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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——, ]9 d( z' c: |5 C
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is2 c3 B7 ^( M, G7 k9 ~1 ]6 w: r6 g
applied, they shall be tested as mentioned in Section 10.
U& u/ r7 Z& l, P/ K$ O* Z+ |: d
8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.
( j9 T# L0 O, @' Y. R, ?9 R– For ordinary luminaires:,! q% p" X2 q: [( z# o3 v' F
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and; m" g# r {& j2 E! X
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.( z6 f$ U* I. Z1 g
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:
3 K' V3 b y& Y9 @3 D• for a.c.: 0,7 mA (peak);
+ C' n1 c S4 g7 v! P: ?) d• for d.c.: 2,0 mA.2 e Y0 y% I2 D9 [
If the voltages or currents exceed the values given above, at least one of the conductive) B1 p5 F, u( }; r3 j
parts in the SELV circuit shall be insulated by insulation capable of withstanding a test+ Z; Q( r' j7 A9 z+ x
voltage of 500 V r.m.s. for 1 min.5 Z F0 F( _) S2 N, g8 H
– For luminaires which are other than ordinary the nominal voltage (under load and under5 z4 \) J% ?0 C# P# g+ U
no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is2 t! H, i1 g+ S, B4 S+ [
opened for light source replacement, the voltage limits for ordinary luminaires are' d L; u) ^; f y
applicable (for parts only accessible during maintenance). |
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