SMA SC 250U - Manual (Page 38)

6 Electrical connection SMA America, LLC
38 DISU_SCUS-IA-IUS111711 Installation Guide
6.3.3 Connecting DC cables to DC load break switch by cable lugs
Figure 18: Connection of DC cables to busbar with cable lug
%"/(&3
Voltage is present in PV modules exposed to light. Death resulting from electric shock.
• Cover the PV modules.
• Switch off the fuses in the DC distribution boxes (e.g. Sunny Central String-Monitor) and
secure them against reconnection.
• Follow all safety precautions of the module manufacturer.
%"/(&3
Normally grounded conductors may be ungrounded and energized when a ground-
fault is indicated. Risk of electric shock.
• Test before touching.
• Work on the Disconnect Unit must be carried out by qualified personnel.
Position Description
A Screw head - size: M 12
B Spring washer
C Washer
D Cable lug
E Busbar
F Nut - size: M 12