The earthleakageprotection device is the necessary device for coal preparation factory.
漏电保护器是选煤厂用电的必要装置。
2
This paper describes how to use an earthleakageprotection device correctly, points out that people have wrong knowledge for it.
本文叙述了如何正确使用漏电保护器,指出人们对其产生的某些错误认识。
3
Distribution parameter theory is applied to study earthleakageprotection of DC trolley network and a mathematic model of trolley network is established.