Surge-protected cable
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United States of America Patent
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-
Aug 13, 1996
Grant Date -
N/A
app pub date -
Jul 19, 1993
filing date -
Jul 19, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention features a surge-protected cable for use in the wire leads and wire-wound stators of electrical motors. The cable of the invention is of the 'filter line' type. This invention reduces failures in the stator windings of variable frequency drive (VFD) motors by attenuating peak voltages and transient voltage spikes. The 'filter line' type of cable insulation prevents 'dirty' power from unabated travel along the axis. This invention's type of filter line cable features a core member of one or more strands of conductive material overlaid with a primary insulation layer containing ferrites and/or magnetites; this layer is then further overlaid with a flame-retardant insulation jacket layer made of high-temperature material. Both the primary insulation and the outer jacket layer are cross-linked.
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