SMA 600-US - Manual (Page 42)

7 Commissioning SMA America, LLC
42 CU600-1000US-IA-en-10 Installation Manual
7.2 Commissioning the Connection Unit
The Connection Unit is part of the PV system. All parts of the PV system must be mounted and set up
prior to commissioning the Connection Unit.
Commissioning occurs via the three-pole circuit breaker (see inverter installation manual).
Requirements:
☐ The Connection Unit must be correctly mounted.
☐ All DC cables must be correctly connected.
☐ String fuses must be inserted in the Connection Unit.
☐ Unused output openings on top of the Connection Unit must be closed with UL-listed type 3R
filler plugs.
☐ Unused input openings of the Connection Unit must be closed tightly. The factory-mounted filler
plugs can be used for that purpose.
☐ Connection Unit must be connected to the inverter.
☐ The Connection Unit and the inverter must be connected by a grounding conductor.
☐ The lid of the Connection Unit must be installed.
☐ The three-pole circuit breaker must be correctly rated.
Procedure:
1. Commission the inverter (see inverter installation manual).
2. If the DC switch-disconnector has been protected against restarting, open and detach the
padlock.
3. Turn the DC switch-disconnector of the Connection
Unit counterclockwise by 90° and set to ON.