SMA SC 500CP-US - Manual (Page 73)

SMA America, LLC 11 AC Connection
Installation Manual SCCP-US-IA-US_en-41 73
11.3 Overview of the AC Connection
Figure 42: AC connection area with copper bus bars
11.4 Connecting the AC Cables
Description Explanation
A Copper bus bars for line conductor A
B Copper bus bars for line conductor B
C Copper bus bars for line conductor C
:$51,1*
Fire hazard due to the connection of unsuitable terminal lugs
If unsuitable terminal lugs are used or incorrectly mounted, ampacity is not ensured. The connections can overheat.
Death or serious injury due to fire can result.
• Only use two-hole terminal lugs.
• Always connect terminal lugs to the copper bus bars using two screws.
• Make sure that the terminal lugs are correctly mounted.
Fire hazard due to faulty connections and oxidized contact surfaces
Contaminated and incorrectly mounted connections can excessively heat up under high loads. As a result, the
connections may catch fire. Death and serious injury due to fire can result.
• Use only copper terminal lugs or tin-plated aluminum lugs.
• Before connecting the cables, clean the contact surfaces.
• Do not touch the contact surfaces after cleaning.
• Observe the specified torque.
Scope of delivery and torques for tin-plated terminal lugs
For the connection of the terminal lugs, the supplied screws, washers and nuts must be used.
The fender washers and spring washers must not protrude over the terminal lug. The following torques are to be
observed:
• Tin-plated aluminum terminal lugs: 27.5 ft.-lbs. (37 Nm)
• Copper terminal lugs: 44.5 ft.-lbs. (60 Nm)