SMA SUNNY TRIPOWER CORE1-US - Page 26

6 Electrical Connection
SMA Solar Technology America LLC
Installation ManualSTP50-US-40-IA-en_es-1126
Overview of the necessary conductor lengths within the AC connection unit
199
(7.8)
199
(7.8)
193
(7.6)
193
(7.6)
181
(7.1)
181
(7.1)
Figure 7: Interior view of the AC connection unit with dimensions for the conductors (dimensions in mm (in))
Load-break switch and cable protection:
NOTICE
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
®
ANSI/
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.
ENGLISH