SMA America, LLC
6 Electrical Connection
Installation Manual
SB3-5TLUS22-IA-en-10
45
5. Connect the inverter connection cable to the
DC Disconnect (torque: 15 in-lb. (1.7 Nm)).
• Connect the red cable to
RD
.
• Connect the orange cable to
OR
.
• Connect the black cable to
BK
.
6. Install conduits with conduit fittings in the enclosure openings on the DC Disconnect.
7. Lead the DC cables of the PV strings, the DC equipment grounding conductors and, if specified,
the grounding electrode conductor through the conduits into the DC Disconnect.
8. Strip the insulation of the insulated conductors by a length of
1
⁄
2
in. (12 mm).
9. Connect the grounding cable of the PV array to one
of the terminals with the grounding symbol with a
circle (torque: 15 in-lb. (1.7 Nm)).
10. If required, connect the grounding electrode
conductor to the terminal with the grounding
symbol without a circle (torque: 15 in-lb. (1.7 Nm)).
4.
Damage to the DC Disconnect due to enlarged knockout holes
Enlarged knockout holes enable moisture to penetrate the DC Disconnect which could damage
electronic components in the DC Disconnect.
• Do not enlarge the knockout holes.
