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之前发了个关于泄放电阻的帖子,不过那个帖子只是考虑泄放电阻有认证的情况.9 R% p5 _: i) b4 ^( I) j
但是因为有认证的泄放电阻价格比没有认证的高很多,所以很多时候都是使用的无认证的电阻.& |7 P+ ^; Q4 x; L' w
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另外请不要说什么把泄放电阻放在保险丝后就可以了的话,因为这个谁都知道.
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用的标准是60950& ^' c" Y4 E0 i" O* C
1.5.7.1 里面 There are no special requirements for resistors bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION,
5 ], F( k7 ?# U1 V桥接在基本绝缘就没有要求?3 y: q. [. Y% Q, u+ Q
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另外 如果是CLASS I PLUGGABLE EQUIPMENT TYPE A 并且考虑国家差异,即考虑1.5.7.1
: A1 B/ N6 o1 P/ n5 WNOTE In Finland, Norway and Sweden resistors bridging BASIC INSULATION in CLASS I PLUGGABLE EQUIPMENT TYPE A must comply with the requirements in 1.5.7.2.
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c# V: }" z# M& J. T+ Y9 X在有俩个泄放电阻的情况下,是必须要一个泄放电阻短路时,距离还要符合要求0 v# C: P j0 N; f" T
即:1.5.7.2的 If a group of resistors is used, the CLEARANCE and CREEPAGE DISTANCE are assessed as if each resistor were short-circuited in turn
5 g0 G, T/ {# h5 \. A, g* p还是只要短路情况下能通过耐压测试,并且满足LCC就可以了.If an accessible conductive part or circuit is separated...................................; ]4 ^# {0 @: B7 A+ W
$ r& w/ C" r8 [' C" X: \ ?6 h' h因为根据标准的描述,一组电阻时,短路时要满足距离要求.
6 w0 G* ~* L% E$ t但是我又想到,既然桥接加强绝缘都可以只要满足耐压和LCC,那么桥接基本绝缘是否也只要满足耐压和LCC就可以了呢? |
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