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引用第27楼barryyan于2008-08-18 17:39发表的 :
0 F3 I- J% j7 y0 B3 y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。。
7 ?0 ?2 u* |5 y8 Y+ b; U4 p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.
% R% j$ ^$ r) z+ T g* t1 Y20A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 h; ~# R1 m; G% y( V+ O1 e: ]# h3 G0 ?0 XUL 60950, 2.6.3.3:
: U! l8 w1 m; t/ N. Q: d' G* o5 i7 ]' \# P' E& o( P+ l
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
) w5 {) q; f% pon the provision and location of overcurrent protective devices. It shall be taken as the smallest4 |. M9 X8 z5 m8 F0 v P
of a) or b) or c), as applicable.7 ]6 R5 D. I( l' o& E
a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
7 w; j$ S) h; |3 x! u; d0 yovercurrent protective device provided external to the equipment (for example, in the
m' q( m) W4 D7 u! m jbuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,. T/ B+ T. c, r1 A; E, A4 B
with a minimum of 16 A.3 U, {: b+ S p
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.
3 g$ t5 t4 F9 `9 t' lNOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
8 { ]1 U' L$ S7 ~, g" VNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.% `2 u( e9 G& Z( I( U& q2 |
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 20075 j' y0 V2 p" n7 `$ m
NAE
2 f& `& X% f' j8 Fb) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the
9 w& W; a4 G. j3 d% N: t+ p- {6 x* JPROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
' X/ q+ d- g% p, R1 ^( ^8 wspecified in the equipment installation instructions to be provided external to the
2 b$ G' [; {8 wequipment (see 1.7.2.3).) [7 L9 }8 x O
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
# o* L- C7 S8 e) P' Tovercurrent protective device, if provided in or as part of the equipment, that protects( c' z8 S& t# ^3 u( {) Z" e' d
the circuit or part required to be earthed. |
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