SMA SC 250U - Manual (Page 39)

SMA America, LLC 6 Electrical connection
Installation Guide DISU_SCUS-IA-IUS111711 39
Figure 19: Mounted cable lugs
Procedure of connecting
2. Position the cable lug or lugs on the busbar.
3. Tighten the screw with a nut in a clockwise direction. For torques refer to the table (see section
6.2 ”Cable requirements”, page 32).
4. Connect all DC cables as illustrated above.
1. /05*$&
Oxide layers on contact surfaces after transport and storing of the Disconnect Unit.
Yield loss resulting due to poor electrical conductivity.
• Before connecting the cables, clean the contact surfaces.
• Use only the non-woven abrasive delivered with the Sunny Central.
• Do not clean the surfaces with sandpaper.
• Do not damage the tin coating.
• Do not touch the contact surfaces after they have been cleaned.