SMA 3000TL-US, Installation Manual

Page: 41 / 88

SMA America, LLC 6 Electrical Connection
Installation Manual SB3-5TLUS22-IA-en-12 41
5. Loosen the screw on the lower side of the
DC Disconnect using an Allen key (AF 4) and
remove the lid of the DC Disconnect.
6. Snap out the required number of knockouts on the
desired side of the DC Disconnect for the
installation of the conduit fittings
(diameter
1
⁄
2
in.,
3
⁄
4
in. or 1 in.).
8. Connect the connection cable of the inverter in the
DC Disconnect. Use a flat-blade screwdriver (blade
width 5 mm) for this (torque 15 in-lb. (1.7 Nm)).
• Insert the red cable into the
RD screw terminal
and tighten the terminal.
• Insert the orange cable into the OR screw
terminal and tighten the terminal.
• Insert the black cable into the BK screw terminal
and tighten the terminal.
9. Install conduits with conduit fittings in the enclosure openings on the DC Disconnect.
10. Feed the DC cables of the PV strings and the DC equipment grounding conductors through the
conduits into the DC Disconnect.
11. Strip the insulation of the insulated conductors by a length of
1
⁄
2
in. (12 mm).
7.
Damage to the DC Disconnect due to enlarged knockouts
Enlarged knockouts enable moisture to penetrate the DC Disconnect which could damage
electronic components in the DC Disconnect.
• Do not enlarge the knockouts.