Ac Connection Without Sma Dc Disconnect - SMA SUNNY BOY 5000-US Installation Manual

SMA America, LLC

6.4.2 AC Connection without SMA DC Disconnect

If you replace an existing inverter
• In the switchbox, disconnect the cables for the AC line on which you are working.
1. Switch off the main switch in the main switchbox.
2. Remove the internal switchboard cover.
3
3. Install a ⁄ in. cable gland in the enclosure opening for the AC cables of the Sunny Boy.
4
Observe section 6.2 "Opening the Sunny Boy" (page 38).
4. Between the main switchbox and the breakout opening for the AC cables, install a
conduit.
5. Pull the AC cables from the switchbox through the cable conduit into the Sunny Boy.
6. Connect the AC device grounding conductor to the PE terminal labeled
Do not connect the Sunny Boy 8000-US to a 208 V grid.
208 V and 240 V System Configuration:
7. Connect conductor L1 (AC conductor 1 or UNGROUNDED) to terminal L1.
8. Connect conductor L2 (AC conductor 2) to terminal L2.
9. Connect conductor N (AC conductor N) to terminal N.
When using grounded 240 V or 208 V Delta grids:
• Connect terminal L2 to the grounded phase.
277 V System Configuration:
10. Connect conductor L1 (AC conductor 1 or UNGROUNDED) to terminal L1.
11. Do not use terminal L2.
12. Connect conductor N (AC conductor N) to terminal N.
Open terminal fully before feeding through the cables.
13. Tighten the AC terminal blocks in the inverter with the following torques:
Gray terminal blocks (Weidmüller)
Green terminal blocks (Phoenix)
14. Check that all terminals have the correct wiring and that the cables are secure.
Installation Guide
10 ... 6 AWG: 18 in-lbs. (2 Nm)
8 ... 6 AWG: 40 in-lbs. (4.5 Nm)
10 AWG: 2 in-lbs. (2.5 Nm)
SB50US-80US-eng-IUS112633
Electrical Connection
3
⁄ in. cable
4
in the Sunny Boy.
41