|
|
引用第27楼barryyan于2008-08-18 17:39发表的 :5 ^+ g! c: [- A' u7 }; Z' 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。。
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.' d# P6 h' B7 z
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.
2 B8 B1 F5 S* s: t" ^0 [' jUL 60950, 2.6.3.3:% {9 o& t$ f+ N* L* u
N/ |8 [/ [& }1 E/ s" r
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends5 N1 u2 S0 j& \" _
on the provision and location of overcurrent protective devices. It shall be taken as the smallest
. ~' U7 F2 }$ Xof a) or b) or c), as applicable.
W! s: Z1 i; ]: |' ra) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
1 Y4 s" D) ?/ I f" m$ |: Kovercurrent protective device provided external to the equipment (for example, in the4 v: s; F% N$ V5 I; z; j! ~$ |
building wiring, in the mains plug or in an equipment rack) to protect the equipment,1 |$ A7 ^: ~, j
with a minimum of 16 A.
& `6 x$ k& f% ]' J. P* O: ONOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit./ M5 H# e: }, u( ]
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.0 d! M% k; O4 d$ Q& Y/ i
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A./ |8 S1 ?/ m C0 v) l
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007 y2 E: b9 F; M9 M$ v1 g
NAE! j8 u' \# ?- C" e- a1 v6 p
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the. Q8 E) M9 q( Z3 ?! q' W
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device1 M0 D4 n$ t3 m0 [1 c! h
specified in the equipment installation instructions to be provided external to the
/ |8 C. ]4 h" X% Gequipment (see 1.7.2.3).
. I" T$ c, q8 ?% Gc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
8 D6 P# A8 d! o' eovercurrent protective device, if provided in or as part of the equipment, that protects
" g( Q7 \) D2 ~+ _: r5 qthe circuit or part required to be earthed. |
|
/1 
|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