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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——% L+ W2 p) v! S* P/ `
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
1 d: o" r# X' ~, c h$ z, y+ rapplied, they shall be tested as mentioned in Section 10.
4 _" }5 i5 W R$ E" q
% M" I6 \4 ~% O" F2 ?8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.3 u* J3 Z# Q: m- Y) y
– For ordinary luminaires:,2 Y+ s3 M! A A% l) w
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and) q8 Y' g/ C+ t) i5 ^# U# G- T6 Y
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
# W {( O' Q" ^! P9 `& Awhere the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:9 a, U9 F0 l4 n1 J9 A7 _) J
• for a.c.: 0,7 mA (peak);
0 G1 U7 g7 J2 Z: }' @" r# C7 Z0 m• for d.c.: 2,0 mA.2 S, h4 a, |8 k$ H2 m; }1 n. b
If the voltages or currents exceed the values given above, at least one of the conductive
b7 E1 B1 A* ?* B: X* J3 Lparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
9 C( @' ^8 n8 R% |& u' wvoltage of 500 V r.m.s. for 1 min.
2 w' \9 w# R2 ?0 j" @# `– For luminaires which are other than ordinary the nominal voltage (under load and under
( `* N0 \* q; Kno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is. w' J6 z, @3 P2 U( N
opened for light source replacement, the voltage limits for ordinary luminaires are
2 A$ A. u% u- a3 N! _6 Lapplicable (for parts only accessible during maintenance). |
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