Three-phase panelboard using standard rated three-pole circuit protective devices in a grounded delta system
US5206777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Sep 23, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02B1/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A neutral connector of a standard three-phase, three-wire panelboard is replaced by a specific multiple termination assembly having a limited number of terminations specifically adapted for connection to ground at the panelboard, for grounding the termination assembly to the panelboard enclosure, and for connecting the multiple termination assembly to the power conductor of the system grounded phase which is also connected to one pole of the main circuit breaker, main switch or main lug of the panelboard. Standard AIC rated three-pole circuit breakers or fusible switches are wired to three-phase loads in the branch circuits and connected to the three bus bars of the panelboard to connect the grounded phase to the load through the circuit breaker or switch, and to open all phases when operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.