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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
; z* B. H- l0 l+ t5 }a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY8 p3 d& j: \1 V' `( K. `3 ?7 J
voltage, minimum CLEARANCES are determined from Table 2K;
+ ^" m G( r& U, m( L% e! q" eb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
( ]) R3 a! r$ [the minimum CLEARANCE is the sum of the following two values:- U) }; _, P. p- k0 z% d; v
• the minimum CLEARANCE from Table 2K; and3 N/ _/ Q# |& G' k( N
• the appropriate additional CLEARANCE from Table 2L.+ V8 R7 H9 }0 U/ l! f& [% N
9 j r- ~; v5 S* U5 u/ 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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