Measuring relays and protection equipment—Part 149:Functional requirements for thermal electrical relays
IDT IEC 60255-149:2013
全国度量继电器和保护设备标准化技术委员会(SAC/TC 154)
This standard is the original Chinese electronic standard. If you need translation, please contact email: ChineseStandardsLibraryS001@gmail.com. After you successfully purchase, we will send the electronic version of this standard to your email address
