SMA TCS 500SC-JP - Manual (Page 39)

SMA Solar Technology AG 8 Commissioning
Installation Manual TCS-JP-IA-en-10 39
8.4 Checking the AC Low Voltage at the Low-Voltage Power Switch
1. Check the low voltage for the right-hand rotating magnetic field. Correct if necessary.
2. Measure the low voltage between the line conductors and log in the commissioning report.
– L
1
- L
2
– L
1
- L
3
– L
2
- L
3
☑ The low voltage is within ± 5 V of the nominal voltage of the inverter.
✖ Does the low voltage vary from the nominal voltage of the inverter by more than ± 5 V?
• Disconnect the high-voltage transformer from voltage sources.
• Have a duly authorized person adjust the conversion ratio of the high-voltage transformer by the tap changer.
☑ The tap changer clicks into place.
• Proceed to Step 2.