SMA SB 3300-11 Installation - Manual (Page 34)

Electrical Connection SMA Solar Technology AG
34 SB33-38-11-IA-en-62 Installation Manual
5.5.4 Connecting the PV Array (DC)
1. Disconnect the miniature circuit-breaker and secure against re-connection.
2. If an Electronic Solar Switch is installed, pull it
downwards, slightly towards the wall.
3. Check the connection cables of the PV modules for
correct polarity and make sure that the maximum
input voltage of the inverter is not exceeded.
With an ambient temperature over 10°C, the open-
circuit voltage of the PV modules should not exceed
90% of the maximum input voltage of the inverter.
Otherwise, check the plant design and the
PV module connection. If this is not done, the
maximum inverter input voltage can be exceeded
at low ambient temperatures.
DANGER!
Danger to life due to high voltage at the inverter
• Before connecting the PV array, switch off the miniature circuit-breaker and make
sure that it cannot be reconnected.
NOTICE!
Excessive voltages can destroy the measuring device.
• Only use measuring devices with a DC input voltage range up to at least 1 000 V.
NOTICE!
Exceeding the maximum input voltage can destroy the inverter.
If the voltage of the PV modules exceeds the maximum input voltage of the inverter, it can
be destroyed by the overvoltage. This will void all warranty claims.
• Do not connect strings with an open-circuit voltage greater than the maximum input
voltage of the inverter.
• Check the plant design.