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直流侧可有可无，通过short test评估就OK；
/ c6 P$ W( q. r% y. y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）：7 ^) N% u: |( j) b, N
! K( [; ^* B9 ~( [
4.4.4.5 Output short circuit
' K4 N& Y$ H) LEach power output port of the PCE, and each section of a tapped output, shall be tested one
, q; R$ R. e3 |( [at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
0 }. i. t# F+ y) l% Uprovided in the PCE or as specified in the installation instructions, shall be fitted during the: N( M7 e2 Q+ J# a/ Q4 j9 X! l6 P
test. All other outputs are loaded or not loaded, whichever load condition of normal use is less
& p; p( H6 |& k: r; e5 k( Gfavorable.: }' @; O2 f" b" w4 Q0 M) z* ?# K
Testing is required to be performed on all combinations of terminals for the port under. N: ^' ?) U0 G$ u
consideration, two at a time, including neutral and earth terminals, and one test with all
9 ]) Y) _6 I0 kcurrent-carrying terminals of the port shorted together at once. Where analysis shows that the6 w9 `+ p- T% `0 t
test for one combination is representative of other combinations, tests may be omitted.
3 V: @6 z& x4 U1 \# @' Y6 zIn addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if
- t/ { i% j3 i2 \. e, |: Y# l4 Ethey exceed the maximum rated current of the circuit, the maximum measured current shall be( |0 t0 B6 z7 Z2 \+ _- O- x- @
provided in the installation manual for the purpose of coordination of overcurrent protection of% q0 M7 P4 n1 C7 l
the external circuit conductors (see 5.3.2)./ E$ m( K+ o6 m6 \2 U" v0 P# v( @3 c
The value(s) to be recorded and to be provided with the PCE instructions are the peak
# L7 |( d8 F, Z2 ^$ G' ^/ Ncurrent, and the highest of the RMS current values measured or calculated over a time period
8 t, Y0 c- N7 B% T" U2 l- o, Yas follows:
. L* Y) ~+ l/ w' xa) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
. E) v" V" n* D+ z) a q8 hwhich case the value is to be stated as the 3-cycle RMS value;
( d) [, |7 H- c7 M+ D' jb) for all signals, the duration of the short circuit from the time the short circuit is applied, until3 H# U, W, _ z* s2 M, p
the time the short circuit current is interrupted by a protective device or other mechanism, in; l7 V7 x, u. w7 K8 B
which case the value stated is to include the RMS value and the time period in seconds;& \* t1 R% }' m. O* h' U
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
& p& c- D$ c8 F- t. I' ~/ }5 y: Q; tvalue, in which case the value is to be stated as a continuous RMS value.
# t! l$ _* g: ~2 L, X% XNOTE Where the intended use of the short-circuit current information requires a different type of measurement,
# d, S' l, @% G5 p+ K4 N1 m6 C* eadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
0 {! F, B i) }- Z1 }/ [ p* z¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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