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BARRY:
1 \5 Z6 c+ U; U+ d& ^, s$ f
/ q( ^ |8 [9 A& 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.
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5.1.7 Equipment with touch current exceeding 3,5 mA2 u; U$ h% n( q6 S3 ]
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT o( U: a! K( @6 L4 Y( w9 v+ r
TYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements
/ P8 d4 a" K1 A! _4 h J+ \) r. Sexceed 3,5 mA r.m.s., all of the following conditions apply:0 {1 j J7 Z7 D; A6 C) t( e; H
– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per
0 Z& F* C& r) j* oline under normal operating conditions. If the load is unbalanced, the largest of the three
3 T8 `1 Z& Q3 w4 u, V2 Fline currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR7 m1 Z9 D M. g* {' I
CURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring+ ^" B4 q. D! Y( {( f6 C n
instrument is replaced by an ammeter of negligible impedance; and) V* z1 K( t( e# f$ m N( \
– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than" [2 A: W8 {7 s' x( h
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of
7 i1 Z; m7 ^1 v! J6 Shigh PROTECTIVE CONDUCTOR CURRENT; and/ _! K1 E" ~3 z7 U2 ]- ~- @' J
– one of the following labels, or a label with similar wording, shall be affixed adjacent to* T4 Q0 b1 x+ g( d& ?6 V* u
the equipment AC MAINS SUPPLY connection:
6 A# T% L& X- J, o' [) c3 m, s- N* BWARNING, E D7 R/ m4 h: F" c' c
HIGH LEAKAGE CURRENT1 o. p+ H+ L4 @8 Q6 [
EARTH CONNECTION ESSENTIAL& H0 |4 o; h' c; A' u/ A, q4 `$ Y
BEFORE CONNECTING SUPPLY
0 x8 a/ s8 Y4 YWARNING* f3 u- O* }4 Y% A! T* w$ K, e
HIGH TOUCH CURRENT# t7 M! ?. c8 h6 K
EARTH CONNECTION ESSENTIAL
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