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引用第27楼barryyan于2008-08-18 17:39发表的 :
9 p: k2 m; i5 Y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。。
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.
6 Z2 p B: y+ s n/ r2 K9 g20A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.; a2 ~, p4 v: y% X! C6 z: o
UL 60950, 2.6.3.3:; u& C8 b6 a% ~4 b: @7 @' a( |5 H
W, j/ q" x1 U2 [6 L! AThe PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
. ], Y) g. A& ?7 Don the provision and location of overcurrent protective devices. It shall be taken as the smallest
j4 n- F/ [: I; c8 [' Vof a) or b) or c), as applicable.
: q1 ~% S( L: U6 E$ q, q2 da) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an/ T* l7 k, w2 @* o0 F7 T5 t
overcurrent protective device provided external to the equipment (for example, in the* G' x% y# K8 d+ t$ O1 N& Z+ S$ x
building wiring, in the mains plug or in an equipment rack) to protect the equipment,8 H' b2 {2 D- |
with a minimum of 16 A.0 c5 R0 E S8 h6 K& G' m' t3 Z
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.; t$ a3 Q ]+ D. v/ w8 f; H0 j
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
2 n a9 N. Z) f" P: uNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.! u1 z; Y* S& T/ D2 }
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007
) `$ A2 Q5 T' {1 `3 BNAE
7 W" P! z. g+ hb) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the0 G. \) e! Q) `0 A
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device( m% y! i# F- k5 n
specified in the equipment installation instructions to be provided external to the
# Y. b1 c! i ?$ K; [9 Yequipment (see 1.7.2.3).
- N' w( O }/ G/ F6 e- H0 kc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an$ U& ^; S* u9 @8 e! O- ?
overcurrent protective device, if provided in or as part of the equipment, that protects
0 ^3 o( [! ?3 Y2 u% _0 |the circuit or part required to be earthed. |
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发表于 2008-8-5 16:09
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