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引用第27楼barryyan于2008-08-18 17:39发表的 :) V# [7 V9 Y; o& g! l7 _3 L' ?
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。。 6 d' H8 Q* n4 H# Z6 @# 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. L. ~: B' _( E t1 f5 `
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.
/ ?5 o& l5 C" r1 G$ i7 T- KUL 60950, 2.6.3.3:5 J W X) Y* k3 n( z
/ i! K" i' ~7 {The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
# o% e& Q. s4 [4 }, ?on the provision and location of overcurrent protective devices. It shall be taken as the smallest) {* {, M7 J& T$ M* _2 T
of a) or b) or c), as applicable.
7 \' j3 `# V# z/ Ra) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
* ~8 v6 O( A; t* d9 l9 {2 wovercurrent protective device provided external to the equipment (for example, in the
: g' o7 F5 o8 L9 w: Lbuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,
3 |. f7 Z, A* l# b2 Swith a minimum of 16 A.8 |& j2 v+ Q2 t+ n
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
$ v& h; B+ F- ]4 p* ~0 ZNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
1 r1 e' h0 ]9 K3 q. DNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
( G) [, x1 j6 z5 ]/ w, \* ^90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007! z" E1 ?2 {' v! P( ]
NAE
8 k1 F: f' l: N9 d# f4 Ob) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the: {4 c$ w/ T# @, B5 w. n. I% A
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
" H* [) W+ w# c. f' W! D/ r, bspecified in the equipment installation instructions to be provided external to the( s5 P% l. \; g5 \8 b6 b
equipment (see 1.7.2.3).
$ S& C* g- h+ }2 t1 y) j8 qc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
& [' o9 V: y5 s# P: v+ N, Y6 b- Aovercurrent protective device, if provided in or as part of the equipment, that protects& E. ~' B) n" E% y5 J* s
the circuit or part required to be earthed. |
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