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BARRY:
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) G6 |( l8 g8 g8 B4 z! u7 q: E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./ L& ]' V: i E3 @- P
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* s* y3 z9 {* A5.1.7 Equipment with touch current exceeding 3,5 mA1 J6 S! I/ i: q9 T: w4 n
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT
% N- y' A) @6 [" Z9 ?! MTYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements
" g4 t& _8 B9 d A2 \exceed 3,5 mA r.m.s., all of the following conditions apply:
# c# k" C, |: J$ ?5 A( d+ L– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per
. ~" L2 t5 w7 D* R5 `line under normal operating conditions. If the load is unbalanced, the largest of the three5 E ~6 \8 E+ D' j
line currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR
. U/ C- c/ C/ r7 A# Q9 s5 E, NCURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring
9 r& ]: E' [+ ~: o$ N3 c% p. yinstrument is replaced by an ammeter of negligible impedance; and& }! T4 ]& i# q. a% v8 x
– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than4 `+ v+ \: U; U9 l
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of
: o$ s4 K3 ?! u; s4 V7 lhigh PROTECTIVE CONDUCTOR CURRENT; and0 S- {4 j3 o4 \& l5 |* W, H0 p
– one of the following labels, or a label with similar wording, shall be affixed adjacent to
5 G- {+ ^& Y" ?1 kthe equipment AC MAINS SUPPLY connection:, _9 L I& c/ O2 F, ~
WARNING
7 |' w( i2 e! w+ z- e: K) ^HIGH LEAKAGE CURRENT. d1 f- \" s$ U9 M: b
EARTH CONNECTION ESSENTIAL; T F, J) ^) h! k; j
BEFORE CONNECTING SUPPLY4 R% X3 n9 O' i$ U$ q) x" {
WARNING
2 q6 Q+ i: D, v7 M3 f% k2 t* hHIGH TOUCH CURRENT
7 ^9 m0 a% e; G, g0 i) jEARTH CONNECTION ESSENTIAL, H* e) p& M2 c! _) ]* L. z
BEFORE CONNECTING SUPPLY |
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