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直流侧可有可无,通过short test评估就OK;6 e' e1 m) O) N9 `9 X
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):1 Y" l9 D9 t& ?9 v
* D5 s. O3 V7 j) O/ N: n4.4.4.5 Output short circuit/ u$ k( q) m: w5 `. W
Each power output port of the PCE, and each section of a tapped output, shall be tested one' e" ?5 o j, ]4 E7 [, ~
at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
+ U- \/ e* G2 ^# J- iprovided in the PCE or as specified in the installation instructions, shall be fitted during the" u4 U7 |3 B9 f- v9 z# K
test. All other outputs are loaded or not loaded, whichever load condition of normal use is less
* ?. q/ w- E8 G6 Q& m: f. V# w6 i& tfavorable.
5 l0 V& S4 B8 Z: \) @0 HTesting is required to be performed on all combinations of terminals for the port under
, R9 A5 `6 q1 v& E2 q. o! ?; n: dconsideration, two at a time, including neutral and earth terminals, and one test with all2 c( V# T! v0 p! ^( d1 ^* J# x
current-carrying terminals of the port shorted together at once. Where analysis shows that the
: P* C9 l, q. S4 j0 [test for one combination is representative of other combinations, tests may be omitted.
4 v" v6 ]* j7 |( Y/ }% nIn addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if. p9 a, {9 T! ^- z6 {
they exceed the maximum rated current of the circuit, the maximum measured current shall be4 S8 r7 s" v; @: C4 G
provided in the installation manual for the purpose of coordination of overcurrent protection of# f- n9 [; T- D( s& D/ G+ L
the external circuit conductors (see 5.3.2).
9 ^! o5 q) `1 P& I# Z+ _& U5 VThe value(s) to be recorded and to be provided with the PCE instructions are the peak
* g# e6 q& c4 [6 Qcurrent, and the highest of the RMS current values measured or calculated over a time period
1 r0 v+ k. L# w8 F M) x" x2 W' Tas follows:0 _# e, l( A" ^( O- p; l7 z3 Z
a) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
, l3 p, u; r+ s" [6 d& c; ~which case the value is to be stated as the 3-cycle RMS value;% w6 W% i4 v- E5 I1 T2 l7 Q
b) for all signals, the duration of the short circuit from the time the short circuit is applied, until2 D- f) l/ a! {8 G
the time the short circuit current is interrupted by a protective device or other mechanism, in
C# }. d# V6 b! D* ewhich case the value stated is to include the RMS value and the time period in seconds;
. ~, d( N J. a \) nc) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
$ R9 Z; ]8 w8 i) O3 q" g6 f1 t. G- `value, in which case the value is to be stated as a continuous RMS value.
/ i" q, D+ H" L3 Z0 Q% E3 lNOTE Where the intended use of the short-circuit current information requires a different type of measurement,3 |. L7 z7 F1 L) K& X, t
additional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a. ~+ s( \6 w" |- g& [6 J
¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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