Wetting current diagnostics
US9465075B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2014 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Apr 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of providing wetting current diagnostics for a load control switch includes changing test switch settings of a detection circuit from an operational configuration to a testing configuration. The test switch settings specify respective states of first and second test switches of the detection circuit. The first and second test switches are connected to a node of the detection circuit through which, in the operational configuration, a wetting current for the load control switch flows. The method includes determining whether a voltage at the node becomes no longer indicative of the operational configuration as a result of the changed test switch settings, returning the test switch settings to the operational configuration, and providing a wetting current fault indication if the voltage at the node fails to return to a level indicative of the operational configuration after returning the test switch settings to the operational configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.