6 Electrical Connection
Overview of the necessary conductor lengths within the AC connection unit
Figure 7: Interior view of the AC connection unit with dimensions for the conductors (dimensions in mm (in))
Load-break switch and cable protection:
Damage to the inverter due to the use of screw-type fuses as load-break
switch
Screw-type fuses are not load-break switches.
• Do not use screw-type fuses as load-break switches.
• Use a load-break switch or a circuit breaker for load disconnection.
☐ In PV systems with multiple inverters, protect each inverter with its own overcurrent protective
device. Observe the maximum permissible fuse protection (see Section 10 "Technical Data",
page 56). This will prevent residual voltage from being present at the corresponding cable
after disconnection.
☐ The load-break switch or circuit breaker must be listed (see National Electrical Code
NFPA 70).
☐ Loads installed between the inverter and the overcurrent protective device must be fused
separately.
☐ The overcurrent protective device for the AC output circuit is to be provided by others.
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