Spring powered switch and method and apparatus for testing the same
US6354161B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Oct 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/666
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Operation of a medium voltage spring powered circuit breaker having an operating mechanism is analyzed by a test unit. The test unit includes a potentiometer having an input and a rotary shaft. A voltage source energizes the input of the potentiometer. A rotary wheel engages a driven part, such as a spring crank or a closing cam, of the operating mechanism to adjust the rotary shaft of the potentiometer and produce a variable output voltage thereof. The potentiometer tracks angular movement of the driven part and the output voltage corresponds to the variable angular movement of the driven part. A processing unit or an oscilloscope monitors the output voltage with respect to time in order to monitor the angular movement of the driven part with respect to time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.