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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——) S: }4 \6 R8 ]& W
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is9 r" w- A ?* g: q9 Q
applied, they shall be tested as mentioned in Section 10.
- ~5 s* N' d [2 U8 q$ ?, Y) j2 z) D' E1 {0 {7 c
8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.
" M! g6 ~/ P6 K0 X2 T9 p– For ordinary luminaires:,) Y9 g! g( a$ [9 }
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and9 T7 C8 Z' s) P
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.4 x3 ^9 ~7 e' g% h1 h
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:
8 a6 ^5 d- Y9 D% ?• for a.c.: 0,7 mA (peak);; h8 g# L5 N6 p; z$ k6 Y) S1 ^6 r9 b
• for d.c.: 2,0 mA.
M, q; q% Q5 }' \2 N6 r# _0 CIf the voltages or currents exceed the values given above, at least one of the conductive
7 h# q) x! ?* H6 O, ~5 Lparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
E# R0 P8 ~/ {0 G: N2 gvoltage of 500 V r.m.s. for 1 min.( c7 K! c" ]" o6 l
– For luminaires which are other than ordinary the nominal voltage (under load and under
7 p1 T2 W" A1 D$ ^% Ano load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
% A: U. A, v4 v1 Popened for light source replacement, the voltage limits for ordinary luminaires are6 ~: N, S* ?0 ~2 Q7 x. I+ d
applicable (for parts only accessible during maintenance). |
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