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引用第27楼barryyan于2008-08-18 17:39发表的 :
3 V/ `1 r: M# G# M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。。
) D0 U" Y1 @% k' d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.( e+ J- L6 O3 a% 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.1 a6 V: C" r2 i0 v; e# o
UL 60950, 2.6.3.3:
1 x: Z" ?0 e! {
* B# C- k3 y& b% u- Q4 b XThe PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends* h1 r. l5 ]$ f. R
on the provision and location of overcurrent protective devices. It shall be taken as the smallest2 Z2 T+ K% `: g+ L" a8 {9 a5 d
of a) or b) or c), as applicable.) }" N( s% X6 Q) l J6 k! F! E
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
4 O8 I! Y4 A0 a8 S j0 F( H7 @: eovercurrent protective device provided external to the equipment (for example, in the
* b" Z5 q2 p6 r: N( v0 p/ I* Nbuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,% ^/ a( B5 n" x9 `* ^8 T
with a minimum of 16 A.
; L q; a5 K( l. u0 ~" y) aNOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
2 D% ^* d# p% ^8 sNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.: _4 B( Q+ N# f1 H5 g, Z
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
4 t" y2 u; G. k8 u90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007
- [1 Z" M! k$ @% |NAE
; H1 `- \4 e& ~1 d8 {b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the' N4 R1 V2 ]! M, [
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
3 R/ S, m' s4 ~, X3 I3 |$ |specified in the equipment installation instructions to be provided external to the' F' h2 ]. f/ B6 K) f* }
equipment (see 1.7.2.3).
' Z' l( y7 T* q$ v4 H+ Dc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
1 [) p3 Y7 n5 P" M% M, ^overcurrent protective device, if provided in or as part of the equipment, that protects
2 A# y7 ^: P. Z# gthe circuit or part required to be earthed. |
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发表于 2008-8-5 16:09
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