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直流侧可有可无，通过short test评估就OK；
$ T$ u! m! {6 r" x$ n6 L0 o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）：
A' \! ]; L' v1 Z) _2 [. @$ |# ~7 \0 h2 F& \5 a) E! v- X
4.4.4.5 Output short circuit
5 ~' f* w; K/ y/ FEach power output port of the PCE, and each section of a tapped output, shall be tested one
k/ }4 _4 n8 i2 I2 Y+ zat a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
7 B& t7 T# Y% H& j2 k# Oprovided in the PCE or as specified in the installation instructions, shall be fitted during the
5 H* t+ l2 `- {* Atest. All other outputs are loaded or not loaded, whichever load condition of normal use is less
' H R0 H" C, jfavorable.
! J1 J" L9 ?( u( [4 u8 H" U( MTesting is required to be performed on all combinations of terminals for the port under( V4 C3 `' O8 r B" K/ |
consideration, two at a time, including neutral and earth terminals, and one test with all
1 {: M9 E: d! N6 Ncurrent-carrying terminals of the port shorted together at once. Where analysis shows that the
A! s/ i: C0 V" Ltest for one combination is representative of other combinations, tests may be omitted.
4 ?0 \) M3 M0 J4 w6 {In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if7 W. u+ Z# M+ R0 x3 c; P. {; i r/ u
they exceed the maximum rated current of the circuit, the maximum measured current shall be
5 k# f& h: }( k; B' @1 sprovided in the installation manual for the purpose of coordination of overcurrent protection of
: b+ {" h8 t- W+ b, vthe external circuit conductors (see 5.3.2).- l' s, P% \) t8 s3 c9 F" E
The value(s) to be recorded and to be provided with the PCE instructions are the peak
o# I. M) `" d& ?; f" vcurrent, and the highest of the RMS current values measured or calculated over a time period; z4 {0 g9 `- M! W
as follows:
0 R$ s6 b: a2 u+ H% W& ca) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in0 Z6 u) e, V7 l
which case the value is to be stated as the 3-cycle RMS value;
?- B. ~* D5 @( V' E+ s% Fb) for all signals, the duration of the short circuit from the time the short circuit is applied, until
: @ p4 l+ I5 |the time the short circuit current is interrupted by a protective device or other mechanism, in5 V' o0 a" v0 {' ~ k/ h/ x
which case the value stated is to include the RMS value and the time period in seconds;& ]1 h$ @( u* {4 a6 |# O
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
( [/ S4 S5 k( X, w* E8 Pvalue, in which case the value is to be stated as a continuous RMS value.
2 D* [1 ]9 A: k% c# uNOTE Where the intended use of the short-circuit current information requires a different type of measurement,
. R7 Y; G+ _2 O) S" [8 u! B, Badditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
6 O2 }! X/ B2 a" t¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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