SMA SC 500HE-20 Installation - Manual (Page 61)

SMA Solar Technology AG 12 Commissioning
Installation Manual SCxxxHE-20-IA-IEN111210 61
12.3.3 Checking the External Voltage Supply
1. Using a rotating-field instrument, measure the rotating magnetic field at the miniature circuit-
breaker of the external voltage supply. To do this, use the measuring points on the miniature
circuit-breaker of the external voltage supply.
☑ The detected rotating magnetic field is right-rotating.
✖ Is the detected rotating magnetic field left-rotating?
2 line conductors are incorrectly connected.
• Swap over the connections of the two of the three line conductors and repeat the
measurement.
2. Measure the AC voltages at the miniature circuit-breaker of the external voltage supply between
the following terminals and record in the Commissioning Report: To do this, use the measuring
points on the miniature circuit-breaker of the external voltage supply.
– L
1
- L
2
– L
1
- L
3
– L
2
- L
3
– L
1
- N
– L
2
- N
– L
3
- N
– L
1
- PE
– L
2
- PE
– L
3
- PE
– N - PE
☑ The voltage between the line conductors is within the range of 360 V ... 440 V. The voltage
between line conductor and neutral conductor or PE conductor is within the range of
207 V … 243 V. The voltage between PE conductor and neutral conductor is 0 V.