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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):- Z' I1 ~ q+ z% Q' g& H
a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
8 ?+ r! A, J2 ]. }voltage, minimum CLEARANCES are determined from Table 2K;
B7 O5 H! r7 ^' J+ A# b8 Zb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
% s/ T5 {( H, sthe minimum CLEARANCE is the sum of the following two values:
% B, P" z! d& m) T' R ]; V• the minimum CLEARANCE from Table 2K; and
8 s2 d! E/ p. a7 j. O7 p; u8 B• the appropriate additional CLEARANCE from Table 2L.
; }0 Q0 k' r& n6 L% x2 a, h0 u1 K, ` n
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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