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引用第27楼barryyan于2008-08-18 17:39发表的 :7 v; Y/ Y% t2 [
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。。 9 ?5 Q# ]1 z5 g# G
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.8 {/ i0 I- N# |% o- q
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.
& S! v1 q+ w7 q8 \& RUL 60950, 2.6.3.3:. L. U) V% F! e) E9 ^; @
! X. }4 @' e$ Z% c0 }% O& E- W1 {
The PROTECTIVE CURRENT RATING of the circuit (used in Table 2D and in the test of 2.6.3.4) depends
+ b$ R2 s$ ?& ~5 c8 N; zon the provision and location of overcurrent protective devices. It shall be taken as the smallest/ h; j. X ~+ s9 X s. }
of a) or b) or c), as applicable.
! E) u6 o6 T5 s1 p$ }8 Ta) For PLUGGABLE EQUIPMENT TYPE A, the PROTECTIVE CURRENT RATING is the rating of an
, z: ?& o1 L5 S+ @9 ?* Y8 kovercurrent protective device provided external to the equipment (for example, in the
9 d0 R1 ~, a: @1 Qbuilding wiring, in the mains plug or in an equipment rack) to protect the equipment,
9 d* n- z3 ^+ W; T" f! Kwith a minimum of 16 A.
/ Z I8 M6 k( D( wNOTE 1 In most countries, 16 A is considered to be suitable as the PROTECTIVE CURRENT RATING of the circuit.2 K" j% z/ [; a% P/ ~$ f8 d
NOTE 2 In Canada and United States, the PROTECTIVE CURRENT RATING of the circuit is taken as 20 A.
! J+ E$ l) v; Q7 T/ \ a0 R* o; UNOTE 3 In the United Kingdom, the current rating of the circuit shall be taken as 13 A, not 16 A.
! p( y @$ k! ]+ I1 A2 R! B: R90 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 20074 K& r- |( z! k. A0 ~
NAE
: F" w# `( [& F1 @b) For PLUGGABLE EQUIPMENT TYPE B and PERMANENTLY CONNECTED EQUIPMENT (see 2.7.1), the
8 C1 l% D( i7 c4 D1 FPROTECTIVE CURRENT RATING is the maximum rating of the overcurrent protective device) ^( G5 w- q1 Y; ?% Y3 ~' y
specified in the equipment installation instructions to be provided external to the+ h7 o7 P" b5 v' a- ?) @( L
equipment (see 1.7.2.3).7 M: m6 o2 [6 A) L, n* |' u {
c) For any of the above equipment, the PROTECTIVE CURRENT RATING is the rating of an
; e$ M7 z# C3 R$ l2 T$ F1 L. }* kovercurrent protective device, if provided in or as part of the equipment, that protects
" ?& t7 j' z" K X- @/ p$ pthe circuit or part required to be earthed. |
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