|
直流侧可有可无,通过short test评估就OK;+ h- `6 W" i* y9 r$ v5 w
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):% j: {4 L4 Q3 V; l. \
+ k' S0 O0 c+ X. x# q
4.4.4.5 Output short circuit
) ^7 B0 U( q) |# o6 ^+ dEach power output port of the PCE, and each section of a tapped output, shall be tested one4 M$ h3 g) z0 [% }: {
at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as ?$ O e, n8 V# |- n I
provided in the PCE or as specified in the installation instructions, shall be fitted during the9 ?7 s0 ]5 D' G
test. All other outputs are loaded or not loaded, whichever load condition of normal use is less
% |1 X- q; R7 k* ?/ Cfavorable.
; U( ]; {' _' X( nTesting is required to be performed on all combinations of terminals for the port under
" U' L6 c! F& `8 Z- ^consideration, two at a time, including neutral and earth terminals, and one test with all
/ ^/ f4 w& e6 y* A9 J3 f7 F! W, Ocurrent-carrying terminals of the port shorted together at once. Where analysis shows that the
$ j# _: `0 s9 C: Q, w" E/ Z. Ctest for one combination is representative of other combinations, tests may be omitted.
2 k6 g O+ D7 E- W( S# zIn addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if
8 B" e6 [1 ~ S% Ithey exceed the maximum rated current of the circuit, the maximum measured current shall be o ]& E; M. I( R1 ^; D8 c0 c( I
provided in the installation manual for the purpose of coordination of overcurrent protection of
: o1 K9 y ?2 T5 Mthe external circuit conductors (see 5.3.2).& s" s, \2 x; f
The value(s) to be recorded and to be provided with the PCE instructions are the peak! D) ~! m' J' p. p
current, and the highest of the RMS current values measured or calculated over a time period- J7 w& i# d8 W; u
as follows:
( Q D# c" e# {. l+ I, L! _3 ?3 N: Qa) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in1 O9 G% V% B: W: e9 Y5 z8 R
which case the value is to be stated as the 3-cycle RMS value;0 O: Z: G" r! O- ^% E3 l+ T
b) for all signals, the duration of the short circuit from the time the short circuit is applied, until& t' n+ W; [ t- B/ Z
the time the short circuit current is interrupted by a protective device or other mechanism, in
3 s/ d- \5 a3 {( I) T) r% Gwhich case the value stated is to include the RMS value and the time period in seconds;
. j% Q9 S; i; n5 H/ O) n1 rc) for short circuit tests that result in a continuous non-zero value, the steady-state RMS# b5 ]$ ^% L2 H& S
value, in which case the value is to be stated as a continuous RMS value.
" q( T& ~0 g: N+ qNOTE Where the intended use of the short-circuit current information requires a different type of measurement,
6 \% Z* B/ R; H8 Z5 qadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a3 F2 v! }1 n: y9 M
¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
|