LEGRAND LE06499AE, Инструкция по установке, использованию и техническому обслуживанию

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5.2 Connections on the Low Voltage side - LV
LV terminals are positioned on the upper part of the transformer and they are in aluminium as standard. We recommend
to make the cable connection with tinned-copper cable terminals, connecting one or two cables in each hole.
Cu
Al
Cupal
In the case of connections with busbar it is necessary to use flexible connections to mechanically isolate the transformer
from busbars.
In order to prevent corrosion caused by the direct connection between copper and aluminium, it is necessary to use Cu-
pal intermediate plates (supplied on request) when connecting untreated copper busbars to the LV aluminium terminals.
5.3 Connections on the High Voltage side - HV
The HV terminals positioned on the opposite side to the LV terminals, are made with brass bolts placed at the two ends
of the winding.
In case of connection of cables from the bottom, the upper pins can be inserted on the lower end by inverting the se-
quence of phases in accordance to the example previously reported in the figure.
Do not replace the brass bolts with bolts of a different material: this could alter the connection.