YD/T 940-1999
Semiconductor arrester for The over-voltage protection of telecommunications installations (English Version)
- Standard No.
- YD/T 940-1999
- Language
- Chinese, Available in English version
- Release Date
- 1999
- Published By
- Professional Standard - Post and Telecommunication
- Latest
- YD/T 940-1999
- Scope
- This standard specifies the definition, product model, technical requirements, test methods and inspection rules of semiconductor tubes for overvoltage protection of communication equipment, as well as rules for marking, packaging, transportation, storage, etc. This standard applies to semiconductor tubes used for first-level overvoltage protection in communication switching systems, and user terminals can also be used as a reference. This standard does not involve the overall dimensions of semiconductor tubes.
YD/T 940-1999 history
- 1999 YD/T 940-1999 Semiconductor arrester for The over-voltage protection of telecommunications installations
