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引用第27楼barryyan于2008-08-18 17:39发表的 :3 D- C! t8 U0 T' r( Q( K+ S
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。。
* G( y( q0 ^# L, U, o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.; m$ P1 \9 c) I4 W) ~
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.! A6 F+ E$ q& @7 B& }' x# P
UL 60950, 2.6.3.3:' L* L: }; M- G1 D3 t J8 w& }
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The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends( l: ]1 U& }: J( x4 x9 _" m% M% z9 S$ F
on the provision and location of overcurrent protective devices. It shall be taken as the smallest1 j9 P4 o( u- J
of a) or b) or c), as applicable.
6 a {8 d1 O! z$ S& Da) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
" p) f0 D8 }" F( W4 I8 U# j" |overcurrent protective device provided external to the equipment (for example, in the# c9 i: N' F3 s
building wiring, in the mains plug or in an equipment rack) to protect the equipment,
: a" G+ i, q9 u" r2 }9 Owith a minimum of 16 A.
2 [6 [3 _+ V4 ~7 }5 q& W0 dNOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
8 R6 |( H- c0 o1 w2 A+ ONOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
% A+ J$ d3 X H! w5 x# L, NNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.. M' z! m" S: q8 f$ p* v- G
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007/ ~& [. A1 o- Z2 U! U3 M# Z' F
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b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the6 S" { |6 M4 [' E* D
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device' I. c, g7 Y- P6 U7 E
specified in the equipment installation instructions to be provided external to the
$ O: A' m6 ~7 b5 W3 Sequipment (see 1.7.2.3).
% q$ T" f3 O+ l" t7 u- @* {/ Lc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an0 p& l/ O6 i! D6 X& |' h
overcurrent protective device, if provided in or as part of the equipment, that protects# v' {8 q( ~1 \5 i! @0 h
the circuit or part required to be earthed. |
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