Method for detecting insufficient contact pressure in a switching unit, device for implementing such a method, and switching unit including such a device
US11211218B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2019 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Feb 19, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/044
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for detecting insufficient contact pressure between two contacts of an electrical switching unit, including a device for resetting a mechanism for controlling the switching unit following a closure maneuver of the mechanism, the resetting device including a motor configured to complete the closure maneuver of the control mechanism. The method involves detecting whether the motor completes the closure and whether a resetting torque corresponds to a normal resetting torque, by analyzing an envelope curve of current consumed by the motor over time, and, if the motor completes the closure, deducing that a wear is a result of wear in the mechanism or a kinematic chain, and if the motor completes the closure and the resetting torque corresponds to an abnormal rescuing torque, deducing that the wear corresponds to wear in the motor or parts involved in compressing the closure spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.