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BARRY:2 n. O5 p! x5 e$ F E2 a
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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.* a* _# b1 r1 X0 ~ L( y
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5.1.7 Equipment with touch current exceeding 3,5 mA) @! x" M- z; j! a: h5 H D
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT8 [. m/ q" m' j1 ~/ K
TYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements9 [% ?2 G3 A' z0 Z* S# ~
exceed 3,5 mA r.m.s., all of the following conditions apply:
4 Z$ e8 R) v! A9 A1 H# z& Q– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per" e+ o4 d* j6 ]% `3 l6 s& q
line under normal operating conditions. If the load is unbalanced, the largest of the three$ S& [+ u! Q, Q9 s( r
line currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR: ?5 Z! ?# X" G Y5 @* T) u
CURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring1 W$ n% c3 F/ X( H
instrument is replaced by an ammeter of negligible impedance; and w; K* Q/ I( V* I
– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than4 J9 g7 y6 C* e* {" H! V$ Q
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of k8 ^, a, P2 K6 U, [3 W$ }
high PROTECTIVE CONDUCTOR CURRENT; and
8 B# B n6 M) {- ^– one of the following labels, or a label with similar wording, shall be affixed adjacent to5 `2 T7 t7 r3 @% M1 H. d
the equipment AC MAINS SUPPLY connection:
- o" K3 a( ~' m1 M" UWARNING$ T w' T& ]: l/ P% H8 L* v
HIGH LEAKAGE CURRENT8 h( p. {2 Y/ t! ~* G( }
EARTH CONNECTION ESSENTIAL
* A! I" c6 }( Q0 A, vBEFORE CONNECTING SUPPLY
+ O& ~2 y) N* FWARNING, n" J! X1 G3 @- P; S( L$ i4 K
HIGH TOUCH CURRENT1 S2 y$ {$ x1 a; i, E
EARTH CONNECTION ESSENTIAL
* `1 Q7 Y7 K% O g3 a. |, _BEFORE CONNECTING SUPPLY |
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