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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
5 _9 u0 `- X; d1 G, V; ?a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
0 {+ R, \5 }" d0 Evoltage, minimum CLEARANCES are determined from Table 2K;1 S- {* A# N/ u# E1 V' w
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,' p' v; {3 o8 k$ ?3 i6 r" c
the minimum CLEARANCE is the sum of the following two values:. e$ x0 n9 e7 K- L J! M* N. s5 p- n
• the minimum CLEARANCE from Table 2K; and# f+ P# S% F4 @
• the appropriate additional CLEARANCE from Table 2L.
- L; l& a4 F G% a3 P% v; X) S+ v8 I( B! ?# W7 Y1 _
标准中的b)第一点中“the minimum CLEARANCE”是相对于什么的最小间隙呢?? |
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