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直流侧可有可无,通过short test评估就OK;
2 }: }: j8 n5 `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):) [* i# [# n7 {0 P6 H" P4 L' u
% M1 R5 f) y1 T4.4.4.5 Output short circuit* V3 Q; A9 I* C7 b9 w+ d, c
Each power output port of the PCE, and each section of a tapped output, shall be tested one
0 C1 N- z5 b$ w: \( X7 B7 Y; Fat a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
6 L4 b# o3 O4 rprovided in the PCE or as specified in the installation instructions, shall be fitted during the- j# x3 n1 j/ e
test. All other outputs are loaded or not loaded, whichever load condition of normal use is less
8 y t% X/ [9 V" M2 ^; H- afavorable.
6 j: H, A, k! g" O# `/ \. a$ Z KTesting is required to be performed on all combinations of terminals for the port under
4 D1 R5 M9 p# j' u4 \consideration, two at a time, including neutral and earth terminals, and one test with all
' j- n- V0 d3 X* D( ^current-carrying terminals of the port shorted together at once. Where analysis shows that the( R% f" n1 v5 t; W
test for one combination is representative of other combinations, tests may be omitted.6 Q2 ?+ E5 j& h1 [. Z, v1 p
In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if! G2 B) W; D" Y
they exceed the maximum rated current of the circuit, the maximum measured current shall be) v8 a0 b$ U4 z# Y* E1 d$ D
provided in the installation manual for the purpose of coordination of overcurrent protection of
1 p. o$ G/ D! Y! }the external circuit conductors (see 5.3.2).9 q% d4 t- Q, J2 S! X" D$ D) u2 T! O
The value(s) to be recorded and to be provided with the PCE instructions are the peak
" b5 R+ |0 l( k% L; ?% V4 k7 ?current, and the highest of the RMS current values measured or calculated over a time period) F) o0 Z& E1 f, V0 i) u) d
as follows:2 l. ^3 F; z' A$ p. A+ E
a) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
5 [) ?0 d1 y* f2 S1 zwhich case the value is to be stated as the 3-cycle RMS value;
6 y0 ^( {3 E" S: n1 t0 ^' D5 wb) for all signals, the duration of the short circuit from the time the short circuit is applied, until/ n5 W, e+ Q* O" S! S
the time the short circuit current is interrupted by a protective device or other mechanism, in" o4 W$ v6 `9 Q" v4 u5 R
which case the value stated is to include the RMS value and the time period in seconds;8 @8 ^, X: E! @! A
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
% E( X: M9 T; [: L. Z% Mvalue, in which case the value is to be stated as a continuous RMS value.
$ o- U7 [9 e0 A, r$ A9 i$ ONOTE Where the intended use of the short-circuit current information requires a different type of measurement,
0 F+ i; H& x+ \ C* U: Fadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
, ^6 \3 N1 } h¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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