Peak demand limiter and sequencer
US5581132A · kind A · utility
Inventor
Key dates
| Filing date | Aug 4, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Aug 4, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/222
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical control system for sensing instantaneous total electrical power consumption being delivered into a facility and for interrupting selected electrical current consuming loads within the facility when the total incoming current consumption exceeds one or more preselected maximum level for a continuous first preselected time period. The system utilizes existing power transmission lines within the facility to sequentially transmit at least two pulsed digital shut down signals on each of at least two phases or legs of transmission lines within the facility to one or more remote shut down units at the end of the continuous time period. Each remote unit then interrupts electrical power to at least one electrical load within the building for a second preselected time period, after which power is restored to the electrical load until the total current consumption again exceeds one of the preselected maximum load levels continuously for the first time period. Where there are numerous electrical loads to be interrupted, each remote unit then sequentially reestablishes electrical power to each electrical load so as to avoid excessive current surge into the facility. The system als…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.