SMA SUNNY BOY 8000-US, Руководство по установке

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SMA Solar Technology AG
60 SB50US-80US-IUS094030 Installation Guide
5.8.2 DC Wiring With SMA DC-Disconnect
Use the following procedure to connect the DC wires to the Sunny Boy with SMA DC-Disconnect:
1. Verify that the AC breaker is OFF.
2. Install a 3/4-inch conduit fitting in the SMA DC-Disconnect’s DC wiring knockout (the knockout
on the left side of the SMA DC-Disconnect). Fasten the conduit fitting on the inside of the SMA
DC-Disconnect with the appropriate locknut.
3. Install 3/4-inch conduit between the SMA DC-Disconnect and the PV array.
4. Pull the DC wires, the ground wires from the PV array and the grounding electrode wire through
the conduit into the interior of the SMA DC-Disconnect.
CAUTION!
Avoid using wire nuts to join any wires together or to make any connections anywhere in
the PV system. Wire nuts are a frequent cause of unreliable, resistive connections, and
ground faults.
The terminal has to be fully opened before you insert the cabel into it.
The SMA DC-Disconnect has provisions for up to four PV strings. The PV UNGROUNDED
and PV GROUNDED terminal block each has four positions, so four pairs of DC-input wires
can be connected in parallel.
5. Connect the grounding electrode to the grounding
electrode conductor terminal (B).
6. Connect the PV generator grounding to the
grounding electrode conductor terminal (A).