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引用第27楼barryyan于2008-08-18 17:39发表的 :8 ^& r' Y7 F: D9 b. J
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。。
$ o: y/ A" B8 h* M M. e7 s: i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.
; n8 d! O3 n( M3 \* o; e7 z+ f20A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. b9 o* `% X* {6 `9 j
UL 60950, 2.6.3.3:
4 Y P1 \) _6 f8 O. c& o q- R
& o; W4 ^5 {0 a4 k9 s( _The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends2 {. u. E. ^4 t8 Z. i6 _( s
on the provision and location of overcurrent protective devices. It shall be taken as the smallest0 ~$ v; X4 Q' P, B
of a) or b) or c), as applicable.4 M* N1 l b& v+ [
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an# n1 e1 n" ~ p* q9 }4 m" c
overcurrent protective device provided external to the equipment (for example, in the
0 T$ c0 f$ q6 L3 a5 E% j3 N5 L- ubuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,6 _7 _5 g1 l5 N* r9 V/ f
with a minimum of 16 A.( ]$ a% W5 n! s: M: l4 N
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
6 o- O4 E" O7 ^9 i% M, ^- h6 ]NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
7 Z6 a4 z; N) n$ ONOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.; ^. h& v5 [' x( D5 P
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 20078 ]8 [$ z1 ?8 e0 T8 ^
NAE9 L' b2 P4 b1 Z# F" ?6 h
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the: o" n1 |& L9 E& P, A N
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
( X$ @* G) b# O" ~- A" \specified in the equipment installation instructions to be provided external to the8 S* o, H6 t; e
equipment (see 1.7.2.3).9 A3 H0 J" w# ~0 N7 S" l9 M: |
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an* F: Z1 u6 J/ n; u" G, u% o
overcurrent protective device, if provided in or as part of the equipment, that protects
: R8 E; y; ]4 ^4 w2 z: N& y! Kthe circuit or part required to be earthed. |
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发表于 2008-8-5 16:09
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