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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
$ G4 W) G' U. Y. s( R4 x" Ya) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
' o, `8 |9 i: c( n/ }& wvoltage, minimum CLEARANCES are determined from Table 2K;
. h% y& X# I, L' e nb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
5 |' \6 B) Y9 q4 I1 F* r% } _the minimum CLEARANCE is the sum of the following two values:& P3 w+ {: J; m' |# @
• the minimum CLEARANCE from Table 2K; and
. |8 i3 g# L+ T• the appropriate additional CLEARANCE from Table 2L.
$ n0 Q5 R& R3 } Y; u$ c1 O
) p- `1 Y, b( j \( H; a! K3 X9 \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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