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直流侧可有可无,通过short test评估就OK;2 y. {: W/ h" L+ r+ q* 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):
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4.4.4.5 Output short circuit
. O8 n4 [! m# F" zEach power output port of the PCE, and each section of a tapped output, shall be tested one
& O' L! w( K( s/ yat a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as$ n5 H9 r y+ g) l& B% O9 u
provided in the PCE or as specified in the installation instructions, shall be fitted during the
- ^4 E/ u+ p, K+ Ttest. All other outputs are loaded or not loaded, whichever load condition of normal use is less* x+ I8 {; v! d! L( v
favorable.
+ H( ~) L- T0 i+ ITesting is required to be performed on all combinations of terminals for the port under
5 k. t4 q. S; m" ^* B% ^& @consideration, two at a time, including neutral and earth terminals, and one test with all H/ s6 A4 u% }* P4 G; H& ^, g
current-carrying terminals of the port shorted together at once. Where analysis shows that the9 J$ C. @8 b0 j7 G! X" A8 I* k
test for one combination is representative of other combinations, tests may be omitted.7 Z- I- E& z8 E' T
In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if* N4 |: J. O5 K2 z7 }* B/ z
they exceed the maximum rated current of the circuit, the maximum measured current shall be
( H( n7 W, |6 G; R @- oprovided in the installation manual for the purpose of coordination of overcurrent protection of
& b/ D* u4 k/ J z0 c# ^the external circuit conductors (see 5.3.2).5 I" g& ] S2 I5 L7 V4 A) w
The value(s) to be recorded and to be provided with the PCE instructions are the peak
- H A, o. D0 k' Ccurrent, and the highest of the RMS current values measured or calculated over a time period* P1 T* s6 m: a" J
as follows:
( N2 M# E0 Z' q2 i; I" `7 | Ka) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
! P! A0 {! z. X3 U6 ^+ Vwhich case the value is to be stated as the 3-cycle RMS value;, u# I8 c! d0 }4 i; g2 T
b) for all signals, the duration of the short circuit from the time the short circuit is applied, until, V1 a" x/ |6 O; p
the time the short circuit current is interrupted by a protective device or other mechanism, in! P1 f$ h4 W5 ~
which case the value stated is to include the RMS value and the time period in seconds;
, ~3 K- D6 A7 x: K# `c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS2 e/ M, w2 c( v/ Y
value, in which case the value is to be stated as a continuous RMS value. D- O4 S( @( J; I
NOTE Where the intended use of the short-circuit current information requires a different type of measurement,
8 v' ]) e8 {3 W# Jadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
( w% _. `2 _' c( |¼-cycle RMS or other RMS calculation to the 3-cycle RMS above. |
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