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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——
% B% J4 t, K6 a& `7 z5 u" [, @* G5 _6 G5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
0 Z( e! O# y1 K8 kapplied, they shall be tested as mentioned in Section 10.+ G, u) q! M: l% b
( }# q3 j. q9 }8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.
$ g; r X9 f" D' }– For ordinary luminaires:,$ H) h$ M) {! c1 ~5 N' p$ B
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and* \3 E) P; K- ]- C+ L
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
8 H; w$ o0 W; R- P- Uwhere the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:8 ^5 g- s1 o1 V
• for a.c.: 0,7 mA (peak);9 @) A, c& Q7 _, u+ h6 `) r
• for d.c.: 2,0 mA. z( j4 v0 N* Y1 g# A: L
If the voltages or currents exceed the values given above, at least one of the conductive
" W; M O5 _$ G2 n" C) dparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
7 {: i% {2 U' X# Hvoltage of 500 V r.m.s. for 1 min.* q; U! S! _0 g/ W: c
– For luminaires which are other than ordinary the nominal voltage (under load and under
+ w# u* @9 U: r: B1 w) Z3 v4 n2 tno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
, [6 `9 M5 @0 {2 m6 Popened for light source replacement, the voltage limits for ordinary luminaires are3 x6 H8 H) Y4 F# W u" C5 r
applicable (for parts only accessible during maintenance). |
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