Molded case circuit breaker with ground fault protection and signaling switches
US5907461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1997 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Oct 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case circuit breaker is provided with ground fault protection by a modular unit which drops into a pole compartment in the molded casing in place of a pole assembly. The modular unit includes a housing forming an open faced cavity across which is mounted a printed circuit board with the ground fault circuit components and trip solenoid projecting into the cavity. The housing also supports the ground fault sensing toroid in a position for the appropriate conductors to pass through the coil. A bell switch and auxiliary switch are positioned by the housing for actuation by levers mounted on the cradle pin and crossbar, respectively. An integral leaf spring molded into the housing accommodates for manufacturing tolerances and fixes the positions of the various components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.