SMA SUNNY BOY 10000TL?US, Руководство по установке

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SMA America, LLC Safety
Installation Guide SB8-10TL-IUS103811 13
Fuses
No string fuses are provided with the Sunny Boy or the SMA DC Disconnect.
In accordance to 2008
National Electrical Code
®
section 690.35 string fuses are required to protect
the installation from reverse currents.
String fuses can be installed in the SMA Sunny Boy Combiner Box. Refer to the appropriate manual
for detail information.
You can get more information about the Sunny Boy Combiner Box at www.SMA-America.com.
Principle of a PV plant with a Sunny Boy
The Sunny Boy may only be operated with PV generators (modules and cabling) with protective
insulation. Do not connect any sources of energy other than PV modules to the Sunny Boy.
Position Description
A PV modules
B Sunny Boy Combiner Box
C Sunny Boy with SMA DC Disconnect
D AC load circuit breaker
E Load
F Energy meter
G Utility grid
Capacitive discharge currents
PV modules with large capacities relative to ground, such as thin-film modules with cells on
a metallic substrate, are only to be implemented if their coupling capacity does not exceed
2 µF.
During grid feeding, a discharge current flows from the cells to ground. The amount of
current depends on the manner in which the modules are installed (e.g. foil on metal roof)
and on the weather (rain, snow). This "normal" discharge current may not exceed 50 mA
due to the fact that the inverter would otherwise automatically disconnect from the grid as
a protective measure.