Page 307 - Electrical Engineering Dictionary

fusible element(s) are designed to melt and fusion a nuclear reaction in which two
interrupt the circuit when current above a light nuclei are combined into a heavier nu-
threshold value flows in the circuit. cleus with a release of energy. Fusion power
reactors have been proposed but as yet never
fuse coordination the process of match- successfully constructed.
ing the fuse or circuit breaker interruption ca-
pability to overload current and short-circuit Futurebus a bus specification standard-
currentandinsuringthattheprotectivedevice ized by the IEEE, originally defined for CPU-
closest to a fault opens first so as to minimize memory data transfers.
the service interruption.
fuzz stick a short hot-stick.

fuse cutout a primary distribution voltage
fuzzification a procedure of transform-
level fuse that employs a replaceable fusible
ing a crisp set or a real-valued number into a
link and provides a means of disconnect. The
fuzzy set.
interrupting rating of a fuse cutout can be
somewhat lower than that of a power fuse,
fuzzifier a fuzzy system that transforms
however.
a crisp (nonfuzzy) input value in a fuzzy set.
The most used fuzzifier is the singleton fuzzi-
fuse link used in nonerasable programma- fier, which interprets a crisp point as a fuzzy
ble memory devices. Each bit in the mem- singleton. It is normally usedinfuzzycontrol
ory device is represented by a separate fuse systems. See also fuzzy inference system,
link. During programming, the link is either fuzzy singleton.
“blown” or left intact to reflect the value of
the bit. See also fusible link ROM. fuzziness the degree or extent of impreci-
sion that is naturally associated with a prop-
fuse reducer an adapter that allows fuses erty, process or concept.
to be installed in fuseclips designed for larger
fuses. fuzzy adaptive control adaptive con-
trol involving fuzzy logic concepts or fuzzy
control involving adaptation. Examples of
fuse saving the practice of tripping distri-
such control are self-organizing fuzzy con-
bution line reclosers or circuit breakers on
trol, model reference fuzzy adaptive control,
a fast trip to beat sectionalizing fuses that
and fuzzy self-tuning control.
are protecting laterals. The following re-
close will restore all load. If the fault re-
fuzzyaggregationnetwork artificialneu-
mains following the fast trip(s), subsequent
ral network that can be trained to produce a
slow trip(s) will allow the fuse to operate on
compact set of fuzzy rules with conjunctive
a permanent fault on the lateral. Fuse saving
and disjunctive antecedents. An aggregation
decreases the customer outage rate but causes
operator is used in each node.
more sags to customers in a fault situation.
fuzzy algorithm an ordered set of fuzzy
fused disconnect a disconnect switch that instructions which upon execution yield an
also employs fuse(s) for the purpose of over- approximate solution to a specified problem.
current protection.
Examples of fuzzy algorithms include fuzzy
c-mean clustering, fuzzy-rule-based classifi-
fusible link ROM read-only memory us- cation, etc.
ing fuse links to represent binary data. See
also fuse link. fuzzy AND See triangular norm.

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2000 by CRC Press LLC