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引用第27楼barryyan于2008-08-18 17:39发表的 :9 D. e+ a4 o% c: i9 U1 k
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 f* r& ]) u4 I( ~1 J# m20A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.) j& e( @9 S5 B/ |
UL 60950, 2.6.3.3:6 k7 H2 }4 h# o
$ q. b6 z7 a# e. M/ e5 rThe PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
5 N. C& N% U$ ]* x6 U9 bon the provision and location of overcurrent protective devices. It shall be taken as the smallest
3 I e0 _. S! k1 a5 t4 Oof a) or b) or c), as applicable.& e! F) |2 D0 X+ a, I
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
/ r3 S, e- F* V) N6 y5 u7 Aovercurrent protective device provided external to the equipment (for example, in the! {3 \ g& d& m9 t9 y& k
building wiring, in the mains plug or in an equipment rack) to protect the equipment,
8 D% j% R ^2 K- A4 uwith a minimum of 16 A.
% P6 b, e6 d% @2 ^NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.8 n' O8 A+ B# n: b W' K! k! p0 T5 ^/ P
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.- m4 o |8 J, }/ c' g& {! L- T8 O7 k
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
- d+ f0 R2 e* H% O0 _90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007+ J) I4 I0 s, R5 N* k2 e
NAE( w+ ]) @' l( Y. P& a+ [) {
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the! N- q0 H1 d* K0 O, N/ ]2 l
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device* w1 J& l( M5 x8 T% g h1 w% p8 J
specified in the equipment installation instructions to be provided external to the
3 Z) V+ s8 ?) @8 ?6 |equipment (see 1.7.2.3).
% U/ Z/ Y2 n$ p0 f% J* @c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
2 K3 K7 l, Y& S% t3 x qovercurrent protective device, if provided in or as part of the equipment, that protects
& L w$ _8 m* k" Nthe circuit or part required to be earthed. |
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