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Technical Publications
Some common performance characteristics of gasblast interrupters and power expulsion fuses.
Published in English paper_Ramirez.pdf
A High Voltage Vacuum Type Hybrid Current Limiting Fuses For Double Protection Of The Shunt Power Capacitors
Published in English paper_HE.pdf
Power Dissipation of Fuses
Published in English Power Dissipation.pdf
Protection Against Fault Arcs in
Low Voltage Distribution Boards
Published in English Sloot.pdf
Study of the SiO2 Plasma
Physical Parameters: Temperature, Electron Density, Pressure, Radiation
Published in English Rochette.pdf
Fuses - Outdated or Contemporary
Safety Devices
Published in English Contemporary_Fuses.doc
Summary:
Fuses belong to the first products in history of electricity.
They are named after their physical principle of operation: melting
of a metal conductor. A metallic conductor, representing the smallest
cross section in an electric circuit, is melted by currents ex-ceeding
the circuit’s current carrying capacity, thus interrupting
overcurrents and pro-tecting the circuit. The physical principle
of fuse operation is still the same after more than a century of
dramatic development in other fields of electricity.
Fuses Safe and Reliable
Fuses against Circuit-breakers
Published in English Fuse&CB.pdf
and in French Fusibles&Disjoncteurs.pdf
Summary:
In English:
In this document, we discuss the performances
of the Fuses compared to the circuit-breakers:
motor starters, co-ordination, current limiting and let-through
energy, selectivity, isolation, cost difference in use, performance
and life time costs, protection of cables.
En français :
Dans ce document, les performances
des fusibles sont comparées à celles des disjoncteurs
:
Démarreurs moteurs, coordination, courants crête limités,
sélectivité, isolation visible, différence
de coût à l’usage, évolution des performances
dans le temps, protection des câbles.
Current-limiting Fuses Improve Power Quality
Published in English PowerQuality.pdf
Summary:
INTRODUCTION
Voltage sags (sometimes-called voltage dips) in power networks due
to power system short-circuit faults can cause serious problems
for computer systems, adjustable-speed drives, and other industrial
and domestic systems [1,2].The cost of maloperation of equipment
and downtime is becoming increasingly important. A recent study
showed that major industrial users in South Africa suffer annual
losses of more than $200 million due to voltage sags [3].
The effect of a voltage sag is dependent upon its magnitude and
duration. A curve published by the Information Technology Industry
Council (formerly known as CBEMA),is often used as a yardstick for
the assessment of voltage sags. This curve, shown in Fig.1, defines
overvoltage and undervoltage limits as a function of time. The region
in between these two limits is a region of acceptable power quality.
Although the ITIC (CBEMA) curve is strictly only applicable to 120V
single-phase equipment subject to very specific types of voltage
waves, it is nevertheless a useful general guide for other power
systems.
For a bolted fault to ground the faulted bus voltage will drop to
zero. Fig.1 shows that for this case the duration of the fault must
be less than 20ms to lie within the ITIC (CBEMA) limits. It follows
that the speed of operation of protection systems plays a key role
in mitigating the effects of voltage sags and the improvement of
power quality [2,3,4]. The high-speed clearance provided by current-limiting
fuses, which have no moving parts, can make a significant contribution
to the improvement of power quality.
Fuse Technology Improvements
lead to
High-tech Applications
(From Cooper Bussmann)
Published in English Fuse_improvements.pdf
Summary:
Fuse technology improvements lead to high-tech applications.
Fuses have been around for a very long time. Indeed, the first recorded
instance of a fuse (non-enclosed) being used to protect electrical
equipment was in 1864.But it would be wrong to think that the mechanism
of operation of today’s high performance fuse is as simple
as its distant ancestor. Modern fuses are very robust and protect
totally reliably…
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