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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——! n) v6 r. Q ~5 M
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is: p- C3 b2 B& D2 h; p2 @
applied, they shall be tested as mentioned in Section 10.
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/ }+ f1 a% H7 Z$ \ f2 O8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.* R- k$ i1 I F! `9 Y* [0 j
– For ordinary luminaires:,
# R; N; N m1 W2 s• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and
$ @# l1 d9 V! ]• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.9 }" r5 Y) ^5 Q
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:* o$ j% `* r! R, L/ J: C- D6 v
• for a.c.: 0,7 mA (peak);
5 \* d. \$ s3 Y- G$ m# g0 n• for d.c.: 2,0 mA.
' J2 B* S4 \7 p# Y6 L5 GIf the voltages or currents exceed the values given above, at least one of the conductive
$ W4 L) `) G" R* A S4 q- rparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
& b" S2 \, ]( tvoltage of 500 V r.m.s. for 1 min.; ~; d. T4 E& H5 M& V8 C2 {3 M4 K
– For luminaires which are other than ordinary the nominal voltage (under load and under
, G* _3 s, `2 \ ^: v' sno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
) Y, ]1 d3 X) P# [1 C1 Ropened for light source replacement, the voltage limits for ordinary luminaires are, V( S4 W, O1 M2 w$ d1 ~
applicable (for parts only accessible during maintenance). |
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