动力轨道系统.第21部分:墙面和天花板安装用动力轨道系统的特殊要求

[中文适用范围]： IEC 61534 的这一部分规定了用于安装在墙壁和/或天花板上的 PT 系统的特殊要求和测试。它们可以齐平或半齐平安装@表面安装@悬挂或使用固定装置与表面间隔开。 [外文原描述]： IEC 61534-21:2014 specifies the particular requirements and tests for PT systems intended for mounting on walls and/or ceiling. They may be installed flush or semi-flush, surface mounted, suspended or spaced away from the surface using fixing devices. This second edition cancels and replaces the first edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Clauses 18 to 22 have been adapted to IEC 61534-1:2011 and include short-circuit test requirements; - Additional classification, terms and requirements for wall powertrack (PT) systems mounted at the skirting level (close to the floor) position. This publication is to be read in conjunction with IEC 61534-1:2011 .