SMA SC 500HE-20 Installation - Manual (Page 27)

SMA Solar Technology AG 6 Preparation for Installation
Installation Manual SCxxxHE-20-IA-IEN111210 27
6.1.5 Requirements for cable routing between inverter and
transformer
☐ The AC cables are 3-phase cables.
☐ Between the transformer and the inverter, there are 3 separate cable routes, e.g., cable
channels, for the AC cables.
☐ The spacing between the cable routes must be at least twice the diameter of an AC cable.
Figure 11: Arrangement of AC cables with three cables per line conductor (example).
Observe cable clearances
Lay an L1, L2 and L3 line conductor in each cable route. The spacing between the cable pairs
must be at least twice the diameter of a cable. This prevents current imbalances.
L2
L1 L3
L2
L1 L3
L2
L1 L3
1d
>2d -- >2d --