标题: 微动开关两触点间的爬电距离是多少？ [打印本页] 作者: 让梦飞翔 时间: 2014-11-17 16:29 标题: 微动开关两触点间的爬电距离是多少？ 微动开关两触点间的爬电距离是多少？作者: brent 时间: 2014-11-17 17:02
下文出自EN61058$ q& b( @; Q; S: E, Y' }8 _; I Y t/ s
20.1.5.2 Micro-disconnection( _! \ i( e/ P- u0 U$ I, f% j; d
Clearances between terminals and terminations shall fulfil the requirement for functional " h1 k9 _) P ?insulation according to 20.1.2. * o* [+ U! `9 U8 q8 iNo clearances are specified for the distance across the contacts. & O' J. s% R; S) o4 YClearances between other current-carrying parts which are separated by the action of the9 `5 W2 o5 R# T) S
switch shall be equal to or greater than the actual value of the distance between the relevant , F# i6 d+ ?# U0 g* v7 `. K5 gcontacts. They shall, however, be at least 0,5 mm for switches with a rated impulse withstand : g3 L0 K6 G* jvoltage of ≥1,5 kV.作者: 让梦飞翔 时间: 2014-11-17 17:10
“In a portable product using a fractional horsepower motor rated 300 volts or less, the spacing through air or over surface may9 J3 g) |# l) ]0 R
be 3/32 inch (2.4 mm) minimum; and if the motor rating does not exceed either 1/3 horsepower (250 watts output) or 150 volts, 5 Q3 a( {- {4 ^the spacings may be 1/16 inch minimum.“ 2 e6 b7 ^1 ]. l( e是不是功率小于250W的电动器具，电路板的间距也按1.6mm？