|
|
直流侧可有可无，通过short test评估就OK；
4 \ s/ [3 C, u交流侧就看你设计了，要样机里没有，需在说明书中说明装机时交流侧用的外置Fuse的Rating，相关要求如下（IEC 62109-1）：# W' S: K9 l: @- H- J9 _" F
/ n0 q: m# v. N# n( C
4.4.4.5 Output short circuit) ?4 @% B1 z5 X( B' J! s$ J1 a
Each power output port of the PCE, and each section of a tapped output, shall be tested one
2 K; ]2 s4 F3 z9 U! m3 m0 J: aat a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as v, S+ k5 \& x9 ?) \0 C- F
provided in the PCE or as specified in the installation instructions, shall be fitted during the' P& M) I6 H$ {# @" F
test. All other outputs are loaded or not loaded, whichever load condition of normal use is less1 X4 T8 \! O" ^% ~* l
favorable.
. | W) H4 a1 STesting is required to be performed on all combinations of terminals for the port under
4 n7 X; {8 @. ]4 A; k2 Y7 r; `2 j, hconsideration, two at a time, including neutral and earth terminals, and one test with all. K4 M8 I, \+ Z7 ^& E# G$ A
current-carrying terminals of the port shorted together at once. Where analysis shows that the5 \/ I% b) Q3 ~. }- `6 s, t
test for one combination is representative of other combinations, tests may be omitted.) `4 A. o# D4 d( J8 B
In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if, ]. c$ t, ]; E4 V7 z3 y2 @8 T
they exceed the maximum rated current of the circuit, the maximum measured current shall be
8 v2 E3 N& }' C1 i6 N2 Wprovided in the installation manual for the purpose of coordination of overcurrent protection of
" @/ F6 O4 ], x1 tthe external circuit conductors (see 5.3.2).
7 a( L' y q. W/ EThe value(s) to be recorded and to be provided with the PCE instructions are the peak K; y% W7 j8 I& \0 ^7 y. a
current, and the highest of the RMS current values measured or calculated over a time period
5 n5 W5 _. g8 Kas follows:
% F5 M& M9 D0 H% W1 O% R6 Ca) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in; J) P, @5 O$ W
which case the value is to be stated as the 3-cycle RMS value;. q+ p3 n' A" K! @" {8 e5 E
b) for all signals, the duration of the short circuit from the time the short circuit is applied, until
& w% ^: @. C. Y" a/ Q, H l v A! ethe time the short circuit current is interrupted by a protective device or other mechanism, in x8 e. l1 E2 l) @1 S& z
which case the value stated is to include the RMS value and the time period in seconds;9 O1 u' m2 c7 f. K! Q4 H
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
- O4 {4 x: p M8 S% H+ U7 qvalue, in which case the value is to be stated as a continuous RMS value.
. G& [8 K# w) F6 \0 s6 u( ^NOTE Where the intended use of the short-circuit current information requires a different type of measurement,
/ [ b; v3 l% aadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
* P# K( s9 F- Q# A4 K1 i) W. v¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-7-31 20:32
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2012-8-2 00:14
