High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Vacuum
Patent
1996-10-15
1998-05-19
Spyrou, Cassandra C.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Vacuum
200289, H01H 3366, H01H 162
Patent
active
057538751
ABSTRACT:
Heat sinks are placed on the contact stems of a vacuum interrupter between the vacuum bottle and junctions with the terminal conductors to lower the temperature of these junctions. The heat sinks are formed by a stack of thin laminations having central openings with inwardly directed tabs which bite into and secure the laminations to the stems. The laminations have aligned slots forming axial passages for cooling air. Preferably, the slots are enclosed to eliminate sharp peripheral edges to reduce the potential for flash over. In one embodiment, the slots are not formed by removing material but by bending it out of the plane of the lamination to maximize heat radiating surface area and to generate turbulent cooling air flow for increased cooling efficiency. An axially extending peripheral lip can provide axial spacing between laminations.
REFERENCES:
patent: 4005297 (1977-01-01), Cleaveland
patent: 4376235 (1983-03-01), Milianowicz
patent: 4384179 (1983-05-01), Milianowicz
patent: 4695924 (1987-09-01), Wozniczka
patent: 5473208 (1995-12-01), Stihi
patent: 5530216 (1996-06-01), Benke et al.
"Medium Voltage Current Transformer Systems" SA-111847, date unknown.
Benke James J.
Gress, Jr. Daniel Dickson
Palmieri Daniel Evan
Eaton Corporation
Hayes Michael J.
Moran Martin J.
Spyrou Cassandra C.
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