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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——; W& O/ |9 v* S7 S- ?+ D3 x+ L
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
: o, i2 F2 _. @4 f8 rapplied, they shall be tested as mentioned in Section 10.
! L6 n$ H( a* O/ C# N8 o5 A2 H
( k; n0 z3 k/ @* h5 r# t/ F8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.! E9 p2 T2 r: {7 k) T
– For ordinary luminaires:,
. n' ~4 ?! h+ Y: S. W• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and1 k0 U/ m' d* b7 n# o/ c6 Y8 W
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.
& k0 m7 k7 ]: ~* | ?where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:% Z, ^( p; i# Q- C
• for a.c.: 0,7 mA (peak);& [4 \. ?! J1 x+ r
• for d.c.: 2,0 mA.
6 v. g) U/ V7 F& K iIf the voltages or currents exceed the values given above, at least one of the conductive
* N4 u, ^, n$ gparts in the SELV circuit shall be insulated by insulation capable of withstanding a test
n- m) q0 n+ O) l3 L1 ~3 ~$ Ivoltage of 500 V r.m.s. for 1 min.( }) U6 u3 [% t/ o- O1 q9 j: F# i
– For luminaires which are other than ordinary the nominal voltage (under load and under9 d1 `& g' \0 {- d
no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is
% y. a4 M/ P, zopened for light source replacement, the voltage limits for ordinary luminaires are9 u5 v) X3 @+ y" i, \' F3 G
applicable (for parts only accessible during maintenance). |
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