IEC/TR 62271-301:2009技术报告适用于高压开关设备和控制设备，如断路器、隔离开关和开关。但是，它也适用于其他设备。无法给出尺寸和额定正常电流之间的协调。第二版取消并取代2004年出版的第一版，构成技术修订版。与前一版本相比，主要的变化是增加了第2条，术语和定义，以及图2至图7。

IEC/TR 62271-301:2009 technical report applies to high-voltage switchgear and controlgear such as circuit-breakers, disconnectors and switches. However, its application to other equipment is not excluded. No coordination between dimensions and the rated normal current can be given. This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision. The main changes with respect to the previous edition are the addition of Clause 2, Terms and definitions, as well as Figures 2 through 7.