hager KEH31D00S3LMA, Системное руководство

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Construction and characteristics
Technical changes reserved 11
3.3 Busbar elements: Design
For standard applications with 4 inner bars: the neutral conductor N has the
same cross-section as L1/L2/L3.
The protective earth PE corresponds to the housing.
If a larger cross-section is demanded for the PE, an additional inner bar (PE2) is
inserted. All internal conductors (N, L1, L2, L3 and PE2) have the same
cross-section.
The internal conductors consist of either aluminium or copper and are insulated
over their entire length. The insulation coating consists of an F-class polyester
tape.
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Aluminium conductors are coated over their entire length with zinc, copper
and tin.
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Copper conductors consist of 99.9% pure ETP copper conforming to EN
13601.