AXIAL MAGNETIC FIELD VACUUM FAULT INTERRUPTER

摘要

An improved vacuum interrupter (500) is disclosed. The vacuum interrupter (500) includes a ring-shaped structure (508, 510) placed between a contact support structure (502, 504) and an electrical contact (506, 512) associated with the contact support structure (502, 504). A resistivity of the ring-shaped structure (508, 510) is higher than that of the contact support structure (502, 504), so that current traversing the ring-shaped structure (508, 510) on its way from the contact support structure (502, 504) to the electrical contact (506, 512) is evenly distributed. The ring-shaped structure (508, 510) may be fit into an end portion of the contact support structure (502, 504), the end portion having an diameter less than an outer diameter of the support structure, but greater than an inner diameter of the support structure. Alternatively, the end portion may be used without the ring-shaped portion, in which case the electrical contact (506, 512) may be shaped to fit into the end portion.