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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——: p$ y( F8 N* U
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
' ^/ c& A: L, x; [( v7 R" _# ]2 G# Japplied, they shall be tested as mentioned in Section 10." b2 Y( ?6 v. f+ k
, K i4 i4 F" k- \
8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.& o( m* _( A( N
– For ordinary luminaires:,2 o- }1 Z# N+ ^- g& [* f
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and
$ Z, t' |2 I0 Z2 T• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
1 P6 t! S6 J dwhere the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:8 A8 t6 L% l' a+ d/ ` {
• for a.c.: 0,7 mA (peak);2 k5 I* [- q+ M) g% ?# _) r+ [
• for d.c.: 2,0 mA.
/ R5 {+ ^" H+ W( `If the voltages or currents exceed the values given above, at least one of the conductive/ @; y& [. k4 `1 Z& }: H: y. |
parts in the SELV circuit shall be insulated by insulation capable of withstanding a test
! f- K" X. p h( a; ]voltage of 500 V r.m.s. for 1 min.8 `2 u6 O; g, y% F9 b3 D
– For luminaires which are other than ordinary the nominal voltage (under load and under$ z* h5 j& V1 w- I( x* f- p
no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
9 ^& G4 i( K' u; a0 \4 wopened for light source replacement, the voltage limits for ordinary luminaires are
! a# Z7 W! v: ]9 c0 B0 ]' G0 ?( h: ?applicable (for parts only accessible during maintenance). |
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