Fault current protection device for monitoring an electric load for a vehicle, and method for carrying out a self-test of a fault current sensor
US10985549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2016 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Oct 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/044
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A residual current sensor for a residual current protective device for monitoring an electrical load for a vehicle is presented. The residual current sensor has an electrical circuit for identifying a test signal in an electrical forward conductor, which forward-conducts from a control apparatus for controlling the electrical load to the electrical load the test signal represents a request to perform a self-test of the residual current sensor. The residual current sensor also has a residual-current-generating apparatus for generating a test residual current in an electrical reverse conductor, which conducts away from the electrical load, in response to the identified test signal. The residual current sensor furthermore has a measuring apparatus for measuring a differential current between a first electric current in the electrical forward conductor and a second electric current in the electrical reverse conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.