| 摘要 |
The invention relates to a mechanical lock for a primary contact element to a fuse, which is arranged in a cylindrical fuse holder tube of a voltage transformer, wherein the fuse is arrangend in close electrical and mechanical contact between the primary contact element and a bottom contact element fixed or fixable at opposite ends of the cylindrical fuse holder tube, and that the bottom contact element is electrically connected to the voltage transformer, and the primary contact element is electrically connected or connectable to a primary connection wire, according to the preamble of claim 1. In order to , enable the use of thread fixation with returnable mechanical lock for voltage transformers, it is proposed, that at least the bottom contact element (5) is a fixed contact element, and the primary contact element (4) is a fixable contact element, and that the primary contact element (4) is provided with a screw thread (6), which corresponds with a complementary screw thread (7) of a ring element fixed inside the cylindrical fuse holder (2) at the side of the primary contact element (4), and that at least one of the screw threads is provided with an at least partial slit (8) orthogonally arranged to the thread long axis (9) in such, that the thread is reversibly be deformable by deformation means (10), so that the concerning relative rotation between the complementary threads is locked. |
