| 摘要 |
<p>FUSE HANDLING TOOL Disclosed is a tool for removing and installing fuses in metal-enclosed switchgear. The switchgear includes one or more fuses and one or more isolating switches and operating mechanisms for isolating the fuses from a high voltage supply circuit. The fuses are mounted between disengageable contacts that connect the fuse between the supply circuit and a load circuit. Access ports are provided through a front panel of the switchgear and are aligned with the fuses for providing access to the fuses. A tool receiving receptacle is mounted on the front panel around the access ports. The tool comprises a hollow metal housing having a hollow interior and having a flange on one end for being received and retained by the receptacle. The receptacle aligns the hollow interior of the metal housing with the access port, and makes grounding connection from the housing to the front panel. The tool also comprises an operating portion including a handle mounted on one end of an insulator. Mounted on the other end of the insulator is a fuse engaging arrangement that engages the end of the fuse when the engaging arrangement is placed against the end of the fuse and the operating portion is rotated 180.degree.. Rotation in the opposite direction disengages the fuse. The operating portion is adapted to be moved within the hollow metal housing so that the operating portion can be moved into the switchgear against the end of the fuse. The handle is also grounded to the housing so that the handle is at ground potential. Rotation of the tool also causes the isolating switch operating mechanism to open the isolating switch to isolate the fuse from the high voltage supply circuit so that the fuse can be removed from the switchgear for testing and/or replacement and then re-installed. Also, the tool can be used to operate auxiliary apparatus to indicate the condition of the isolating switch and the fuse.</p> |
