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结合下 5.3.1.5 和 8.2.3 条款进行考虑 ——% I; K" p5 y3 _' b
5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is
7 p' J7 Y& n, u! Papplied, they shall be tested as mentioned in Section 10.
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; j4 P b% v' A; `' i& j8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions.2 ]8 i. b J! }7 ^
– For ordinary luminaires:,7 U& R6 u* N3 c/ E9 g# [: _
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and$ {- t3 H" \# W- p6 F: D2 G
• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c." [) U% Y3 x7 U' D( l3 F7 Z
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed:5 h: t, [7 m! p6 P# {. B0 {
• for a.c.: 0,7 mA (peak);! z8 \3 f) ~8 X' w/ s& j
• for d.c.: 2,0 mA.
7 n0 F# Y) v3 o% OIf the voltages or currents exceed the values given above, at least one of the conductive+ k) t2 N( P' Z4 W
parts in the SELV circuit shall be insulated by insulation capable of withstanding a test
i) _$ i" B) Y0 @% w1 vvoltage of 500 V r.m.s. for 1 min.+ x* a2 a. s$ v1 ^- L# ` i
– For luminaires which are other than ordinary the nominal voltage (under load and under
# e2 f; H% V! a9 ^" Jno load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is2 O& @( N1 N; V* o
opened for light source replacement, the voltage limits for ordinary luminaires are- a) [: Y! W: u% r t" T1 h' O
applicable (for parts only accessible during maintenance). |
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