Protective housing for electrical device and electrical device comprising such housing

The invention relates to an electrically insulating protection box (2) for an electrical device, comprising at least one electrical busbar (4), the protection box comprising at least two housings (8, 10), each housing (8, 10) comprising an inner surface for surrounding at least a portion of the busbar at a junction zone, at least 50% of the area of said inner surface being in direct contact with conductive elements of the junction zone. 该用于电气设备的电绝缘保护盒(2)包括至少一个电气母线(4)，该保护盒包括至少两个外壳(8、10)，每个外壳(8、10)包括用于在接合区处围绕母线的至少一部分的内表面，所述内表面的至少50％的区域与接合区的导电元件直接接触。