IV351 Rev04
Date Issue 2015-04-21
Page 97 di 277 + FR
3.
Product Overview
3.1 PV System Diagram
A Grid-tied PV System is mainly composed of 5 parts:
PV panel or PV array
,
DC Junction Unit
, the
PV inverter
,
AC Junction Unit
(connection Interface) and a connection to the
Public Utility
.
The typical connection diagram of the PV system is shown in the following figure.
.
Unit
Description
PV Array
(or PV Modules)
Provide DC power to the Inverter
DC Junction Unit
This “interface” between PV array and PV inverter must consist of DC
breaker, and connecting terminals.
PV Inverter
Converts DC (Direct Current) power from PV panel(s) to AC
(Alternating Current) power. Because the PV inverter is grid-connected
it controls the current amplitude according to the PV Panel power
supply. The Inverter always tries to convert the maximum power from
your PV panel(s).
AC Junction Unit This “interface” between Utility and PV inverter must consist of AC
breaker, and connecting terminals. To comply with local safety standards
and codes, the connection system should be designed and implemented
by a qualified technician.
The Utility or the
Grid
Referred to as “grid” in this manual, is the way your electric power
company provides power to your place. Please note that the PV inverter
can only connect to low-voltage systems (namely, 230VAC/50Hz).
Note :
According to DIN VDE 0100-712:2006-06, a device for disconnecting Inverter fr
DC power must be installed between PV-module and the Inverter in German.
PV Modules Only
Do not connect any sources of energy other than PV modules to SIEL
Grid-Tied PV inverter, please beware.
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