SMA SUNNY BOY 4000TL, Руководство по установке

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SMA Technologie AG Troubleshooting
Installation Guide SB40TL_50TL-IEN081211 67
12 Troubleshooting
12.1 Ground Fault Monitoring
If the Sunny Boy displays event number "35", "36" or "37", there is probably a ground fault on the
PV generator.
Check the strings for ground faults as described below:
1. Open the Sunny Boy as described in section 8.1 „Opening the Sunny Boy” (Page 49).
2. Measure the voltages between the plus and minus
pole of a string against the ground potential.
If a voltage is present, there is a ground fault in the
corresponding string.
The approximate position of the ground fault can be determined from the ratio of the
measured voltages between plus against ground potential and minus against ground
potential.
Example:
The ground fault is between the second and third module in this case.
3. Repeat point 2 for each string.
4. Close the Sunny Boy as described in section 8.2 „Closing the Sunny Boy” (Page 51).
DANGER!
Lethal danger due to live PV generator!
• Do not touch the frame of the PV generator.
• Do not connect strings with ground faults to the Sunny Boy.
• Wait until no voltage can be measured.