It is acceptable to use the round edge busbar for HBB, VBB for BlokSeT D, Dc, Mf, Ms and breaker connections. But it is not permissible to use this shape in Mw2 VBB. Because, when the drawers are inserted, the contact area of the plug with the VBB might reduce due to the round edge compared to the flat edge bars. So, the risk of temperature rise is higher in such case. So, it is not permissible to use round edge busbars in Mw2 VBB.

Publié pour: Schneider Electric Belgium