本帖最后由 passagere 于 2016-5-20 20:58 编辑
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$ e, F8 F5 ^) t/ N) S5 Y大家好!$ k+ }& B& Q( f
9 H/ ?2 e, U& V4 U" _美规1598标准中对电击危险定义与8750的定义略有区别,8750里的电压限值为30 V rms or 42.4 V AC,60 V DC。0 a" c N1 z5 J0 t" [- d
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7 b D# M: o: t+ q3 o# r: f1598对电击危险的定义:; _' x0 o/ \3 a; T* f4 c- K
% X* [$ r! m4 c5 I4 PRisk of electric shock – in Canada and the United States, a risk of electric shock exists between any two uninsulated conductive parts of a luminaire or between an uninsulated conductive luminaire part and earth ground if the continuous current flow through a 1500 Ω resistor in parallel with a 0.15μF capacitor connected between the two points exceeds 5 mA rms (7 mA peak) and if the open circuit voltage exceeds 30 V rms or 42.4 V peak for dry, damp, and wet locations. . J2 D* N" y0 {4 M2 U
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在上面条款中,电压限值为30 V rms or 42.4 V。那直流输出的限值是否被认为是42.4V?而UL 1993标准中的此定义和UL 1598标准中的定义很相像,相关的差异为“than 30 Vrms, 42.4 Vpeak (and DC) ”。 # v' K, s! @& u- [6 \
# m6 ^" K" h) @- J$ H& d请问,在使用有class 2输出认证的电源时,如果直流电压超过42.4 V,那么用于1598适用的灯具时,电源输出端子是否被视为危险带电部件? / C' M( R; B% T
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谢谢!
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