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引用第27楼barryyan于2008-08-18 17:39发表的 :
+ X, j3 ]: T5 c# u; }9 ?' x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.
! n1 M/ l& p& H0 C' o3 Q5 f+ @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.
: S' ?4 [+ u6 Q! H6 C6 b) rUL 60950, 2.6.3.3:
5 B1 F* e8 N& P- v- I& j! w2 [9 `& i3 x2 Z$ b4 |: D Y5 T/ d9 j
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
5 f2 i& S4 X' k! H+ G6 [on the provision and location of overcurrent protective devices. It shall be taken as the smallest( u& M! \: q- M: O
of a) or b) or c), as applicable." r% O. z: |3 ~0 s
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an7 D+ u- R; w- M* t9 X+ T0 K
overcurrent protective device provided external to the equipment (for example, in the7 b+ V! R$ o3 _6 P0 ~* g+ g
building wiring, in the mains plug or in an equipment rack) to protect the equipment,
3 L+ T" f; X5 k& [: Kwith a minimum of 16 A., G b+ G2 c) K6 p
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.- X7 ~& A: N4 ?
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A. a0 p) }* h9 D5 d! Z: K7 m
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
* {3 c/ J6 s' i; A, e90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007 k, b! [" Q) U, X. i2 i
NAE2 b5 d2 N# u7 v: M0 S. C
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the
/ Z/ H1 {6 R5 ]! yPROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
# H8 j% g/ f/ \! ]4 I& wspecified in the equipment installation instructions to be provided external to the( F+ \$ a1 a& n! b* u9 {! D6 Z% y
equipment (see 1.7.2.3)., c2 R0 m9 [! _( m
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an" |& t& b. X, `+ N8 p
overcurrent protective device, if provided in or as part of the equipment, that protects7 _; I |+ v' I& _1 d5 l
the circuit or part required to be earthed. |
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