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这儿有份决议，麻烦各位大哥帮我看看啥意思？- Z; }. ?8 c- W% b
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Question: For removing or opening a cover, a door, etc., mechanically operated interlock switches can be used for protection against electric shock and accessibility of moving parts.
% M2 L0 l' I! L! gWhich are the requirements for interlock switches regarding distances contact gaps and reliability of cycling operations of switches for fixed appliances and appliances provided with plug which provide:! v* I% P/ Y6 N- V- R- M4 Y( Y6 M$ Y
1) protection against electric shock and energy hazards, or; w' G& y4 b4 |+ `
2) protection against dangerous moving parts?2 u+ S! Q4 s5 }5 x5 N0 n* j
9 y$ C, ~4 R5 G' t* Y. f yDecision: 1) It is not acceptable to get access to live parts after operation of an interlock switch without a tool even if is at least 3mm between the contact gaps and with all poles disconnection. In that situation it is still considered to be live. Only certain parts 2 (e.g. air cleaners and insect killers) this is allowed;
/ t( Z9 X$ J3 P! J8 W2)At least a micro switch (< 3 mm) and minimum one pole disconnection to obtain the protection against mechanical hazards.
2 w8 x. K# R6 x* {5 {: P: LThe interlock switches are tested according to sub-clause 24.1.3: n* ^# u) T' @" m1 T8 r) F0 _
switched under load for 10.000 cycles, switched without load for 100 cycles.3 n1 A" }4 c% D) ^
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发表于 2015-6-17 10:28
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