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直流侧可有可无,通过short test评估就OK;3 \7 R9 l4 x1 n
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):
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4.4.4.5 Output short circuit
( m+ X9 R. G( q0 B8 }' VEach power output port of the PCE, and each section of a tapped output, shall be tested one/ c- w7 h3 V" W/ q4 v4 A
at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as- ~7 Q' G* }! P( l8 G7 B0 w9 p
provided in the PCE or as specified in the installation instructions, shall be fitted during the
1 y/ p' W/ ~" Atest. All other outputs are loaded or not loaded, whichever load condition of normal use is less
+ l# C8 v; @& p: U3 \/ a* zfavorable.
7 X0 h/ ?2 [% r! WTesting is required to be performed on all combinations of terminals for the port under R6 ?( z) ?: u3 [
consideration, two at a time, including neutral and earth terminals, and one test with all2 f M" t9 _) m0 f; v( J; k. t! y
current-carrying terminals of the port shorted together at once. Where analysis shows that the
) I [3 K5 d7 `5 G3 w1 Z5 L/ Ltest for one combination is representative of other combinations, tests may be omitted.
$ S7 M8 i* q) n% v8 FIn addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if
# ?+ C0 {: N0 M* d! C( Athey exceed the maximum rated current of the circuit, the maximum measured current shall be
" D. ?8 {. Z) m; ^2 G( Y$ R1 F) Z: B: zprovided in the installation manual for the purpose of coordination of overcurrent protection of5 }" V4 g% ~" N6 s" d$ C3 I$ g
the external circuit conductors (see 5.3.2).. j- u8 d$ k0 R3 B6 a
The value(s) to be recorded and to be provided with the PCE instructions are the peak8 D7 m. j9 v4 l8 c0 j* c) R
current, and the highest of the RMS current values measured or calculated over a time period) n; l4 N/ t$ j8 x; d
as follows:9 l/ F/ r' a8 r+ H U
a) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in6 d; v. I [% d% r; p% N
which case the value is to be stated as the 3-cycle RMS value;
v3 k1 U7 Z, R5 m" s2 }b) for all signals, the duration of the short circuit from the time the short circuit is applied, until! h5 y0 ~$ t5 M7 Q) z- k
the time the short circuit current is interrupted by a protective device or other mechanism, in
4 n& X) k0 J/ d, twhich case the value stated is to include the RMS value and the time period in seconds;! e) ~! O" ~3 R' @$ E7 {* ~/ D! m, \
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS: O& m- z5 ]8 E6 {5 b
value, in which case the value is to be stated as a continuous RMS value.
& a e& C% x2 p2 R1 G g i8 _NOTE Where the intended use of the short-circuit current information requires a different type of measurement,0 H# F; a6 z$ Y) R1 ?
additional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
- F8 L5 T; q7 C; U! q) U* F5 X# c¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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