SMA SUNNY CENTRAL 900CP XT - Requirements for Foundation and Cable Arrangement; Requirements for Cable Routing between MV Transformer and Sunny Central

SMA Solar Technology AG 6 Preparation for Installation
Installation Manual SCCPXT-IA-D7-en-42 25
6.1.5 Requirements for Foundation and Cable Arrangement
☐ Openings for the cables must be located in the foundation
underneath the interface cabinet.
☐ Empty conduits for the cables must be laid under the foundation.
☐ The data cables must be kept separate from the AC and DC
cables.
☐ There must be sufficient space available to lay the cables properly.
6.1.6 Requirements for Cable Routing between MV Transformer and
Sunny Central
☐ The AC cables must be bundled in the three-phase system.
☐ Between the MV transformer and the Sunny Central there must be three separate cable routes for the AC cables,
e.g. cable channels.
☐ A line conductor L1, L2 and L3 must be laid in each cable channel. Ensure that the distance between the cable
bundles is at least double that of the diameter of a cable. This will prevent current imbalances.*
Figure12: Arrangement of AC cables with three cables per line conductor (example)
Laying the cables
This manual does not specify at what stage the cables are to be laid in the foundation. The stage at which the cables
are laid must be determined individually for each PV system.
:$51,1*
Risk of fire due to overheating of cables if different cable lengths are used
Cables of differing lengths may cause the cables to overheat and catch fire. This can result in death or serious injury.
• All line conductors from the Sunny Central to the MV transformer must be of the same length.
• The cable length between the connection points must not exceed 15 m.
* For further information, see Technical Information "Cable Set ‒ Requirements for and Laying of Cables between Sunny Central CP and
Transformer Compact Station" at www.SMA-Solar.com.