Fault current limiter and alternating current circuit breaker
- Los Alamos, NM
A solid-state circuit breaker and current limiter for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value. Control means are connected to the thyristor legs for limiting the alternating current flow to the load under fault conditions to a predetermined level, and for gating the thyristor bridge under fault conditions to quickly reduce alternating current flowing therethrough to zero and thereafter to maintain the thyristor bridge in an electrically open condition preventing the alternating current from flowing therethrough for a predetermined period of time.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 5726848
- OSTI ID:
- 871417
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
current
limiter
alternating
circuit
breaker
solid-state
load
served
source
impedance
comprising
thyristor
bridge
interposed
legs
nodes
node
connected
coil
third
fourth
value
calculated
limit
flowing
therethrough
predetermined
control
means
limiting
flow
conditions
level
gating
quickly
reduce
zero
thereafter
maintain
electrically
condition
preventing
period
time
thyristor bridge
current circuit
circuit breaker
alternating current
current flow
current source
current flowing
predetermined value
control means
flowing therethrough
fault current
predetermined level
predetermined period
current limiter
solid-state circuit
fault condition
source impedance
limiter comprising
current limit
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