Title:
【発明の名称】中性点喪失もしくは接地喪失保護を行う地絡事故遮断器
Document Type and Number:
Japanese Patent JPH05501044
Kind Code:
A
Abstract:
A ground fault circuit interrupter is described which provides protection in the event of loss of neutral or ground, excess potential between neutral and ground and reversed input connections. Separate, independent tripping circuits are used for these latter faults and for ground faults, thus eliminating problems due to interfering signals and reducing reliance on any one component or group of components. An opto-emitter and opto-detector arrangement is used for detecting and causing tripping of a circuit breaker in the event of faults other than ground faults.
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Inventors:
Matsuoka, Joseph, M.
Application Number:
JP50826690A
Publication Date:
February 25, 1993
Filing Date:
May 17, 1990
Export Citation:
Assignee:
Square D Company
International Classes:
H02H3/16; H02H3/33; H02H3/34; H02H3/14; (IPC1-7): H02H3/14; H02H3/16; H02H3/34
Domestic Patent References:
| JPS51147734A | 1976-12-18 | |||
| JP61180552B | ||||
| JP62102249B |
Foreign References:
| US4931893A | 1990-06-05 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)