DL/T 557-2021 Active Industry standards-Electricity

DL/T 557-2021 DL/T 557-2021 Definition, Test Method, and Criteria for Impact Breakdown Test of Insulators in High Voltage Lines in Air

Publish Date: 2021-12-22 Implement Date: 2022-06-22 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: DL/T 557-2021

Standard Type: Industry standards

Standard Status: Active

is_force_gb: no

CCS Name: Insulator

ICS Name: Insulator

Publish Date: 2021-12-22

Implement Date: 2022-06-22

Development Information

Replace the following standards

DL/T 557-2005 Insulators of ceramic or glass material overhead lines with a nominal voltage greater than 1000V-impulse puncture tests in air

Related Standards

GB/T 4585.1-1984 Abolished

GB/T 4585.1-1984 Artificial pollution tests on high-voltage insulators to be used on a.c.systems Salt-fog method

Publish Date: 1984-07-23

GB/T 775.1-1987 Replaced

GB/T 775.1-1987 Test method for insulators—Part 1:General test methods

Publish Date: 1987-01-23

GB/T 775.3-1987 Replaced

GB/T 775.3-1987 Test method for insulators—Part 3:Mechanical test methods

Publish Date: 1987-01-23

GB/T 7253-1987 Replaced

GB/T 7253-1987 The string insulator units of the cap and pin type—Dimensions and characteristics

Publish Date: 1987-02-09

GB 12744-1991 Replaced

GB 12744-1991 Outdoor antipollution-type solid-core post insulators of ceramic material

Publish Date: 1991-03-21

GB/T 4585.2-1991 Abolished

GB/T 4585.2-1991 Artificial pollution tests on high-voltage insulators to be used on a.c.systems solid-layer method

Publish Date: 1991-06-06