SMA Sunny Central 250U Installation Manual page 37

SMA America, LLC
B C
A
D
Figure 17: Connection of DC cables to busbar with cable lug
Position Description
A Screw head - size: M 12
B Spring washer
C Washer
D Cable lug
E Busbar
F Nut - size: M 12
Procedure of connecting
1.
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.
2. Position the cable lug or lugs on the busbar.
Installation Guide
E
C
B
F
D
6 Electrical connection
A
B C
C
B
DisconACDC_SCUS-IUS103110
F
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