Passive fault current limiting device
- Wheeling, IL
- Darien, IL
A passive current limiting device and isolator is particularly adapted for use at high power levels for limiting excessive currents in a circuit in a fault condition such as an electrical short. The current limiting device comprises a magnetic core wound with two magnetically opposed, parallel connected coils of copper, a high temperature superconductor or other electrically conducting material, and a fault element connected in series with one of the coils. Under normal operating conditions, the magnetic flux density produced by the two coils cancel each other. Under a fault condition, the fault element is triggered to cause an imbalance in the magnetic flux density between the two coils which results in an increase in the impedance in the coils. While the fault element may be a separate current limiter, switch, fuse, bimetal strip or the like, it preferably is a superconductor current limiter conducting one-half of the current load compared to the same limiter wired to carry the total current of the circuit. The major voltage during a fault condition is in the coils wound on the common core in a preferred embodiment.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- University of Chicago (Chicago, IL)
- Patent Number(s):
- US 5892644
- OSTI ID:
- 872248
- Country of Publication:
- United States
- Language:
- English
Tests of 100 kW High-T/sub c/ superconducting fault current limiter
|
journal | June 1995 |
Short circuit test performance of inductive high T/sub c/ superconducting fault current limiters
|
journal | June 1995 |
Recovery time of superconducting non-inductive reactor type fault current limiter
|
journal | July 1996 |
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Related Subjects
fault
current
limiting
device
isolator
particularly
adapted
power
levels
excessive
currents
circuit
condition
electrical
comprises
magnetic
core
wound
magnetically
opposed
parallel
connected
coils
copper
temperature
superconductor
electrically
conducting
material
element
series
normal
operating
conditions
flux
density
produced
cancel
triggered
imbalance
results
increase
impedance
separate
limiter
switch
fuse
bimetal
strip
preferably
one-half
load
compared
wired
carry
total
major
voltage
common
preferred
embodiment
power levels
conducting material
temperature superconductor
particularly adapted
operating conditions
power level
device comprises
magnetic flux
preferred embodiment
electrically conducting
fault current
magnetic core
current limiting
operating condition
current limiter
normal operating
metal strip
total current
limiting device
parallel connected
fault condition
flux density
current load
superconductor current
rate current
current limit
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