发明授权
- 专利标题: Electrical energy meter for 3-wire delta service
- 专利标题(中): 3线三角形服务电能表
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申请号: US482005申请日: 1995-06-07
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公开(公告)号: US6097182A公开(公告)日: 2000-08-01
- 发明人: Rodney C. Hemminger , Mark L. Munday , Fred F. Schleifer
- 申请人: Rodney C. Hemminger , Mark L. Munday , Fred F. Schleifer
- 申请人地址: NC Raleigh
- 专利权人: ABB Power T&D Company Inc.
- 当前专利权人: ABB Power T&D Company Inc.
- 当前专利权人地址: NC Raleigh
- 主分类号: G01R21/133
- IPC分类号: G01R21/133 ; H02M3/335 ; G01R21/06
摘要:
An electronic energy meter for use with a 3-wire delta service having a resistive voltage divider for sensing and scaling the line voltages is disclosed. The resistive voltage divider includes three resistive dividers, one being associated with each phase of the electrical energy being metered. Each resistive divider includes a current limiter for reducing the current into the meter to a safe level when the meter electronics are operating at an elevated level, and a resistor for scaling the line voltage to a predetermined maximum peak-to-peak value. The scaled voltage that is generated has minimal phase shift, and therefore, does not require phase shift compensation prior to processing by a processing system of the electronic meter.
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