标题: 防触电和防止触及运动部件中对于联锁开关的要求 [打印本页] 作者: ID长就牛b 时间: 2015-6-17 10:28 标题: 防触电和防止触及运动部件中对于联锁开关的要求 这儿有份决议，麻烦各位大哥帮我看看啥意思？ ; j/ _7 j% @( Z4 n! `& M4 i4 q- H E: D 7 W( t0 u( p9 X3 B' t0 S* dQuestion: 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.) ^) @. C2 x" M8 ^, G Which 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:* Y0 ?# l. z9 l W% P# H 1) protection against electric shock and energy hazards, or. g- V" H' [. k1 l6 i 2) protection against dangerous moving parts?) _9 x$ Y, W! k
5 j6 n6 ]0 ]8 o6 M T# Q1 Y0 JDecision: 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; ! y8 k/ }1 M# n7 g8 }2)At least a micro switch (< 3 mm) and minimum one pole disconnection to obtain the protection against mechanical hazards.1 \3 A7 M3 u: ?* u The interlock switches are tested according to sub-clause 24.1.3:8 Q0 T* N' |7 P* c! s switched under load for 10.000 cycles, switched without load for 100 cycles. K, ^7 Q h* u , z: j z$ Q. R' [8 W, F作者: 热爱学习 时间: 2015-7-2 08:56
这个跟那个用霍尔元件的好像还不一样，霍尔元件应该不算是“mechanically operated interlock switches”应该是electronically operated，情况比这个还要复杂作者: 332783568 时间: 2015-7-3 16:29
如果连锁开关要是防触电要求，全极断开，III类过电压类别，3mm电气间隙要求，连锁开关工作后不能触碰到带电部件，开关还有符合24.1.3条款的要求； ) S8 C% c+ f& [) T5 ^# x如果是防危险运动部件，小于3mm单极断开也可以 ; A2 C6 z/ e* V( F9 w# u, s1 ?