DL/T 557-2021
Definition, test method and criterion of impact breakdown test in air for high voltage line insulators (English Version)
- Standard No.
- DL/T 557-2021
- Language
- Chinese, Available in English version
- Release Date
- 2021
- Published By
- Professional Standard - Electricity
- Latest
- DL/T 557-2021
- Replace
- DL/T 557-2005
DL/T 557-2021 history
- 2021 DL/T 557-2021 Definition, test method and criterion of impact breakdown test in air for high voltage line insulators
- 2005 DL/T 557-2005 Insulators of ceramic or glass material overhead lines with a nominal voltage greater than 1000V-impulse puncture tests in air
- 0000 DL/T 557-1994
