有关IEC60884－1中电气间隙与爬电距离的规定

johnmark · 发表于 2009-9-24 00:45

Table 23 – Creepage distances, clearances and distances through
insulating sealing compound
Description mm
Creepage distance:
1 between live parts of different polarity
2 between live parts and
– accessible surface of parts of insulating material
– earthed metal parts including parts of earthing circuit
– metal frames supporting the base of flush-type socket-outlets
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
– external assembly screws, other than screws which are on the engagement face of plugs and
are isolated from the earthing circuit
4a
3
3
3
3
3
3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet
of the same system having accessible unearthed metal partsb, made according to the
most unfavourable constructionc
6d
4 between the accessible unearthed metal partsb of a socket-outlet and a fully engaged plug of
the same system having pins and metal parts connected to them made according to the most
unfavourable constructionc
6d
5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed
or functional earthed metal partsb
6d
Clearance:
6 between live parts of different polarity 3
7 between live parts and
– accessible surface of parts of insulating material
– earthed metal parts not mentioned under items 8 and 9 including parts of earthing circuit,
– metal frames supporting the base of flush-type socket-outlets
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
– external assembly screws, other than screws which are on the engagement face of plugs and
are isolated from the earthing circuit
8 between live parts and
– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position
– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable
position
– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs
9 between live parts and the surfaces on which the base of a socket-outlet for surface mounting is
mounted
10 between live parts and the bottom of any conductor recess, if any, in the base of a socket-outlet
for surface mounting
3
3
3
3
3
3
4,5
6
6
3
Distance through insulating sealing compound:
11 between live parts covered with at least 2 mm of sealing compound and the surface on which
the base of a socket-outlet for surface mounting is mounted
12 between live parts covered with at least 2 mm of sealing compound and the bottom of any
conductor recess, if any, in the base of a socket-outlet for surface mounting
4a
2,5
a This value is reduced to 3 mm for accessories having a rated voltage up to and including 250 V.
b With exception of screws and the like.
c The most unfavourable construction may be checked by means of a gauge which is based on the standard
sheets relevant to the system concerned.
d This value is reduced to 4,5 mm for accessories having a rated voltage up to and including 250 V.
e

其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
这句应该如何理解？
如果螺钉是在产品内部，在外部无论如何也是接触不到的，也要满足此要求吗？
比如此螺丝在内部固定产品的装饰部分，外壳的固定采用的是可以满足此要求的。

孟云房 · 发表于 2009-9-24 23:25

我觉得是要考虑的。
对固定固定式插座的底座、盖或盖板的螺钉或其它装置，
盖或盖板的固定螺钉一般在外部了，通常可触及，需考核，
对固定底座的螺钉，虽然在内部，
如果参照AS/NZS 3112注2的说法，有可能把底座固定到一未接地金属上，
而这个金属可能是可触及的，
虽然在内部，还是需要考核的；
比如此螺丝在内部固定产品的装饰部分，外壳的固定采用的是可以满足此要求的，这个应该不要求了吧。
3.14.10.1 General
Socket-outlets shall have degree of protection IP2X when installed in accordance with
manufacturer’s instructions, to the extent that this degree of protection shall cover access to
live parts and mounting screws for mounting brackets or wall boxes.

The degree of protection shall comply with the appropriate requirements of AS 60529.
NOTES:
1 Degree of protection IP2X does not preclude higher degrees of protection.
2 The extent of the degree of protection IP2X is intended to cover a situation where a socketoutlet
may be mounted to a bracket or enclosure which is not ‘earthed’.

johnmark · 发表于 2009-9-25 17:27

这个问题以前向一位同事询问过，同事建议说可以将此螺丝当作导电体的一部分，如果不有影响的话就不会有问题。
我个人觉得这种说法很对，但IEC　60884－1中有这样的规定，如果这样做万一认证公司判为不合格就麻烦了，所以不敢这样做。
在这里想知道大家是如何看待这事的。
希望大家谈谈自己的看法。

jiejie · 发表于 2010-7-3 10:09

英文东东看不懂

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