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BARRY:
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8 ]% S6 `5 i8 U6 f6 E, W/ m! F见下文, 还是有限制的,只是限制的方法不同,条例是我在IEC60950中找的,回头我也找UL60950看看是不是一样的., z! }( ^" z. g9 l/ t; m9 W
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5.1.7 Equipment with touch current exceeding 3,5 mA( Z( U5 W" ?$ i) p; W' ^4 n
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT
4 O. o7 }3 r: [7 o7 r' M1 V7 M; m. PTYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements$ u* t4 k' H( n# B2 v
exceed 3,5 mA r.m.s., all of the following conditions apply:
# D4 [6 n. Y& o. D– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per
) m$ X* A9 v6 q+ e6 G) w2 U: c- Xline under normal operating conditions. If the load is unbalanced, the largest of the three* ^; v9 O- `. N, S6 r; `2 l
line currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR
% t: Q3 w& Y/ NCURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring
- ?1 w3 |1 U: \' F$ Einstrument is replaced by an ammeter of negligible impedance; and* f3 \- Z; {% M- n2 A( X
– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than* _4 Y, q* D5 C, F
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of
1 C/ X3 h7 h2 S( E b. V7 {7 H6 Mhigh PROTECTIVE CONDUCTOR CURRENT; and
8 `9 w0 \. H! [: B" Q1 l– one of the following labels, or a label with similar wording, shall be affixed adjacent to6 R' _4 c7 T! C4 Q5 I4 p C* {
the equipment AC MAINS SUPPLY connection:
) U& P' S' H0 T" j8 g. ~, y' YWARNING
0 J3 _3 j7 Z; y; cHIGH LEAKAGE CURRENT& w: c E5 a, q3 T8 g8 x+ @' @* m |: |
EARTH CONNECTION ESSENTIAL
) l7 s/ j, O- I r, MBEFORE CONNECTING SUPPLY
& p3 G, X4 ?$ a5 k3 y# }- zWARNING
# O+ j) U% k& y! QHIGH TOUCH CURRENT
0 D5 @+ R3 V! \7 ~2 Y& Q& ZEARTH CONNECTION ESSENTIAL4 T9 Q7 ?3 n( V T7 p# s2 b* t; L
BEFORE CONNECTING SUPPLY |
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