Invention Grant
- Patent Title: Ground fault monitoring device for an electrical power distribution system
- Patent Title (中): 配电系统接地故障监测装置
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Application No.: US043373Application Date: 1993-04-06
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Publication No.: US5402071APublication Date: 1995-03-28
- Inventor: Patrick Bastard , Michel Meunier
- Applicant: Patrick Bastard , Michel Meunier
- Applicant Address: FRX both of FRX both of
- Assignee: Gerin; Merlin,Ecole Superieure d'Electricite
- Current Assignee: Gerin; Merlin,Ecole Superieure d'Electricite
- Current Assignee Address: FRX both of FRX both of
- Priority: FRX9205346 19920428
- Main IPC: H02H3/38
- IPC: H02H3/38 ; G01R31/02
Abstract:
The monitoring device comprises a measuring channel of the ground fault voltage, a measuring channel of the ground fault current, and a digital processing circuit whose role is to search for and indicate the presence of a ground fault. The processing circuit determines the fundamental parts of the ground fault current and voltage to compute the phase difference .phi. between the two parts and the cos .phi. value. The evolution of this phase difference is representative of a fault.
Public/Granted literature
- USD375784S Shower faucet Public/Granted day:1996-11-19
Information query
