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引用第27楼barryyan于2008-08-18 17:39发表的 :
4 m3 @7 c) Z; k+ \ m/ N9 K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。。
4 P. ]. W9 V% A. J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.9 F2 N8 q. o9 e
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 Q( r3 W2 k( G" ]4 DUL 60950, 2.6.3.3:
- Y% c- c1 E t2 N/ N. h% G0 }5 l( _% A+ y, @
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends5 t' F7 {/ y* }9 i. a! ?; f% A
on the provision and location of overcurrent protective devices. It shall be taken as the smallest; p+ @+ I+ @: G% N4 e
of a) or b) or c), as applicable.
, {1 r9 ]5 q+ R6 z; K' x4 ?+ Ia) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an5 _* J3 o+ ]2 _4 M/ y4 X3 x6 @, ]
overcurrent protective device provided external to the equipment (for example, in the4 A! ]7 R! R) ^
building wiring, in the mains plug or in an equipment rack) to protect the equipment,' {( {! Q" D$ U" [
with a minimum of 16 A.
4 }) \$ m2 W% E! {! I! T4 ~NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
4 ^' a0 ?* z/ I5 y ]$ Y! O) oNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.& J, h# } M$ @* w m# q* `
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.' R9 ] S; ~$ a4 ?$ m2 ~
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007$ i& [) k' Z% h! u. W+ u$ O
NAE
% O/ ?; ]: w/ h1 f4 j1 Ib) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the
. `* }3 Z+ E8 k, A) U5 \2 WPROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
3 E5 @- ?6 r0 W5 ^specified in the equipment installation instructions to be provided external to the
' {2 a' ^8 L% r! c3 k. n# iequipment (see 1.7.2.3).
$ }4 S% S8 @9 F9 o/ e/ Jc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
8 O. s) { C% k7 Aovercurrent protective device, if provided in or as part of the equipment, that protects
5 Y: L4 y5 m; L3 M/ Jthe circuit or part required to be earthed. |
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发表于 2008-8-5 16:09
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