SMA SUNNY TRIPOWER CORE1 Operating Manual page 32

6 Electrical Connection
Damage to the DC connectors due the use of contact cleaner of other cleaning
agents
Some contact cleaners or other cleaning agents may contain substances that decompose the
plastic of the DC connectors.
• Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.
Destruction of the inverter due to overvoltage
If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
the inverter can be destroyed due to overvoltage.
• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the
inverter, do not connect any strings to the inverter and check the design of the PV system.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range of 1000 V or higher.
Procedure:
1. Ensure that the circuit breaker is switched off and that it cannot be reconnected.
2. Set the DC load-break switch of the inverter to
position O.
3. Secure the DC load-break switch against
reconnection using a padlock.
4. Measure the PV array voltage. Ensure that the maximum input voltage of the inverter is
adhered to and that there is no ground fault in the PV array.
32 STP50-40-BE-en-12
NOTICE
NOTICE
NOTICE
SMA Solar Technology AG
O
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Operating manual