Reduction of mechanical stresses on turbosets upon occurrence of three-pole mains short circuits near generators
US4042963A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Jan 20, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reducing the mechanical stresses on the shaft of a turboset and on the shaft of the generator coupled thereto upon the occurrence of a three-pole mains short circuit near the generator and upon the subsequent elimination of the three-pole short circuit. A generator switch is connected between the output of the generator and the mains, and a resistor, whose size is adapted to the size of the load on the generator, is connected in parallel with the generator switch. The generator switch is opened upon the occurrence of a short circuit to switch the resistor into the load circuit of the generator and the resistor is again bridged when the short circuit is switched off of the mains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.