SMA SC 500U Installation - Manual (Page 55)

SMA Solar Technology AG
Installation Guide SC500U-IUS093411 55
9 Commissioning
This section explains, step-by-step, how to put the Sunny Central into operation, and how you can
determine that the commissioning was successful.
9.1 Visual Inspection of the Sunny Central
1. Ensure that all AC and DC voltages are not connected to the inverter.
2. Wait 8 minutes for all internal power supplies to discharge.
3. Check voltage in order to ensure that all voltages have been removed
4. Inspect all large power cables and bus connections throughout the inverter to verify that they
are tight.
5. Verify that all PV wires are connected with the proper polarity.
6. Verify that all PV wires are tightened to the proper torque specification.
7. Verify that the PV ground wires are connected to ground and are isolated from PV+ or PV–.
8. Verify that the AC neutral wire is connected to the AC Neutral terminal (only for 480 Delta:277
WYE).
9. Verify that the AC phase wires are connected correctly.
10. Verify that all AC phase wires are tightened to the proper torque specification.
11. Verify that the AC ground wire is connected correctly.
12. Inspect the interior of the Magnetics Cabinet and insure that it is free of any tools, foreign
objects, water, debris or documents.
13. Verify that the side panels of the Magnetics Cabinet are closed securely and latched.
14. Leave Control Cabinet and Interface Cabinet open for measurement purposes.
DANGER
Electric shock due to improper startup of the Sunny Central!
Death resulting from burning and electric shock.
• All procedures described in this Section shall only be conducted by qualified
personnel.
• If problems occur when performing the work described here, contact SMA America.
Application to Energy Supply Company
Before you commission the Sunny Central, inform the relevant energy provider. You must
submit the following information:
• Date of commissioning.
• Technical data of the plant.