The siemens scope of supply includes power equipment such as medium and high - voltage transformers as well as all the high , medium and low - voltage distribution systems 西门子供给范围包括电力设备，如中压和高压变压器以及所有高、中、低压配电系统。
This paper probes into a new method to transmit images by using the most widely existent 220v low - voltage power distribution networks as the transmission medium 本文探讨一种以最广泛存在的220v低压配电网作为传输介质，能够传输图像(视频)的新方法。
It depends on many factors . in our country , middle and low voltage distribute net system uses non - direct - grounded system including no - grounded system and anti - arc system 我国中低压配电网多采用小电流接地系统，即中性点不接地或者经消弧线圈接地。
Special request : holder of high / low - pressure switching working & operation certificate and elevator maintenance working & operation certificate , which issued by related department 特殊要求:持有有关部门颁发的高/低压配电上岗证、操作证,电梯维修上岗证,操作证
Electrical safety in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . equipment for testing , measuring or monitoring of protective measures - phase sequence 不超过交流1000v和直流1500v的低压配电系统电气安全性.防护测试测量或监测设备.相位序列
Electrical safety in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . equipment for testing , measuring or monitoring of protective measures - loop impedance 不超过交流1000v和直流1500v的低压配电系统电气安全性.防护测试测量或监测设备.回路阻抗
Electrical safety in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . equipment for testing , measuring or monitoring of protective measures - resistance to earth 不超过交流1000v和直流1500v的低压配电系统电气安全性.防护测试测量或监测设备.接地阻抗
Electrical safety in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . equipment for testing , measuring or monitoring of protective measures - insulation resistance 不超过交流1000v和直流1500v的低压配电系统电气安全性.防护测试测量或监测设备.绝缘电阻
Electrical safety in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . equipment for testing , measuring or monitoring of protective measures - general requirements 不超过1000v交流和1500v直流的低压配电系统电气安全性.防护测试测量和监测设备.第1部分:一般要求
Electrical safty in low voltage distribution systems up to 1000 v a . c . and 1500 v d . c . - equipment for testing , measuring or monitoring of protective measuring - part 1 : general requirements 交流1000v和直流1500v以下低压配电系统电气安全防护检测的试验测量或监控设备第1部分：通用要求
