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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):5 i5 s5 d# g }# z6 r4 ^
a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
. z6 |" R) ^4 e& i5 yvoltage, minimum CLEARANCES are determined from Table 2K;
8 w) S/ Q) Q. Fb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
4 B3 ^; ]) t- A& u6 T& Jthe minimum CLEARANCE is the sum of the following two values:: `" t5 N! H* {* H5 k0 g, K
• the minimum CLEARANCE from Table 2K; and
0 } w; h& X3 I; C• the appropriate additional CLEARANCE from Table 2L.& P5 Y6 b% h! b8 U0 N4 Z9 x
5 {) A8 O+ F j+ A8 ?' W! c
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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