On-load tap changer
US5523535A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1995 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Jan 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tap selector for an on-load tap changer includes two tap selector shafts (3, 4) made of metallic material and placed inside current collector rings (22). Movable contacts (6, 7) of the selector are supported by the shafts (3, 4) via contact holders (8) of insulating material. Between each current collector ring (22) and the shafts (3, 4) an insulating ring (21) is arranged. The fixed contacts (11) of the selector are supported by an electrically insulating, circular hollow cylinder (9) with a closed circumference, the contacts (11) being fixed to the cylinder wall by axial deformation. The cylinder (9) is provided with holes (10) for inspection and mounting. Each current collector ring (22) is connected by a screw joint to a current collector arm (24), which projects through a hole in the cylinder wall (9). Axial adjustment of the current collector arm (24) can be achieved by making the contact surfaces (25, 26) between the arm (24) and the ring (22) in the screw joint circularly curved in shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.