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直流侧可有可无,通过short test评估就OK;7 c9 N7 `. y! ]/ a! z) 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):
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4.4.4.5 Output short circuit
7 C# m8 y, B5 H. T8 NEach power output port of the PCE, and each section of a tapped output, shall be tested one( h0 o8 i, {6 f6 l4 @1 J
at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
" g% p3 D [( i, l9 ]1 y: _provided in the PCE or as specified in the installation instructions, shall be fitted during the
0 U4 Z+ F; Z: o: U6 J' }0 m- ^) h. wtest. All other outputs are loaded or not loaded, whichever load condition of normal use is less8 F9 D: j$ e4 d- _$ a
favorable.
; @ }4 k, t$ ^% e( u; C( R. q, oTesting is required to be performed on all combinations of terminals for the port under. j3 u6 }3 z: U9 V0 {
consideration, two at a time, including neutral and earth terminals, and one test with all
7 ~0 [. K. f4 k4 Fcurrent-carrying terminals of the port shorted together at once. Where analysis shows that the1 @6 m+ z; N! R, O" |7 m g1 ~5 T
test for one combination is representative of other combinations, tests may be omitted./ k% R+ @1 p+ A8 h5 J" Z) y
In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if, s8 b" U7 q8 @3 g! M. F7 t% e
they exceed the maximum rated current of the circuit, the maximum measured current shall be
3 e$ S+ k T; i( Y) k* @provided in the installation manual for the purpose of coordination of overcurrent protection of: m! H# A& ]7 U8 N8 F* b
the external circuit conductors (see 5.3.2).
: R! d4 S# T* l. t7 B: U! M& ZThe value(s) to be recorded and to be provided with the PCE instructions are the peak$ [# k, b. w' q, d; f
current, and the highest of the RMS current values measured or calculated over a time period' W/ @1 e3 O5 U+ X' q, b' R
as follows:
; U2 d4 j4 G$ o/ u9 {- H# A& \7 ^a) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in, |9 [# o2 V! w) S$ }
which case the value is to be stated as the 3-cycle RMS value;
: H% z( o j6 J3 Eb) for all signals, the duration of the short circuit from the time the short circuit is applied, until4 z6 v+ D% g4 P
the time the short circuit current is interrupted by a protective device or other mechanism, in6 P5 `* B" L6 o8 `
which case the value stated is to include the RMS value and the time period in seconds;2 p) U2 q) s2 s
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS F. d8 e6 |' }8 I% F8 y
value, in which case the value is to be stated as a continuous RMS value.$ c. P; z2 v3 r) E. Q# ?: g" o, L
NOTE Where the intended use of the short-circuit current information requires a different type of measurement,
) l8 T& t2 |" dadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
! Y& [1 v1 q9 v¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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