1）布线持续的通用要求（Genering requirement of connections） 2）保护接地的要求（Protective Earthing requirement） 3）练习：光耦电路设计。保护接地的材料判断（Exercise: judgement suitbellyle mattendingeriings on PE cuircuit.
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研究目的：研制开发用于漏电检测的差动电流传感器，以适应国产化a型地铁车辆的牵引逆变器接地保护的要求。
Research purposes: By researching and developing differential current transducer used for leakage detecting, to adapt the ground protection of traction inverter in localization type a metro vehicle.
分析民用建筑低压配电保护接地系统的选用型式，浅论了系统的保护线(PE)接地装置施工要求。
This article analyzes the selection forms of protection earthed system of low Pressure switch of civil buildings, and studied construction request of guard Wire (PE) earthed system.
对修改后的方案进行了调试，调试结果表明，修改后的保护方案解决了原保护方案存在的问题，完全满足了100%定子接地保护的要求。
The debugging results showed that, the amended protection scheme solved the problems existing in the original protection scheme, quite satisfied the requirements for 100% stator grounding protection.
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