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CoppAl® FAQ's

What are the main advantages of CoppAl® compared to solid copper bars?

CoppAl® bars with the same ampacity are cheaper and lighter. This makes itself particularly noticeable with large cross-sections.



How can I machine CoppAl® bars (drilling, bending, punching etc. …)?

You can machine CoppAl® bars in the same way as conventional copper bars. Bending of more than 90° is also no problem. A bending mandrel does not damage either the copper cladding or the aluminum core.



Must I expect increased corrosion with CoppAl® under normal conditions (e.g. in switchgear systems) or do I need to apply additional corrosion protection?

No, there is no increased corrosion under normal conditions of the kind prevailing in electrical operating rooms.



Can CoppAl® be used in environments with increased corrosion risk?

Outside electrical operating rooms, in environments with increased humidity and in the presence of electrolytes (e.g. sea air), you must expect increased corrosion on the cutting edges and in the area of the boreholes. We therefore recommend additional corrosion protection (e.g. pain coat, grease, acid-free vaseline) in case of doubt.



Is CoppAl® compatible with galvanized screws or stainless steel screws?

Yes, galvanized or stainless steel screws can be used without any problem under normal conditions.



What support spacing should I choose for shortcircuit resistant installation of CoppAl®?

In most cases, you can use the same support spacing as with copper bars.



Are there special supports for CoppAl® bars?

You can use most commercially available supports. If you decide in favor of CoppAl®, you should, however, bear in mind that you need an approx. 20% larger cross-section compared to copper bars for the same nominal current.



How could the thermal and dynamic short-circuit characteristics of CoppAl® be described?

The thermal characteristics are similar to those of copper bars. The dynamic properties are between those of copper and aluminum bars



In which DIN standard can I find more details on CoppAl® bars?

DIN 43 670, Part 2 (aluminum busbars, copper cladding) applies to CoppAl® busbars.

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