Connecting The Ac Cables In The Dc Disconnect - SMA Sunny Boy 6000TL‑US Installation Manual

SMA America, LLC
Load Disconnection Unit
Install a separate miniature circuit-breaker for each inverter, in order that the inverter can be safely
disconnected under load. See the technical data (11 "Technical Data", page 70) for the maximum
permissible rating.
Screw-type fuse elements as load disconnection unit
The Sunny Boy can be damaged during isolation under load.
• Use a miniature circuit-breaker or listed switch-disconnector as load disconnection unit.
• Do not use a screw-type fuse element as switch-disconnector.
5.4.1 Connecting the AC Cables in the DC Disconnect
1. Open all AC and DC circuit breakers or load-disconnecting switches.
2. Open the main fuse in the fuse box.
3. Ensure that there is no voltage between the fuse output and the ground bar. Use a multimeter.
The voltage must be 0 V.
4. Open the DC disconnect as described in section 8.3 "Opening the DC Disconnect", page 58.
5. Remove a suitable knockout opening on the bottom side of the DC disconnect.
6. Lay a cable conduit from the fuse box to the DC disconnect (see chapter 5.2 "Inserting the
Cables in the DC Disconnect", page 31).
7. Lead the AC cable through the cable conduit from the inside of the fuse box into the inside of
the DC Disconnect.
Open terminals fully before insertion of the cables.
8. Connect the AC device grounding conductor to the
PE terminal labeled
Installation Manual
in the DC Disconnect.
5 Electrical Connection
SB6-11TL-US-IA-en-13 35