IEC TR 63021:2016（E）介绍了技术特征，通过将NG电刷应用于各种绕线转子式感应电动机（大型水泵、带式输送机、升降机、提升机、煤矿或矿山中的卷扬机电机、磨机和破碎机；石油或天然气设施中钻孔的起重机、轧机、压缩机和卷扬机电机），获得了滑环NG电刷的应用结果和实用信息。

IEC TR 63021:2016(E) presents technical characteristics, application results and practical information on NG-brush for slip-ring obtained through the application of NG-brush in various kinds of wound rotor-type induction motor (large-size water pump, belt conveyer, lift, winder motor, grinding mill and crusher in coal or ore mine; crane, rolling mill, compressor and winder motor for boring in oil or gas facility).