. Alternatively, the pressure values p1, p2 can be taken at temperatures T1, T2 within a predefined temperature range at different points in time t1, t2.

公开(公告)号：US11086091B2

公开(公告)日：2021-08-10

申请号：US16332831

申请日：2017-09-14

Applicant: EATON INTELLIGENT POWER LIMITED

Inventor： Marcel Van Dijk

IPC: G02B7/02 ,  G02B7/00 ,  H01H1/00 ,  H01H9/02

Abstract: A sight glass for mounting in a hole, provided with radially inwardly extending protrusions, in a sheet material wall of a housing, for example a switchgear housing, includes: a body with a mounting surface and a cylindrical wall arranged on the mounting surface and extending perpendicularly from the mounting surface; a plurality of L-shaped slots in the radially outer surface of the cylindrical wall; and a gasket arranged on the mounting surface, the gasket enclosing the cylindrical wall. The body and cylindrical wall are of a monolithic transparent material.