6 Electrical Connection
SMA America, LLC
44
SB3-5TLUS22-IA-en-10
Installation Manual
Additionally required mounting material (not included in the scope of delivery):
☐ Number of rainproof or waterproof conduit fittings required (
3
⁄
4
in. (19 mm))
☐ Number of rigid conduits required (
3
⁄
4
in. (19 mm))
☐ Insulated screwdriver, 3.5 mm x 120 mm
6.4.3 Connecting the PV Array
1. Switch off all AC and DC circuit-breakers and miniature circuit-breakers and secure against
re-connection.
2. Undo two screws on the DC Disconnect and
remove the switch and lid of the DC Disconnect.
3. Snap out the required number of knockouts on the
underside of the DC Disconnect for the installation
of the conduit fittings (diameter
1
/
2
in.,
3
/
4
in.
or 1 in.).
Destruction of the inverter due to overvoltage
If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
the inverter can be destroyed by the overvoltage.
• Ensure that the open-circuit voltage of the PV modules does not exceed the maximum input
voltage of the inverter.
• Otherwise, do not connect strings to the inverter; check the design of the PV plant.
