SMA SUNNY TRIPOWER CORE1 Operating Manual page 26

6 Electrical Connection
☐ Sheath stripping length: 290 mm
☐ The cable must be dimensioned in accordance with the local and national directives for the
dimensioning of cables. The requirements for the minimum wire size derive from these
directives. Examples of factors influencing cable dimensioning are: nominal AC current, type of
cable, routing method, cable bundling, ambient temperature and maximum desired line losses
(for calculation of line losses, see the design software "Sunny Design" from software
version 2.0 at www.SMA-Solar.com).
Overview of the required length of the conductor inside the AC connection unit
Figure 8: Interior view of the AC connection unit with dimensions for the conductors (Dimensions in mm)
Load-break switch and cable protection:
Damage to the inverter due to the use of screw-type fuses as load-break
switches
Screw-type fuses (e.g. DIAZED fuse or NEOZED fuse) are not load-break switches.
• Do not use screw-type fuses as load-break switches.
• Use a load-break switch or circuit breaker as a load disconnection unit (for information and
design examples, see the Technical Information "Circuit Breaker" at www.SMA-Solar.com).
☐ In PV systems with multiple inverters, protect each inverter with a separate three-phase circuit
breaker. Make sure to observe the maximum permissible fuse protection (see Section 14
"Technical Data", page 96). This will prevent residual voltage being present at the
corresponding cable after disconnection.
☐ Loads installed between the inverter and the circuit breaker must be fused separately.
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NOTICE
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Operating manual