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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):6 p& {$ M" m3 x& Z
a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY- S8 O! U3 \& F
voltage, minimum CLEARANCES are determined from Table 2K;% v7 t7 W) ^% }2 ~( v1 Z/ @
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
/ T2 L, \+ g7 X) I& Othe minimum CLEARANCE is the sum of the following two values:
3 E+ L- z4 _7 r- z• the minimum CLEARANCE from Table 2K; and$ d4 \0 Q! K6 l! y, V
• the appropriate additional CLEARANCE from Table 2L.) {5 u. P, [6 g; b7 m# N. b) C
5 r' t: V- B( ]8 m- [) X# v
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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