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引用第27楼barryyan于2008-08-18 17:39发表的 :, O, ^. l7 d" }5 c
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。。
. g. N4 c: |% o9 v; f( ~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." _2 x1 P; m& r# o
20A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.
* `# L! Z) `0 a! }. QUL 60950, 2.6.3.3:5 K5 |) M* Q. y
, O8 A2 R- v- A* c" x9 @ l
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends% Z" U. V) B! U3 l; b5 q, I1 F3 j
on the provision and location of overcurrent protective devices. It shall be taken as the smallest
+ [1 l9 L* k& h2 V% E. t% Hof a) or b) or c), as applicable.
- L6 \7 t( C# M* Fa) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an+ x$ o- ~/ L( g1 p% D2 d# ]
overcurrent protective device provided external to the equipment (for example, in the! B7 p4 L2 A% z) U* g
building wiring, in the mains plug or in an equipment rack) to protect the equipment,2 f5 F' u3 k& |8 e5 \
with a minimum of 16 A.
8 b j$ R' F: ~$ \/ l' f [NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.) v5 \1 t- u0 U: [
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.8 i5 m# I* v% G& _4 v" `! [
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.; ^7 h/ n9 w% d6 S/ l
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007
9 h, E5 }2 r: w/ n3 qNAE
$ n5 c$ ]- j. i, A0 p5 Zb) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the' A9 a& [! b. a& V" @' u5 D5 n
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
; }+ S* [5 ~2 N& D) D3 Xspecified in the equipment installation instructions to be provided external to the6 c$ U3 |9 K5 Z0 @7 @/ _
equipment (see 1.7.2.3).6 P' G5 \/ D! \4 p
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an0 l/ B0 B4 _( p1 x9 l1 v& z
overcurrent protective device, if provided in or as part of the equipment, that protects6 }0 I# {. ^: B" p" }% h, A
the circuit or part required to be earthed. |
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