IEC 60721-3-3:2019 环境条件分类.第3-3部分:环境参数组及其严重性的分类.在有气候保护的位置的固定使用

标准编号：IEC 60721-3-3:2019

中文名称：环境条件分类.第3-3部分:环境参数组及其严重性的分类.在有气候保护的位置的固定使用

英文名称：Classification of environmental conditions - Part 3-3: Classification of groups of environmental parameters and their severities - Stationary use at weatherprotected locations

发布日期：2019-05-22

标准范围

IEC 60721-3-3:20 19对产品安装在防风雨位置固定使用时所受到的环境参数组及其严重程度进行了分类。这第三版取消并取代了1994年出版的第二版，修正案1:19 95和修正案2:19 96。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更:a)第3条:定义与IEC 60721-3-1一致。b)条款4:符合IEC 60721-3-1。c)第5条:第A.3条已并入第5条。d)第5.2款:所有现有气候类别均已被全新类别取代。新班级分为两组。新类别的原因是IEC 60721的最新修订-2-1包含了新的气候类型。e)第5.3款:增加一个新的低气压等级。f)化学活性物质的定义值现在参考ISO 9223。g)子条款5.6:根据IEC 60721-3-1，机械活性物质的所有现有类别已被全新类别取代。h)子条款5.7:根据IEC 60721-3-1，所有现有的机械条件等级已被全新的等级所取代。i)表1:具有新严重性的新气候类别。j)表2:低气压的新等级。k)表4:新的机械活性物质类别。l)表5:新的机械条件等级。m)附件A:修订并包括清洁气候图。n)附件B:修订并包括地震环境的定义。o)附件C、D和E第A.2条中关于火灾的所有类别、所有组合类别、所有化学活性物质类别均已删除。

IEC 60721-3-3:2019 classifies groups of environmental parameters and their severities to which products are subjected when installed for stationary use at weatherprotected locations.
This third edition cancels and replaces the second edition published in 1994, Amendment 1: 1995 and Amendment 2:1996. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 3: definitions aligned with IEC 60721-3-1.
b) Clause 4: aligned with IEC 60721-3-1.
c) Clause 5: Clause A.3 has been incorporated into Clause 5.
d) Subclause 5.2: all existing climate classes have been replaced by completely new classes. The new classes are divided into two groups. The reason for the new classes is the latest revision of IEC 60721-2-1 which incorporates new climate types.
e) Subclause 5.3: addition of a new class for low air pressure.
f) Defined values of chemically active substances are now by reference to ISO 9223.
g) Subclause 5.6: all existing classes for mechanically active substances have been replaced by completely new classes, in alignment with IEC 60721-3-1.
h) Subclause 5.7: all existing classes for mechanical conditions have been replaced by completely new classes, in alignment with IEC 60721-3-1.
i) Table 1: new climatic classes with new severities.
j) Table 2: new class for low air pressure.
k) Table 4: new mechanically active substances classes.
l) Table 5: new mechanical conditions classes.
m) Annex A: revised and includes a clean climatogram.
n) Annex B: revised and includes the definition of seismic environment.
o) All classes regarding fire, all combined classes, all chemically active substances classes, Clause A.2, Annexes C, D and E have been removed.

标准预览图