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引用第27楼barryyan于2008-08-18 17:39发表的 :" b5 c+ R+ \- j$ M: X+ w
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。。
) Z1 p8 c: d+ t7 N* e; d; c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.; C4 i: l/ t3 I6 M1 \3 K
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.
. I# V" o/ g- E, ]" C# vUL 60950, 2.6.3.3:) S0 I; X X+ x
) w& N7 d, N6 ^ Z* ?
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
, W0 @4 V4 W7 u4 z7 ^7 non the provision and location of overcurrent protective devices. It shall be taken as the smallest
8 r, z5 ] o" \/ a' a' fof a) or b) or c), as applicable.
/ s) ^ W6 R7 h5 G. ~a) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
/ d! l- P: O+ p( L# povercurrent protective device provided external to the equipment (for example, in the
! g6 y/ A, |" ]- L$ x# `! sbuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,3 W9 b/ Z# y$ N b+ n) R: L0 @% L0 w E
with a minimum of 16 A.6 N% P9 |' s, H6 c6 _2 D
NOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.- H( i* y* w. l ]5 O
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
$ N5 d) g: O5 u) nNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.$ s6 g* a( x1 B( K0 { O. p$ {' T2 S
90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007
1 [* q. j d( m: E2 {' \NAE
/ Q& j5 j9 a% P5 F9 Pb) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the, S, S7 b/ b9 y4 D
PROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device
- O' s# f, o' z( u& pspecified in the equipment installation instructions to be provided external to the
' q2 d$ t* N$ R8 w9 `equipment (see 1.7.2.3).
- w2 _* }! [7 _: fc) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an7 z1 z5 [" h. k- z, `7 G* z7 E$ E
overcurrent protective device, if provided in or as part of the equipment, that protects; W8 e1 [; R5 g) C
the circuit or part required to be earthed. |
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