Electrical power control system for lighting systems
US6031335A · kind A · utility
Inventor
Key dates
| Filing date | Jan 17, 1997 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Jan 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical power system to provide a selected voltage to a load such as a fluorescent lighting system is characterized by a winding 3 having a positive end connected to a positive rail and is tapped at a predetermined position for supplying an output terminal with a selected voltage. A first relay contact can electrically connect a neutral end of the winding to a neutral rail to provide one selected voltage or a second relay contact can electrically short-circuit a predetermined number of turns of the winding in response to a request for a second selected voltage. When a fault condition is monitored, a third relay contact can electrically short-circuit the neutral end of the winding to the predetermined position to put the system into a failsafe condition which prevents turns of the winding being open circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.