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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
+ {& m% k* W1 f( h4 \/ oa) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
% D* g& |* x' {: V/ R1 Hvoltage, minimum CLEARANCES are determined from Table 2K;" s" b2 D4 z- c
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
$ o) H; Z1 L# A: V9 N5 I; Sthe minimum CLEARANCE is the sum of the following two values:- ]1 r, N' f5 P! h9 r" o
• the minimum CLEARANCE from Table 2K; and
7 t" |! k9 u% U' J( R4 s• the appropriate additional CLEARANCE from Table 2L.* f7 \: ^/ P0 I, z+ X% R7 h
7 k9 y/ N g2 E, q0 ^3 B7 i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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