Invention Grant
- Patent Title: Electrical switching apparatus including a trip coil open circuit test circuit and system including the same
- Patent Title (中): 包括跳闸线圈开路测试电路的电气开关装置及包括其的系统
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Application No.: US12206194Application Date: 2008-09-08
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Publication No.: US08436739B2Publication Date: 2013-05-07
- Inventor: Robert T. Elms , William J. Murphy
- Applicant: Robert T. Elms , William J. Murphy
- Applicant Address: US OH Cleveland
- Assignee: Eaton Corporation
- Current Assignee: Eaton Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Eckert Seamans Cherin & Mellott, LLC
- Agent Kirk D. Houser
- Main IPC: G08B21/00
- IPC: G08B21/00
Abstract:
A circuit breaker includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip circuit including a trip coil and a fault detector. The fault detector energizes the trip coil to cause the operating mechanism to open the separable contacts. A test circuit is structured to test the trip coil and determine an open circuit condition thereof. An annunciation circuit is structured to annunciate the open circuit condition of the trip coil.
Public/Granted literature
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