Caution: Check all the wiring and connections before you connect the speed control to a drive battery. Incorrect polarity
将模型专用7.2V条状充电电池装入底板上并以R型固定插销固定电池上盖，连接电池条开关与
Photograph quantity basically introduced to detect here all sorts of unusual appearances that method of the test principle of law of plan of the 6 horn in the method, experiment and data analysis; analysed breaker to transform the likelihood in the process to appear, when explaining breaker changes thereby, detect with photograph quantity the technology examines the importance of the polarity of in-house transformer and wiring.
这里主要介绍了相量检测方法中六角图法的测试原理、试验方法及数据分析；分析了断路器改造过程中可能出现的各种异常现象，从而说明了断路器更换时用相量检测技术检验内部互感器的极性和接线的重要性。
In the first, the article analyzes kWh meter in its current polarity, voltage phase sequence, wiring quality, misusage of meters, zero line wiring method etc aspects to cause measurement error causes, and the suggests and solutions are raised.
文章首先分析了电度表在电流极性、电压相序、接线质量、错用表具、零线接法等方面引起的计量误差原因，并提出改进意见和解决方法。
Fast distinguish the wiring correctness of longitudinal differential protection by means of polarity principle
利用极性法快速判断纵差保护接线正确性