Electrical switching apparatus employing twice-energized trip actuator
US6061217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker includes separable contacts for movement between a closed position and an open position to switch electrical current. An operating mechanism moves the separable contacts between the closed and open positions. A sensor senses the electrical current and outputs a sensed current signal corresponding to the electrical current. A shunt shunts a portion of the electrical current. A trip mechanism employs the sensed current signal to produce a trip signal. A trip actuator trips the operating mechanism to move the separable contacts to the open position. The trip actuator includes a trip solenoid having a coil energized by the trip signal and also includes one or more loops energized by the shunted portion of the electrical current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.