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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.
6 e0 i- C! i& F# | y0 k6 b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.
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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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% }8 C! x8 a: |( l9 \ E8 v用的标准是609500 A0 Q* o3 E/ R+ e- O$ K! @2 [
1.5.7.1 里面 There are no special requirements for resistors bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION,9 M2 g' S6 l& a
桥接在基本绝缘就没有要求?2 u' V2 z2 |4 X2 v6 ]5 R
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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1.5.7.18 m2 D0 Z5 K* E% ?: i
NOTE 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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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
7 j1 [' k5 F: a* B/ X: X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 turn5 O, @$ Y1 f% P/ _( v. ^
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...................................
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因为根据标准的描述,一组电阻时,短路时要满足距离要求." D/ J1 u( ~3 U; f$ p4 m
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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