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看2.8.7.1:. Y: G I1 n2 K1 ^
2.8.7.1 Contact gaps/ R# j9 t2 {. E
If the contact gap is located in the PRIMARY CIRCUIT, the contact gap shall not be less than that( Y* I/ ~2 H! i# L
for a disconnect device (see 3.4.2). If the contact gap is located in a circuit other than a
, x1 C1 ^; {$ G- k) D8 W U/ Z/ iPRIMARY CIRCUIT, the contact gap shall be not less than the relevant minimum CLEARANCE+ k# m' t, w5 s3 V1 A- K0 Y" U
value for BASIC INSULATION in a SECONDARY CIRCUIT specified in 2.10.3 (or Annex G).7 y# k" Z0 W h3 P" k$ j
Compliance is checked by inspection of the available data and, if necessary, by; Y5 R# {5 T- I* t
measurement.# s0 C( u( }9 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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