Draw-out circuit breaker unit with coordinated cable interlock and shutter
US5486978A · kind A · utility
47Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Nov 4, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/262
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cable interlock actuated by a plunger extended from the back of a draw-out circuit breaker when the breaker is closed, prevents closure of a second circuit breaker by holding it in the trip condition. A shutter which closes to prevent access to power system terminations at the rear of the draw-out circuit breaker enclosure when the breaker is removed, blocks operation of the interlock to prevent tripping of the other circuit breaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.