Siemens GEAFOL Neo Operating Manual page 15

6.3 Low voltage side busbar or cable connections
The low-voltage terminal of the transformer has reserved cable connection holes, and fasteners with loosening preventive
measures are required to fix the cable or bus bar. If it is required to be equipped with copper-aluminium composite foil (cupal)
as specially specified in the contract, the copper-aluminium composite foil (cupal) shall be installed between the low-voltage
terminal of the transformer and the cable, or between the low-voltage terminal of the transformer and the bus bar. Please
refer to the figure below.
Warnings:
• The reliable connection of cables and busbars shall be ensured to avoid obvious external force acting on the connection of transformer.
• In the installation of copper-aluminium composite foil, the copper surface should be in contact with the copper bars and the aluminium
surface should be in contact with the aluminium bars.
Al Cupal Cu
13