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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.' C$ o5 m: A1 A7 |
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.+ ]" h' [2 ~' s; v* Y- q
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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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" M- y6 r" C }4 \用的标准是60950
# j2 _& L' D$ Z4 B7 a) f" k6 t' [1.5.7.1 里面 There are no special requirements for resistors bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION,3 K0 p Z1 }2 J5 c. y
桥接在基本绝缘就没有要求?
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: L6 p+ g- q6 w- C8 J# S" F* y/ E另外 如果是CLASS I PLUGGABLE EQUIPMENT TYPE A 并且考虑国家差异,即考虑1.5.7.13 ^3 r7 [3 m$ t/ L) p
NOTE In Finland, Norway and Sweden resistors bridging BASIC INSULATION in CLASS I PLUGGABLE EQUIPMENT TYPE A must comply with the requirements in 1.5.7.2.8 W- F% E+ K m& O
6 |4 r2 @" d ~$ |' H y8 F9 o$ }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! D/ K& D7 c, S6 d6 I' q
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
: i# }1 W( d* N: b+ p! H% C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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# R) A2 G( `8 y Y! b4 A% u, {因为根据标准的描述,一组电阻时,短路时要满足距离要求.4 J8 z5 u# |/ m: s8 \
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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