SMA SC 500U Installation - Manual (Page 17)

SMA Solar Technology AG
Installation Guide SC500U-IUS093411 17
3 The Sunny Central
In this section you will see how one can identify the Sunny Central. A short description of the Sunny
Central's design and functions are given here.
3.1 System Overview
The Sunny Central is an inverter for indoor and outdoor. The enclosure is made of steel which has
been zinc plated and coated and which conforms to the NEMA 3R protection rating. NEMA 3R
means that the Sunny Central is protected against dust and water and chemical aggressiv
environment when it is closed.
Operating Principles
The PV modules convert a portion of sunlight into electrical energy (direct current). The Sunny Central
then converts the direct current into alternating current and feeds it into the public grid. This current
can be used directly, or it can be sold to your energy provider.
3.2 The Sunny Central's Design
The Sunny Central is divided into three sections.
Position Description
A Magnetics Cabinet: The Sunny Central's transformer is contained in the
Magnetics Cabinet.
B Control Cabinet: The control cabinet contains the system control, the Sunny
Display, the stop/start switch and the power units for
converting direct current to alternating current.
C Interface Cabinet: All AC, DC and data cables are connected in the interface
cabinet (see also Section 8.2 "Connection Area"
(page 45)).
A B C