|
|
引用第27楼barryyan于2008-08-18 17:39发表的 :
! y" p Q+ e# B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。。
1 W( I7 o: }& G2 r/ P6 ~. e: z. ^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.. F: v* B6 h4 u7 o- ~; T
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.7 t" t% X4 O* S
UL 60950, 2.6.3.3:" S0 x& ~ `1 l+ D) i
3 h% a6 b' m$ U
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends6 a8 o* ^; n% \. |! C& z
on the provision and location of overcurrent protective devices. It shall be taken as the smallest# {$ _8 p4 G5 v& p E- g
of a) or b) or c), as applicable.2 M6 `/ j2 W3 e
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an+ a8 m6 R4 z! }* ^
overcurrent protective device provided external to the equipment (for example, in the3 P/ n: ]$ x% t" Y; c) x
building wiring, in the mains plug or in an equipment rack) to protect the equipment,; f3 e# b2 |4 W9 I+ y v+ ?
with a minimum of 16 A.
4 I. x1 s6 c) [( KNOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.4 z( o: W: E2 p
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
$ @% t- e1 P& p _" xNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
# k$ _4 j# K/ I/ r# y. d6 s5 m90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007' X3 `: Q0 n, N" g
NAE$ v0 [' [( |: q4 b0 k; R8 Q
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the/ x+ k7 f8 N8 m8 s( u5 q6 }
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device! I# {' S) m) N% g. y8 J- U
specified in the equipment installation instructions to be provided external to the( ]; f8 z+ Z" |# }! `: y
equipment (see 1.7.2.3).
; i. Y' |9 D: Q. Y/ D4 u' T% Pc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an0 D j6 [, f) }. C' d" E
overcurrent protective device, if provided in or as part of the equipment, that protects- y! R5 @6 K1 u) D) V& q. y
the circuit or part required to be earthed. |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2008-8-5 16:09
显身卡
