本国际标准适用于直流系统上使用的任何电压、电容分级或气体绝缘类型的户外和室内套管，用作充油换流变压器和平滑电抗器的部件，以及空对空直流套管。本标准不适用于以下情况: -电缆终端（Potherad）； -互感器套管； -测试电源用套管； -套管外部采用气体绝缘（大气压力下的空气除外）； -工业用衬套； -牵引用衬套； -配电级变压器套管； 本标准参考IEC 60137的通用条款和条件，并定义了直流应用套管的专用术语、操作条件、额定值、试验程序以及通用机械和电气要求。

This International Standard applies to outdoor and indoor bushings of any voltage used on d.c. systems, of capacitance graded or gas insulated types for use as components of oil-filled converter transformers and smoothing reactors, as well as air to air d.c. bushings. This standard does not apply to the following: - cable terminations (potherads); - bushings for instrument transformers; - bushings for test power supplies; - bushings applied with gaseous insulation(other than air at atmospheric pressure) external to the bushing; - bushings for industrial application; - bushings for traction application; - bushings for distribution class transformers; This standard makes reference to IEC 60137 for general terms and conditions and defines the special terms used, operating conditions, ratings, test procedures as well as general mechanical and electrical requirements for bushings for d.c application.