Contact arm of electrical device

The utility model provides a contact arm of an electrical device. The contact arm of the electrical device includes a mounting end (1311), a contact arm end (1316) and a bended portion (1310) arranged between the mounting end (1311) and the contact arm end (1316). The plane of the mounting end (1311) is perpendicular to the plane of the contact arm end (1316), a bended deviation angle (alpha) in the range of 90 to 135 degrees is formed between the intersecting line of the above two planes and the central axis in the length direction of the contact arm end (1316), and the bended deviation angle is used for changing a space between a left contact arm and a right contact arm. A space between an upper pole and a lower pole of the contact arm and the space between a left contact arm and a right contact arm can be changed through adjusting the position of a mounting hole (1315) in the mounting end (1311), to satisfy users' different demands. The utility model also provides a three-phase breaker employed the contact