Brownout solution for electromechanical automatic transfer switch
US8022579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2008 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Oct 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for dynamically increasing the drop-out voltage of an electromechanical automatic transfer switch (ATS) into a brownout voltage range is provided. The automatic transfer switch includes a first input, a first coil connected to the first input, and a first, normally-open auxiliary contact in magnetic communication with the first coil. The circuit includes a first resistor adapted to connect to the first, normally-open auxiliary contact, and a first transformer having a primary winding connected to the first resistor, and a secondary winding adapted to connect to the first coil. An operating voltage across the first coil is reduced a proportional amount by a secondary voltage across the secondary winding when the first, normally-open auxiliary contact is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.