SMA SB 1100LV - Manual (Page 30)

Installation SMA Technologie AG
Page 30 SB1100LV-11:SE2006 Installation Guide
Design instructions
The following must be tested/ensured in particular:
1.
Do all strings have the same number of modules connected in series?
2. How high is the maximum reverse current in a defective string at nominal
conditions?
Example: Generator with 4 strings of modules at 5 A short-circuit current.
The maximum reverse current is 3 x 5 A = 15 A.
3. Are the modules suited for this reverse current?
4. Are the plug connectors of the modules and the inverters suited for this reverse
current?
5. Is the string wiring suited for this reverse current?
6.4 Commissioning
You can start up the Sunny Boy SB 1100LV when
•
the lid is securely screwed shut,
• the AC (mains) cable is connected correctly,
• the DC cables (PV strings) are fully connected.
How to start up the inverter
1. First of all, switch the line circuit breaker and the
DC circuit breaker to the "on" position.
2. Look at the LED display and consult the table on
the following page to check whether the Sunny
Boy SB 1100LV is in a fault-free and expedient
operating mode. Once the inverter is in a fault-
free operating status, start-up has successfully
completed.
Attention!
If the bottom yellow LED flashes four times at intervals of one second, the
grid voltage and the PV generator must be disconnected from the Sunny
Boy SB 1100LV immediately! There is a risk of damage to the inverter
resulting from excessive DC input voltage.
On