DL/T 557-2021 English PDF

US$349.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
DL/T 557-2021: (Definition, test method and criterion of impact breakdown test in air for high voltage line insulators)
Status: Valid

DL/T 557: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
DL/T 557-2021	349	Add to Cart	3 days	(Definition, test method and criterion of impact breakdown test in air for high voltage line insulators)	Valid
DL/T 557-2005	519	Add to Cart	3 days	Insulators of ceramic or glass material overhead lines with a nominal voltage greater than 1000V-impulse puncture tests in air	Obsolete
DL/T 557-1994	359	Add to Cart	3 days	Insulators of Ceramic or Glass Material Overhead Lines with A Nominal Voltage Greater than 1000V - Impulse Tolerance Tests in Steep Wave	Obsolete

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DB35/T 1753   DB12/ 356   DL/T 627   DL/T 374.2   DL/T 376   DL/T 374.1   

Basic data

Standard ID: DL/T 557-2021 (DL/T557-2021)
Description (Translated English): (Definition, test method and criterion of impact breakdown test in air for high voltage line insulators)
Sector / Industry: Electricity & Power Industry Standard (Recommended)
Classification of Chinese Standard: K48
Word Count Estimation: 15,127
Date of Issue: 2021-12-22
Date of Implementation: 2022-06-22
Older Standard (superseded by this standard): DL/T 557-2005
Issuing agency(ies): National Energy Administration

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