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BARRY:
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- ^* X0 t8 n5 ?3 {4 \! q$ u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.
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5.1.7 Equipment with touch current exceeding 3,5 mA9 j5 \2 X' }/ B9 n5 z
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT0 p; {$ z( h: v; j
TYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements" s/ K5 A4 T! o% F5 R
exceed 3,5 mA r.m.s., all of the following conditions apply:
1 d" C- ^# H* [0 }+ y7 C– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per, E4 {6 L) t: X5 {# K0 V7 d
line under normal operating conditions. If the load is unbalanced, the largest of the three
6 X$ d8 ~. i7 c; J) Xline currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR% w# [: A6 g- U9 v9 [
CURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring' S1 H$ n% t5 A3 c
instrument is replaced by an ammeter of negligible impedance; and
0 l+ d, z6 `- T. x% ~6 z– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than
) W; {3 i3 x0 p5 @that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of& n. n) Q) m0 x, U
high PROTECTIVE CONDUCTOR CURRENT; and
t$ ^! W" u$ L– one of the following labels, or a label with similar wording, shall be affixed adjacent to- o, t- n( \2 R3 R6 x
the equipment AC MAINS SUPPLY connection:
9 b( X4 k6 p: A: G3 \WARNING
& D* A2 j8 _& D) f% nHIGH LEAKAGE CURRENT' h- o8 b2 T) y5 `; M
EARTH CONNECTION ESSENTIAL! U6 S1 d6 ?0 s- r3 v: i+ r0 n9 J1 b$ [
BEFORE CONNECTING SUPPLY0 Q1 z0 A, L7 J; j6 N1 R1 I( X' ~
WARNING6 g3 K% _7 L" U* S9 G& |
HIGH TOUCH CURRENT, g* E, w3 ?0 ^
EARTH CONNECTION ESSENTIAL$ J# ?. p6 q: J$ v. }1 s
BEFORE CONNECTING SUPPLY |
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