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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——
7 n6 ]; Y2 O# S/ Y5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
3 F9 y( Z+ U4 V7 ^1 Z7 S5 Vapplied, they shall be tested as mentioned in Section 10.
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5 z# t3 t: G+ Y% @$ Z! e7 J& I8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.7 X' j5 U( l, A K* F3 I3 d1 W* _
– For ordinary luminaires:," f8 e$ p" G0 ?' h$ H7 N c
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and
0 J" B* r# k0 J% S• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
- B! L e# g& T8 a1 C' {- U4 H: gwhere the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:% H& G" ~- z6 u, U) M; Y! U
• for a.c.: 0,7 mA (peak);1 i8 L" o$ \: z& W- y7 f
• for d.c.: 2,0 mA.; W, c, u" I1 F4 T, X* \4 N& o
If the voltages or currents exceed the values given above, at least one of the conductive
1 n. U) S) [" r2 tparts in the SELV circuit shall be insulated by insulation capable of withstanding a test) B" \/ ^5 X, ?& B8 R# G
voltage of 500 V r.m.s. for 1 min.9 ~1 C1 r3 a! h$ l. ~
– For luminaires which are other than ordinary the nominal voltage (under load and under
7 Z3 _6 B' |$ j* A( qno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is( ^. \6 q; l" G+ Y
opened for light source replacement, the voltage limits for ordinary luminaires are+ @! M) B/ v1 b, b9 K( r" V
applicable (for parts only accessible during maintenance). |
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