Automatic power bus transfer equipment
US4811163A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Jan 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for protecting the power contacts (18, 20) of automatic bus transfer equipment, including high speed solid state switches (30, 32) connected across the respective contacts. A timing and steering circuit (36) is responsive to the electrical energization of a solenoid (22) for firing the solid state switch (32) connected across the closed contact (18). A timer (48) is responsive to the opening of the contacts (18). At the elapse of a time period, the firing circuit (34) is caused to operate the solid state switch (30) before the closing of the contacts (20). The solid state switch (30) is maintained operated for a predetermined period of time by a timer (90).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.