Title:
【発明の名称】二重切り機構を有する回路遮断器
Document Type and Number:
Japanese Patent JPH08507653
Kind Code:
A
Abstract:
A circuit breaker includes a first section and a second section with independently operating pairs of contact assemblies in each respective section. In the first section, at least one of the contact assemblies is constructed and arranged to interrupt the current by moving from a normally closed position to a blown-open position and latching with the contact assemblies separated. The second section has a biasing extension spring for biasing the contact assemblies of the second section so as to permit interruption of the current in response to a blow-open force, which causes the contacts to separate only momentarily and then return to a normally closed position. The first and second pairs of contact assemblies separate substantially simultaneously in response to the blow-open force, and only the first section reacts to lower-level over-current conditions. In addition to the contact assemblies, the second section of the circuit breaker is designed to operate using only a spring which is "Z-axis" mountable. Other aspects of the invention include one-piece tripping actuator, a screw retainer assembly for securing the line or load terminal, a bimetal arrangement involving an improved calibration process and an associated stress-reducing line terminal.
Inventors:
Squeal, Jerry El.
Bennett, Dale W.
Sebels, Randall El.
Sortland, Matthew Dee.
Winter, John M.
Bennett, Dale W.
Sebels, Randall El.
Sortland, Matthew Dee.
Winter, John M.
Application Number:
JP51918395A
Publication Date:
August 13, 1996
Filing Date:
January 13, 1995
Export Citation:
Assignee:
Square D Company
International Classes:
H01H73/22; H01H71/24; H01H73/36; H01H71/12; (IPC1-7): H01H73/36; H01H73/22
Attorney, Agent or Firm:
Akira Asamura (3 outside)