SMA WB 3600TL - Manual (Page 79)

SMA Solar Technology AG Troubleshooting
Installation Guide WB36TL_50TL-IEN102011 79
6. Verify the absence of voltage L with respect to PE at
the AC terminal with an appropriate meter.
☑ If there is a voltage present, check the
installation.
7. Verify the absence of voltage to ground at the
multifunction relay.
☑ If there is a voltage present, check the
installation.
8. Disconnect L1, L2 and L3 of the small wind turbine system from the Windy Boy Protection Box.
9. Measure the resistance between L1 of the small wind turbine system and the ground potential.
10. Measure the resistance between L2 of the small wind turbine system and the ground potential.
11. Measure the resistance between L3 of the small wind turbine system and the ground potential.
Result Action
The measured resistance is virtually infinite.
☑ There is no ground fault at the small
wind turbine system.
The his probably a ground fault in the
Windy Boy Protection Box or in the supply
cables to the inverter.
• Disconnect the Windy Boy Protection Box
from the inverter and measure resistance
of all connectors and the ground
potential.
The measured resistance is very small
(< 10 Ω ).
☑ There is no ground fault at the small
wind turbine system.
• Have the ground fault rectified by the
installer of the small wind turbine system
before reconnecting the small wind
turbine system to the Windy Boy
Protection Box.