Circuit breaker with parallel resistor
US5567924A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker with parallel resistor which can satisfy contradictory requirements to induce a preliminary discharge at the time of closing action and to maintain a high interelectrode insulation at the time of interrupting action has been provided in a simple and compact size. The circuit breaker of the invention includes movable unit 41 and stationary unit 31 both on the side of main contact S1, and movable unit 21 and stationary unit 11 both on the side of resistance closing contact S2, wherein the movable unit 21 on the side of the resistance closing contact S1 comprises shield 23 which is adapted either to move lagging behind the movement of movable electrode 22 or to open at its front side during closing action of the circuit breaker such that a preliminary discharge is readily generated between the movable electrode 22 and the stationary electrode 23 in precedence to the main contact. On the other hand, during interrupting action, the shield 23 returns to its original state to enclose the front end portion of the movable electrode 22 thereby to enhance its field relaxation effect and suppress any discharge therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.