System and apparatus for underground transformer installation专利检索-中性点电缆，导体和接线专利检索查询-专利查询网

System and apparatus for underground transformer installation

阅读：212发布：2024-01-02

专利汇可以提供System and apparatus for underground transformer installation专利检索，专利查询，专利分析的服务。并且In an underground distribution transformer system the tank of the transformer is connected to a protective grounded anode, and is connected to the system neutral only by way of a voltage responsive shunt bypass. The shunt bypass is comprised of an encapsulated device including a lead disk connected to one terminal thereof and separated from another lead disk connected to the other terminal thereof by a Mylar disk having a central aperture. Spring loading is provided in the device for urging the lead disks together when they are melted due to arc-over currents in the gap defined by the Mylar disk.，下面是System and apparatus for underground transformer installation专利的具体信息内容。

权利要求

1. An electric device having first and second normally electrically isolated terminals, and means for establishing a permanent electrical connection between said terminals upon the occurrence Of an electric potential above a predetermined magnitude between said terminals, said means comprising a first contact connected to said first terminal, a second contact connected to said second terminal, a fusible element between said first and second contacts, and spring means urging said contacts together to compress said fusible element therebetween, said fusible element comprising a first lead disk contacting said first contact, a second lead disk contacting said second contact, an insulating washer between said first and second lead disks and electrically separating them, said washer defining an air gap between said lead disks, whereby electric potentials between said potentials above said predetermined magnitude affects an arc across said gap to melt said lead disks.

2. An electrical device comprising a conductive tube, a conductive plug in one end of said tube and forming one terminal of said device, a flexible lead positioned to extend into the other end of said tube, said flexible lead forming a second terminal of said device, means for rigidly holding said flexible lead in insulated relationship in said other end of said tube, a contact disk within said tube and electrically connected to the end of said lead therewithin and electrically insulated from said tube, a fusible element between said contact disk and said plug, and helical spring means surround said flexible lead within said tube and urging said contact disk into engagement with said fusible element, said fusible element comprising a first lead disk in contact with said plug, a second lead disk in contact with said contact disk, and an insulating washer between said first and second lead disks and holding said lead disks out of electrical connection, said insulating washer forming an air gap between said lead disks.

3. The device of claim 2 in which said insulating washer is a Mylar washer.

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