|
BARRY:6 }9 a; P6 y; A& o# r( h4 O
2 P" e/ n+ A7 }. ~5 ]
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.; _: W* _* E2 R5 G, x9 D. X) [
! H0 i8 a! ?4 U+ Y& J# U4 w9 E5 A: S2 o, O. A9 G
5.1.7 Equipment with touch current exceeding 3,5 mA
0 z% f/ E0 Q( k% K5 SFor STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT
! Y* \" _' i& N6 C$ l- _TYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements4 [" W' y# O; b% ]3 q: |; D
exceed 3,5 mA r.m.s., all of the following conditions apply:
$ G% `+ _- t. [% `. K4 b7 G2 {– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per! O5 y5 |: c' p, a' N
line under normal operating conditions. If the load is unbalanced, the largest of the three
) o7 }* e+ @* d w/ Aline currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR
# o+ S2 j# j7 H6 s$ W. B( a$ }: OCURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring3 Y/ w$ E! G/ S1 B1 r; w
instrument is replaced by an ammeter of negligible impedance; and
}8 o& R$ I v– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than5 F" u t2 V3 R, M
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of2 T& C+ O; q% i9 ?. F1 i
high PROTECTIVE CONDUCTOR CURRENT; and
" w* e. I2 y" H4 w– one of the following labels, or a label with similar wording, shall be affixed adjacent to
+ ]% r/ o, q0 p. ?the equipment AC MAINS SUPPLY connection:" L/ [9 g. {3 f8 @# Y
WARNING7 a% X4 |9 ^. Z9 u' A8 w8 ^) ^
HIGH LEAKAGE CURRENT% c8 L3 g1 N- F! C. A% H% f
EARTH CONNECTION ESSENTIAL, `. n% c, o8 o
BEFORE CONNECTING SUPPLY
6 }/ P6 T$ N/ _6 n- m6 [6 |WARNING
' Q" l: Q' K- E& ?; k! fHIGH TOUCH CURRENT
; Q: f v6 z2 c5 \! L, K6 h( NEARTH CONNECTION ESSENTIAL* \ L/ [1 U8 N. }
BEFORE CONNECTING SUPPLY |
|