UL 497A BULLETIN-2007 标准详情
- 标准号:UL 497A BULLETIN-2007
- 中文标题:UL安全标准.通信电路用次级保护器
- 英文标题:UL Standard for Safety Secondary Protectors for Communication Circuits
- 标准类别:美国保险商实验室UL
- 发布日期:2007
The requirements cover secondary protectors for use in single- or multiple-pair-type communications circuits used in the protected side of telecommunications networks that have an operating rms voltage to ground less than 150 volts and installed or u
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