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DL/T 620-1997 PDF English

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DL/T 620-1997: Overvoltage protection and instilation coordination for AC electrical installations
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DL/T 620-1997English1889 Add to Cart 3 days [Need to translate] Overvoltage protection and instilation coordination for AC electrical installations

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Basic data

Standard ID DL/T 620-1997 (DL/T620-1997)
Description (Translated English) Overvoltage protection and instilation coordination for AC electrical installations
Sector / Industry Electricity & Power Industry Standard (Recommended)
Classification of Chinese Standard K45
Word Count Estimation 59,530
Date of Issue 4/21/1997
Date of Implementation 10/1/1997
Older Standard (superseded by this standard) SDJ 7-1979; SD 119-1984
Summary This standard specifies the methods and requirements for nominal voltage 3kV ~ 500kV AC system electrical installations over-voltage protection; provide contrast, white insulation withstand voltage or average (50%) discharge voltage selection process, and gives electrical equipment usually used withstand voltage and high-voltage overhead transmission lines and distribution equipment insulators, recommended air gap.

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