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引用第27楼barryyan于2008-08-18 17:39发表的 :0 X! A9 I' J) B: t( h8 E
请问：WTDP所使用的断路器必须是20A的吗？在进行120/240V 20A的测试时，由于是20A的断路器，感觉很容易就跳开了，导致审核无法进行。。
. i l7 [, X: z( b它要求的是20A带载, 主要是模仿美洲的电路系统. 见标准写的一段话.
8 u$ P8 F, D, [. w& }3 C20A短路是很容易跳开的,所以你一定要明白,这个Breaker是用来做什么的.- m& j, p. \- P! |9 K
UL 60950, 2.6.3.3:
' p1 n) s& H+ C C0 d
|, y6 b+ X- q( n2 H% ~The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
. B5 [2 w9 r5 a# [on the provision and location of overcurrent protective devices. It shall be taken as the smallest. ~9 o1 _1 ^+ |" D+ {5 v- t$ N( t
of a) or b) or c), as applicable.
- X0 M, p: p) Q7 }a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an9 }5 o4 [4 Z' L6 t1 ]* ^& _
overcurrent protective device provided external to the equipment (for example, in the* J j+ L2 H7 L+ B4 u/ k3 `8 X6 Z7 l# B
building wiring, in the mains plug or in an equipment rack) to protect the equipment,( X+ i1 C9 c( y2 D1 ~
with a minimum of 16 A.4 Z' B. u( P7 o% U) V
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
" V* {( O" x9 S3 xNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
0 i" n' P$ [' wNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.# M& Q6 z: ]! a% |4 U- G
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007
3 ?2 M' W$ @. I( `NAE
7 z* x# A+ E1 ~! b/ T5 a: qb) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the
" I l X O: s$ w8 _' z4 m2 MPROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
" f2 u! |: h. S- v6 yspecified in the equipment installation instructions to be provided external to the
9 q2 L. D# M8 M& l; G. [equipment (see 1.7.2.3).4 e' \6 S* n# O. \: `4 N& E9 c
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
" o8 d/ k+ q `) \2 Dovercurrent protective device, if provided in or as part of the equipment, that protects
$ S! j' k1 e$ v6 S+ T6 O* J) p$ Gthe circuit or part required to be earthed. |
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