Preventive maintenance tapping and duty cycle monitor for voltage regulator
US7915766B2 · kind B2 · utility
8Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2008 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jul 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/0061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The life of load tap changer contacts is monitored by detecting an arcing event; identifying arcing surfaces involved in the arcing event; calculating a per-unit loss of life for the identified arcing surfaces as a result of the arcing event; updating estimates of cumulative erosion for the arcing surfaces; comparing the updated estimates of cumulative erosion to a first threshold value; and signaling for action when at least one of the updated estimates of cumulative erosion exceeds the first threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.