Connecting The Inverter To The Utility Grid - SMA SUNNY TRIPOWER 12000TL-US Installation Manual

SMA Solar Technology America LLC
Cable requirements:
☐ The AC cable must be approved for temperatures of over +90°C (+194°F).
☐ The AC cable must be designed in accordance with the local installation requirements.
☐ The AC cable must be made of solid wire or stranded wires.
☐ Conductor cross-section: 10 mm² to 6 mm² (8 AWG to 6 AWG)
☐ Conductor type: copper wire
☐ The maximum cable length subject to conductor cross-section must be observed.
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 a separate three-phase circuit
breaker. Observe the maximum permissible fuse protection (see Section 14 "Technical Data",
page 66). 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 circuit breaker must be fused separately.
☐ The overcurrent protection for the AC output circuit is to be provided by others.
Compatible grid configurations:
Device
STP 12000TL-US-10
STP 15000TL-US-10
STP 20000TL-US-10
STP 24000TL-US-10
STP 30000TL-US-10*
* A neutral conductor connection is necessary for the 480 V / 277 V WYE. A neutral conductor
connection is not necessary for the 480 V Delta.
6.3.2

Connecting the Inverter to the Utility Grid

Requirements:
☐ All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
☐ The AC and DC electric circuits are isolated from the enclosure. If required by section 250 of
the National Electrical Code
system.
Installation Manual
480 V / 277 V WYE
®
ANSI/NFPA 70 or the Canadian Electrical Code
®
, ANSI/NFPA 70, the installer is responsible for grounding the
Yes
Yes
Yes
Yes
Yes
STPTL-US-10-IA-xx-17
6 Electrical Connection
®
, ANSI/
480 V Delta
No
No
No
No
Yes
®
CSA C22.1.
27