Enclosed switchboard having instruments needed for regular inspection and operation mounted on a middle level door
US4249227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1979 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Mar 15, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02B11/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An enclosed switchboard in which an upper chamber and a lower chamber are formed within a switchboard frame in the form of a box for accommodating electrical apparatus such as circuit breakers. At the free surfaces of the frame facing the two chambers a top level door and a bottom level door facing the two chambers are mounted so as to be capable of being opened and closed separately from one another. A middle level door for the mounting of instruments is mounted between the top level door and bottom level door, and instruments needed for regular inspection and control, for instance meters, operating switches, indicator lamps and the like, are mounted on the door surface of the middle door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.