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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):, u2 ^9 }0 g# Q8 ?3 H' B! N
a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
5 @' U! _' i- c/ {. O9 R/ Dvoltage, minimum CLEARANCES are determined from Table 2K;
: c4 B5 L! j; U3 z$ qb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,# M+ S0 G* d7 w
the minimum CLEARANCE is the sum of the following two values:) b& L( P0 h+ c" `2 J
• the minimum CLEARANCE from Table 2K; and
3 w3 j$ D( {+ g/ _: f8 u2 t" ~ n, Q r• the appropriate additional CLEARANCE from Table 2L.% F) f. O$ g3 B/ u
, }) X0 u9 Z! ]! Q M+ u
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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