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Lifeng Yang
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Coral Springs, FL, US
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last 30 patents
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Patent Grant
Protective relay with improved DFT function
Patent number
5,909,656
Issue date
Jun 1, 1999
ABB Power T&D Company Inc.
Lifeng Yang
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Adaptive quadrilateral characteristic distance relay
Patent number
5,796,258
Issue date
Aug 18, 1998
ABB Power T&D Company, Inc.
Lifeng Yang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Fault type classification algorithm
Patent number
5,783,946
Issue date
Jul 21, 1998
ABB Power T&D Company Inc.
Lifeng Yang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
One-terminal fault location system that corrects for fault resistan...
Patent number
5,773,980
Issue date
Jun 30, 1998
ABB Power T&D Company, Inc.
Lifeng Yang
G01 - MEASURING TESTING