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看2.8.7.1:3 C/ d* L y# y; l: k, T
2.8.7.1 Contact gaps- A( }1 m+ t: M1 P+ f
If the contact gap is located in the PRIMARY CIRCUIT, the contact gap shall not be less than that' q2 s" n% X8 D/ N' \ G6 b: y2 L" b4 W
for a disconnect device (see 3.4.2). If the contact gap is located in a circuit other than a
0 Y. ]5 x( }/ W9 {PRIMARY CIRCUIT, the contact gap shall be not less than the relevant minimum CLEARANCE) I% z6 C& Y# x0 {5 W! v# |0 y
value for BASIC INSULATION in a SECONDARY CIRCUIT specified in 2.10.3 (or Annex G).' m1 M9 Y0 |8 H/ d* ~2 [# Q' V# [* a1 O
Compliance is checked by inspection of the available data and, if necessary, by
9 f) J# ^1 p. o- t1 l& O' {$ r2 Kmeasurement.3 R8 T; O2 [" D) c$ z
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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