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看2.8.7.1:
" i" i$ X r1 K5 w" x4 F2.8.7.1 Contact gaps
" `7 Q4 W* \9 x" p: z& g% k8 VIf the contact gap is located in the PRIMARY CIRCUIT, the contact gap shall not be less than that: B4 l+ ^, ?; u8 B
for a disconnect device (see 3.4.2). If the contact gap is located in a circuit other than a
+ Q, A, r5 D/ L/ e' wPRIMARY CIRCUIT, the contact gap shall be not less than the relevant minimum CLEARANCE- g; ]1 j3 ~7 c
value for BASIC INSULATION in a SECONDARY CIRCUIT specified in 2.10.3 (or Annex G).
9 I, W' k% C! n5 U4 MCompliance is checked by inspection of the available data and, if necessary, by
( b7 E2 \& [1 Q2 b0 t) g" xmeasurement.
% g3 u* a% o% }" |6 S; r- Z3 o9 |' I是否要求距离,取决于你使用的位置,如果要求,277V,换算成Peak值1.5mm也够了,不过你还需要注意爬电距离,PCB板上的两个触点间的引脚,根据内插法,至少要2.77mm以上。 |
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