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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——5 Q8 Z% c7 m7 t' `% L' g! E
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is3 m- { E9 ~" F& c! @7 l. h" y
applied, they shall be tested as mentioned in Section 10.9 C2 x$ ~0 ?4 A0 Z' S
) |& A8 r/ p# _8 V$ @9 k+ n) ~8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.
. _- V1 \5 v0 G: s9 A4 Z7 _( h$ c9 j– For ordinary luminaires:,% j: E7 z* d+ Y2 c+ Y
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and% m, K% X3 P4 U; u& X0 T6 J2 N
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.) O. j3 v/ Z* o, Q
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:- K% ?7 z9 s- J; ^
• for a.c.: 0,7 mA (peak);+ b5 u1 Y+ v b+ s0 m
• for d.c.: 2,0 mA.
- g3 u, @) o& v u" D X. rIf the voltages or currents exceed the values given above, at least one of the conductive% d) ~; u9 B% k+ P, @" f
parts in the SELV circuit shall be insulated by insulation capable of withstanding a test
5 H0 W( V$ m, K6 H7 Nvoltage of 500 V r.m.s. for 1 min.
0 S# c- [- x1 L# G) L, C+ p– For luminaires which are other than ordinary the nominal voltage (under load and under
3 w( ]7 p" P8 ]1 Q k Kno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is* I, z* w4 y0 U
opened for light source replacement, the voltage limits for ordinary luminaires are
3 ]! _- i9 C- l9 T& X" }applicable (for parts only accessible during maintenance). |
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