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直流侧可有可无,通过short test评估就OK;
& e& ?* ?; x9 Q% h. H3 J/ @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):8 Y( _8 ]6 A7 P% o' j. O* y
* _4 x" n9 c0 ]. Z4 R4.4.4.5 Output short circuit8 p- ]3 t, |9 ?% N
Each power output port of the PCE, and each section of a tapped output, shall be tested one
' {; d/ I+ M# J1 l1 Y$ B5 Bat a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
4 v: `5 P* p: }! q( J) Oprovided in the PCE or as specified in the installation instructions, shall be fitted during the
1 B$ E; R! U/ a9 h( C9 g$ Wtest. All other outputs are loaded or not loaded, whichever load condition of normal use is less
" M( d) C/ @, bfavorable.; d7 _! M6 ^' N# z. F- J
Testing is required to be performed on all combinations of terminals for the port under
( W) @4 e! Y1 h, ^# K( m" Qconsideration, two at a time, including neutral and earth terminals, and one test with all
, J! l" Z$ O T$ A- Q% Acurrent-carrying terminals of the port shorted together at once. Where analysis shows that the9 M$ B$ d) U$ J# {( K
test for one combination is representative of other combinations, tests may be omitted.
( X; Z- H2 L# I( Q. XIn addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if
* Z" H/ T0 `6 ?5 G" S, lthey exceed the maximum rated current of the circuit, the maximum measured current shall be; y! ~' r4 a1 E1 j
provided in the installation manual for the purpose of coordination of overcurrent protection of
7 S/ X. `4 a {$ E; w- o: k9 fthe external circuit conductors (see 5.3.2).! r! W6 @7 W a3 t' s' c
The value(s) to be recorded and to be provided with the PCE instructions are the peak
2 V3 v$ [# a. b7 q& p# Ocurrent, and the highest of the RMS current values measured or calculated over a time period& {5 r `0 E- S1 M1 \4 @3 R
as follows:
; V5 O) `0 w% J& K4 Z" Ia) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
4 A* U" n& [5 S/ ^' u m4 h: _1 Awhich case the value is to be stated as the 3-cycle RMS value;( }% o9 c, L9 K; N& R9 Y$ V; {
b) for all signals, the duration of the short circuit from the time the short circuit is applied, until+ o+ e& k: j6 Q
the time the short circuit current is interrupted by a protective device or other mechanism, in
, C" p5 i% S: y; S! i S5 [& Z) ewhich case the value stated is to include the RMS value and the time period in seconds;6 H5 Y' j- X% p1 c. |
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS5 v$ a" ^- H1 ^/ K- V* v
value, in which case the value is to be stated as a continuous RMS value.
# K; o5 P6 E1 Y" u. G E& KNOTE Where the intended use of the short-circuit current information requires a different type of measurement,( H6 h7 Q: ?8 ?0 o
additional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
, @, R. F+ R( B: o6 U4 V; X¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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