Connecting The Pv Array (Dc) - SMA SUNNY TRIPOWER 15000TL Economic Excellence Installation Manual

Electrical Connection
6.4.4 Connecting the PV Array (DC)
DANGER!
Danger to life due to high voltages in the inverter
• Before connecting the PV array, ensure that the AC miniature circuit-breaker is
disconnected from all three phase conductors and that it cannot be reconnected.
NOTICE!
Destruction of the inverter due to overvoltage
If the voltage of the PV modules exceeds the maximum input voltage of the inverter, it could
be destroyed by the overvoltage. This will void all warranty claims.
• Do not connect any strings to the inverter which have an open-circuit voltage greater
than the maximum input voltage of the inverter.
• Check the plant design.
NOTICE!
Excessive voltages can destroy the multimeter.
• Only use multimeters with a DC input voltage range up to at least 1,000 V.
1. 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.
At an ambient temperature of over 10°C, the
open-circuit voltage of the PV modules should not
exceed 90% of the maximum input voltage of the
inverter. If this is not the case, review the plant
design and the PV module circuitry. Otherwise, the
maximum inverter input voltage may be exceeded
at low ambient temperatures.
2. Check the strings for earth faults as described in Section 11.1 "Checking the PV Array for Earth
Faults" (page 72).
38 STP15-20TLEE-IA-en-23
SMA Solar Technology AG
Installation Manual