Method to detect operational state of remote disconnect latching relay
US10854407B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 2018 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | Nov 10, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2047/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and system for monitoring a state of a relay switch. The method applies a voltage signal to a solenoid of the relay switch for actuation of the relay switch, monitors over time current flowing through the solenoid after application of the voltage signal, and calculates a back-emf voltage impressed on the solenoid based on an inflection in the current occurring as a plunger of the relay switch moves. The system includes a voltage source, at least one solenoid solenoid having a plunger, a switch connected to the plunger, and a controller configured to data log the voltage applied to the solenoid and the current flowing through the solenoid upon application of the voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.