逆变器中交流、直流侧的保险丝，必须要安装吗？

yeanling

广东安规检测
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看到其他厂家的一些逆变器产品中都没有交流、直流侧保险丝。或者是只有交流侧有保险丝。那样的设计安规上是否可以？保险丝到底是否需要安装？怎么安装才符合要求呢？

kevin245

沒錯 -->不管是交流侧或者直流侧都可以不用保险絲      
. \- ^( s( ~) f我們以前有裝, 現在都拿掉了.

houfengp83

不管是交流侧或者直流侧都可以不用保险丝，交流并网侧可用继电器保护异常动作，直流侧如果连接到限流源就不存在过流

戏尘

和设计有关 然后看你做异常时FUSE 的能否保护

清水白菜

直流侧可有可无，通过short test评估就OK；
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）：

4.4.4.5 Output short circuit
9 |8 x3 y( K4 V* K' M; z& BEach power output port of the PCE, and each section of a tapped output, shall be tested one
% ^1 e% s7 \4 Y5 E% E0 g9 ^at a time, to simulate short circuits in the load or wiring. Overcurrent protection devices as
provided in the PCE or as specified in the installation instructions, shall be fitted during the
5 o% \9 ]* ]1 M6 [test. All other outputs are loaded or not loaded, whichever load condition of normal use is less
favorable.
! _8 H( Q( i$ z) X1 iTesting is required to be performed on all combinations of terminals for the port under
; K8 y- p3 ?( A' F" _" bconsideration, two at a time, including neutral and earth terminals, and one test with all
7 `9 s6 d! z5 U* }) d: ]current-carrying terminals of the port shorted together at once. Where analysis shows that the
' g5 H2 t* [0 W/ c" m- B0 \( Ptest for one combination is representative of other combinations, tests may be omitted.
In addition to the requirements of 4.4.3, the short-circuit currents are to be recorded and if
they exceed the maximum rated current of the circuit, the maximum measured current shall be
, L" l. Z0 ^1 Q& hprovided in the installation manual for the purpose of coordination of overcurrent protection of
& D& e2 F8 T9 U+ O3 e, _8 A5 Vthe external circuit conductors (see 5.3.2).
: k: F( j7 B+ M6 ~% IThe value(s) to be recorded and to be provided with the PCE instructions are the peak
" r% u2 V8 K1 J5 t) P# Qcurrent, and the highest of the RMS current values measured or calculated over a time period
as follows:
a) for AC signals, 3 cycles of the nominal AC frequency for the port under consideration, in
which case the value is to be stated as the 3-cycle RMS value;
( `# W3 E1 Z9 G1 v, Nb) for all signals, the duration of the short circuit from the time the short circuit is applied, until
the time the short circuit current is interrupted by a protective device or other mechanism, in
' m& L5 Z' F' c" a+ S/ Jwhich case the value stated is to include the RMS value and the time period in seconds;
c) for short circuit tests that result in a continuous non-zero value, the steady-state RMS
; ?- R: j: Q6 b/ i, g0 x* hvalue, in which case the value is to be stated as a continuous RMS value.
NOTE Where the intended use of the short-circuit current information requires a different type of measurement,
* w" A$ G7 f1 j* o/ u& g# Nadditional data may be provided. For example, for AC mains fault current contribution some utilities may prefer a
# [1 v4 b  ?; V4 @+ X/ b¼-cycle RMS or other RMS calculation to the 3-cycle RMS above.

11狼

大部分厂家都是在交流侧安保险丝，但是也有在直流侧安装的，这要看你的设计了