Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1998-08-12
2000-10-17
Easthom, Karl D.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338 99, 338114, H01C 713
Patent
active
061338206
ABSTRACT:
An exemplary current limiting device comprises first and second electrodes; a composite material between the first and second electrodes, the composite material comprising: (a) a binder, and (b) an electrically conductive filler; a thin layer which provides an inhomogeneous distribution of resistance to the device; a web which reinforces the composite material; and a pressurizer for pressing the electrodes against the composite material; wherein the web is disposed in a volume of the composite material which does not include the thin layer. The current limiting device is simple and reusable, and can be tailored to a plurality of applications, including high voltage/current distribution systems, to protect sensitive components from high fault currents. The device has a robust structure which allows it to repeatedly withstand the high mechanical and thermal stresses which typically accompany switching events in high voltage/current circuits. The robust structure improves the lifetime of the device and provides impact resistance to the device. The device operates without relying on the PTCR effect to limit current.
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Aftergut Siegfried
Duggal Anil Raj
Lee Minyoung
Easthom Karl D.
General Electric Company
Johnson Noreen C.
Maddry Tyler
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