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明天我 发表于 2017-3-3 10:06 
) G2 v+ w& W3 K( @我现在的困惑就是人可以接触的电路是不是只要是安全电压下的不管电流多大是不是都是可以接触的,大电压下 ...
. M8 k% R M& w: \ 首先,再次更正你所说的电压应为“安全特低电压SELV”,即该电压不管在正常工作状态下或是单一故障条件下都不能超过交流峰值42.4Vpeak或直流值60Vdc.) h. O( A: d( d9 p7 J: J; ]# l
其次,补充这两类可直接接触的前提还需要满足Clause 2.1.1.5 and 2.1.1.8中对能量危险防护的附加要求。- O* h8 R3 D9 d, h
这样才是完整的解释。
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IEC 60950-1 Clause 2.1.1
( ?4 Y. Y2 f5 E8 J) ~' j2.1.1 Protection in operator access areas
4 A( r8 A7 |# m3 U- vThis subclause specifies requirements for protection against electric shock from energized parts based on the principle that the OPERATOR is permitted to have access to:5 o, t9 O# _# q9 M w- \
− bare parts of SELV CIRCUITS; and) e1 x- v, [: o' T& e! P+ q5 k
− bare parts of LIMITED CURRENT CIRCUITS; and6 |" |/ x: t) E% v8 `
− TNV CIRCUITS under the conditions specified in 2.1.1.1.
0 f. y: j/ ?6 q; AAccess to other energized parts, and to their insulation, is restricted as specified in 2.1.1.1." P! v2 Q+ d" \+ d+ ?
Additional requirements are specified in 2.1.1.5 and 2.1.1.8 for protection against energy hazards. |
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