15 Commissioning SMA Solar Technology AG
68 SCCPXT-IA-D7-en-42 Installation Manual
15 Commissioning
15.1 Sequence of Commissioning
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the Sunny Central. Touching live components results in death or
serious injury due to electric shock.
• When working in a high contact-risk environment, wear personal protective equipment.
• Do not touch any live components.
• Follow the instructions precisely.
• Observe all warning messages on the product and in the documentation.
• Observe all safety precautions of the module manufacturer.
• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage
sources before performing any work on the inverter:
– Line voltage for grid feed-in
– Internal power supply
– DC voltage from the PV array
– Additional external voltages, e.g. control signals from a control room
• Ensure that no disconnected components can be reconnected.
• Wait 15 minutes after switching off the inverter before opening it. This will ensure that the capacitors are
discharged.
• Before working on the Sunny Central, check that all devices are completely voltage-free.
• Ground and short-circuit.
• Cover or isolate any adjacent live components.
Statutory warranty or guarantee claims
Warranty or guarantee claims can only be made valid if the initial start-up was carried out by
SMA Solar Technology AG or if the fully completed and signed "Commissioning Report for Sunny Central Plants"
is available at SMA Solar Technology AG.
Connecting and disconnecting the AC voltage of the MV transformer
Only a duly authorized person trained in electrical safety is allowed to connect and disconnect the AC voltage of
the MV transformer.
Procedure See Section
1. Check the Sunny Central cabling 15.2, page 69
2. Commission the DC sub-distribution, e.g. Sunny String-Monitor DC sub-distribution
documentation
3. If applicable, commission the DC main distribution, e.g. Sunny Main Box. DC main distribution
documentation
4. Check the DC voltages 15.3.1, page 69
5. Insert fuses or disconnecting blades 15.6, page 71
6. Connect the external AC voltage of the MV transformer (to be performed by duly
authorized persons trained in electrical safety only)
MV transformer
documentation
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