Electrical protection equipment with digital integration apparatus for firing pulse initiation
US4482930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Jun 11, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A non-linear resistor assembly protecting equipment such as series capacitors is itself protected by a bypass spark gap, the firing of which is produced by a digitized pulse train, each pulse of which indicates a known increment of energy input to the varistors and is processed by counters and logic gates to achieve an initiating firing pulse upon the occurrence of a predetermined number of pulses indicating the energy input has reached predetermined limits within a given time period. The initial firing pulse is further processed through stages including semiconductor device switching, trigger spark gap firing and energy dumping from an energy storage capacitor into the elements of the main bypass spark gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.