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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——
$ x: ], N F9 y3 R: I5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
& {7 E3 d9 r9 V/ c3 Iapplied, they shall be tested as mentioned in Section 10.* L1 r1 V' W" H7 u( x" P6 }4 O
" ]7 B/ w) b4 }% w8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.
/ t) [; h1 x7 l– For ordinary luminaires:,' X) g" Y2 Y: p$ K7 g7 A3 n X2 B
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and
3 F C& q; O8 Y0 [( V4 ]! d• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.2 J( s1 \* b/ b' K; C
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:0 d7 C+ [- ~# e4 h4 `
• for a.c.: 0,7 mA (peak);
! f+ a2 ? L5 Z' i: Y• for d.c.: 2,0 mA.. e7 e% V4 K2 d) n! L* x
If the voltages or currents exceed the values given above, at least one of the conductive
8 ~, x# O6 r1 Y* R9 rparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
' T" O# V# p9 O0 r8 z* mvoltage of 500 V r.m.s. for 1 min.1 Y b1 A7 @, S( G, a7 Y
– For luminaires which are other than ordinary the nominal voltage (under load and under
' p+ r4 |8 y3 E+ E" _no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is6 [/ M1 s$ g: \! k( l) E5 T; S+ u- b
opened for light source replacement, the voltage limits for ordinary luminaires are; T' u9 |1 N" V, \, x
applicable (for parts only accessible during maintenance). |
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