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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——9 R$ U) L" k8 f1 D" L( B7 k
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
% K4 f$ M3 e" L! L. O4 Eapplied, they shall be tested as mentioned in Section 10.; x6 N! i, s) ~; G% ^+ L
6 d* D4 \4 u# r7 H2 T
8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.' T0 H! H9 Q1 s4 o5 M: [7 c2 \! B
– For ordinary luminaires:,8 q( G: y, @8 n" F/ v6 `6 z; c
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and0 X S7 y9 g- H" Z* i. [
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
; y# v* b* l0 k" L& t2 w! [where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:
0 V" {* a3 U# k0 A$ Q• for a.c.: 0,7 mA (peak);
5 w$ w% U3 M6 O- D- v4 O# s• for d.c.: 2,0 mA.
* p) a9 k) ? `( C) BIf the voltages or currents exceed the values given above, at least one of the conductive
; c c! W7 o; n6 Y: k( oparts in the SELV circuit shall be insulated by insulation capable of withstanding a test8 `/ {* E- B+ c' o! R0 j T# K) Z
voltage of 500 V r.m.s. for 1 min.6 x$ u- f U, l" u8 K
– For luminaires which are other than ordinary the nominal voltage (under load and under# h0 `5 M2 `$ N3 ~
no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
: q+ m& Y. n' R% @( yopened for light source replacement, the voltage limits for ordinary luminaires are6 j( q9 p7 M' }: ?* v: V, P7 X' G5 }
applicable (for parts only accessible during maintenance). |
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