Connecting The Inverter To The Utility Grid - SMA SUNNY TRIPOWER CORE1-US Installation Manual

SMA Solar Technology America LLC
☐ The inverter is equipped with an AC switch in accordance with UL 508 which can be used as
a service switch.
Compatible grid configuration:
☐ The inverter is approved for connection to a utility grid with 480 V or 277 V wye connection.
6.3.2

Connecting the Inverter to the Utility Grid

Requirements:
☐ All electrical installations must be carried out in accordance with the applicable electrical
standards on site and the National Electrical Code
☐ The AC and DC electric circuits are isolated from the enclosure. If required by the National
®
Electrical Code
, ANSI/NFPA 70, the installer is responsible for grounding the system.
☐ The connection requirements of the grid operator must be met.
☐ The grid voltage must be within the permissible range. The exact operating range of the
inverter is specified in the operating parameters.
Procedure:
1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
2. Ensure that the AC load-break switch and the DC load-break switch are in the O position and
are secured against reconnection.
3. If the enclosure lid of the AC Connection Unit is
mounted, remove all ten screws of the enclosure lid
using a Torx screwdriver (TX 25) and remove the
enclosure lid towards the front.
4. Remove the adhesive tape from the enclosure opening for the AC connection.
5. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
6. Attach the conduit to the conduit fitting.
7. Guide the conductors from the conduit into the AC connection unit.
8. Connect the equipment grounding conductor of the utility grid to the equipment grounding
terminal:
• Strip the insulation of the equipment grounding conductor by 27 mm (1.06 in).
• Use a Torx screwdriver (TX 25) to slightly loosen one of the screws with which the clip
and connection plate are connected to the equipment grounding terminal and to
completely remove the other screw.
• Then place the equipment grounding conductor onto the connection plate, route the clip
via the equipment grounding conductor and tighten both screws with a Torx screwdriver
(TX 25) (torque: 6 Nm (53 in-lb)).
• Ensure that the conductor is on the connection plate.
Installation Manual
6 Electrical Connection
®
ANSI/NFPA 70.
STP50-US-40-IA-en_es-11
10x
27