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引用第27楼barryyan于2008-08-18 17:39发表的 :# G- `: L. o' l, Q3 _ j
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.
. D7 t6 q% e* M( b7 J) P20A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.
' c4 `* |2 }" x6 d1 W2 t& cUL 60950, 2.6.3.3:
; N j/ k/ I* s. v) T# V7 w
, k8 H" E6 ^, k/ c* oThe PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends R1 Z- O9 ^$ q: w. }
on the provision and location of overcurrent protective devices. It shall be taken as the smallest; d" h$ n" n4 ?. w! v! s% k$ j
of a) or b) or c), as applicable.
/ \1 L/ e4 d! D* O/ Sa) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
1 A% I2 J* f* vovercurrent protective device provided external to the equipment (for example, in the
# m, x; a! {% w+ \building wiring, in the mains plug or in an equipment rack) to protect the equipment,8 ^2 q) W; T2 Z8 a1 h1 f
with a minimum of 16 A.
- W* I3 I8 S6 `$ y6 oNOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
. G( W% ~/ R: o. D, c. z6 y uNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A. j; _- E/ o+ q. A" D+ e5 w6 {
NOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.; _, A$ F- o6 I2 V7 `$ l
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 20073 t/ T ~( w- @1 W3 U1 \
NAE7 _, z: a7 ]5 [7 }5 O1 c
b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the3 V0 {$ W* ]9 m6 x
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
# z s, G. Q) cspecified in the equipment installation instructions to be provided external to the
5 r! L. y/ Q$ e9 D: w/ _; r4 dequipment (see 1.7.2.3).' M1 C( `; z$ S6 S* s
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
5 F% M7 C0 I. b$ r& E) G U2 M7 Wovercurrent protective device, if provided in or as part of the equipment, that protects
0 D* w0 R1 R% c( g: Qthe circuit or part required to be earthed. |
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