-
1 high-current arc
English-German dictionary of Electrical Engineering and Electronics > high-current arc
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2 high-current arc
высокоамперная дуга
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
Англо-русский словарь нормативно-технической терминологии > high-current arc
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3 high-current arc
Техника: высокоамперная дуга -
4 high-current arc
дуга высокого тока -
5 high-current arc
сильноточная дуга, сильноточный дуговой разряд -
6 high-current arc
Англо-русский словарь по электроэнергетике > high-current arc
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7 high-current arc discharge
English-russian dictionary of physics > high-current arc discharge
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8 high-current arc ignition
оценка стойкости твёрдых изоляционных материалов к воспламенению под действием сильноточного дугового разрядаАнгло-русский словарь промышленной и научной лексики > high-current arc ignition
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9 ultra-high current arc
Макаров: многоамперная дуга, мощная дуга, сверхмощная дугаУниверсальный англо-русский словарь > ultra-high current arc
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10 ultra-high current arc
Англо-русский словарь по электроэнергетике > ultra-high current arc
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11 high-current carbon arc
high-current carbon arc Hochstromkohlebogen mEnglish-German dictionary of Electrical Engineering and Electronics > high-current carbon arc
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12 current
1) течение; поток4) вчт. текущая запись•-
absorption current
- ac anode current -
action current
-
active current
-
actuating current
-
admissible continuous current
-
air current
-
alongshore current
-
alternate current
-
anode current
-
arbitrary noise current
-
arc current
-
arc-back current
-
arcing ground fault current
-
armature current
-
ascending current
-
audio-frequency current
-
avalanche current
-
back current
-
back short circuit current
-
backward current
-
barogradient current
-
base current
-
beam current
-
bearing currents
-
beating current
-
beat current
-
biasing current
-
bias current
-
biphase current
-
bleeder current
-
blind current
-
blowing current
-
body current
-
bottom current
-
boundary current
-
braking current
-
branch current
-
break induced current
-
breakaway starting current
-
breakdown current
-
breaking current
-
bucking current
-
bulk current
-
bypass current
-
capacitance current
-
capacitive current
-
capacity current
-
carrier current
-
cathode current
-
channel current
-
charging current
-
circulating current
-
circumpolar current
-
collector current
-
complex sinusoidal current
-
complex current
-
conduction current
-
conjugate complex sinusoidal current
-
conjugate complex current
-
constant current
-
consumption current
-
continuous current
-
continuous traction current
-
control current
-
convection current
-
core-loss current
-
creeping current
-
critical current
-
cross current
-
crystal current
-
current of realm
-
current of run-unit
-
current of set
-
cutoff current
-
damped alternating current
-
damped current
-
dark current
-
deep-water current
-
deep current
-
delta currents
-
density current
-
descending current
-
design current
-
dielectric absorption current
-
dielectric current
-
diffusion current
-
direct current
-
direct-axis current
-
discharge current
-
discontinuous current
-
displacement current
-
downward current
-
drift current
-
drive current
-
drop-away current
-
earth current
-
earth fault current
-
eddy currents
-
effective current
-
electric current
-
electrode current
-
electrolysis current
-
electron current
-
electron-beam induced current
-
emission current
-
emitter current
-
equalizing current
-
equivalent input noise current
-
excess current
-
exchange current
-
excitation current
-
external current
-
extra current
-
extraction current
-
extraneous current
-
feedback current
-
field current
-
filament current
-
firing current
-
flood current
-
fluctuating current
-
focusing-coil current
-
focus current
-
fold back current
-
follow current
-
forced alternating current
-
forced current
-
foreign currents
-
forward current
-
Foucault currents
-
free alternating current
-
free current
-
full-load current
-
fusing current
-
galvanic current
-
gas current
-
gate current
-
gate nontrigger current
-
gate trigger current
-
gate turnoff current
-
generation-recombination current
-
gradient current
-
grib current
-
ground current
-
ground-return current
-
harmonic current
-
heat current
-
heater current
-
high-frequency current
-
high-level input current
-
high-level output current
-
holding current
-
hold current
-
hold-on current
-
hole current
-
idle current
-
image current
-
impressed current
-
incident current
-
induced current
-
initial current
-
injection current
-
inphase current
-
input current
-
input leakage current
-
input offset current
-
inrush current
-
inshore current
-
instantaneous carrying current
-
instantaneous current
-
insulation current
-
interference current
-
intermittent current
-
inverse current
-
ion production current
-
ionic current
-
ion current
-
ionization current
-
irradiation-saturation current
-
lagging current
-
latching current
-
leading current
-
leakage current
-
let-go current
-
light current
-
lightning current
-
line charging current
-
linear current
-
load current
-
locked-rotor current
-
loop current
-
loss current
-
low-level input current
-
low-level output current
-
magnetization current
-
majority-carrier current
-
majority current
-
make induced current
-
make-and-brake current
-
making current
-
maximum power current
-
minority-carrier current
-
minority current
-
motor inrush current
-
nearshore current
-
near-surface current
-
net current
-
neutral current
-
neutron current
-
neutron diffusion current
-
noise current
-
no-load current
-
nonsinusoidal current
-
nontrigger current
-
non-turn-off
-
offset current
-
offshore current
-
off-state current
-
on-state current
-
open-circuit current
-
operating current
-
output current
-
overload current
-
parasitic current
-
peak arc current
-
peak current
-
peak switching current
-
peak withstand current
-
peak-point current
-
peak-to-peak current
-
perception current
-
periodic current
-
persistent current
-
phase current
-
phase-fault current
-
phasor current
-
photo-electric current
-
photo current
-
photo-generated current
-
photo-induced current
-
pickup current
-
piezoelectric current
-
pinch current
-
plasma current
-
polarization current
-
polyphase current
-
postarc current
-
power current
-
power follow current
-
prebreakdown current
-
preconduction current
-
primary current
-
principal current
-
probe current
-
pull-in current
-
pulsating current
-
pulse current
-
pyroelectric current
-
quadrature-axis current
-
quiescent current
-
rated current
-
rated temperature-rise current
-
reactive current
-
read current
-
recombination current
-
rectified current
-
reflected current
-
regulated current
-
relative short-circuit current
-
release current
-
residual current
-
rest current
-
return current
-
reverse current
-
reverse-biased current
-
reverse-induced current
-
RF current
-
ringing current
-
rip current
-
ripple current
-
root-mean-square current
-
running current
-
rupturing current
-
saturated drain current
-
saturation current
-
saw-tooth current
-
secondary current
-
secondary-electron emission current
-
shaft currents
-
sheath current
-
shelf current
-
shield current
-
shock current
-
short-circuit current
-
short-noise current
-
short-time thermal current
-
short-time withstand current
-
sine-wave current
-
single-phase current
-
sinusoidal current
-
slope current
-
sneak current
-
spindle-motor current
-
split current
-
stalled-motor current
-
standby current
-
standing current
-
star currents
-
starter current
-
steady leakage current
-
steady surface current
-
steady volume current
-
steady-state current
-
stray current
-
stroke current
-
subsurface current
-
subsynchronous frequency current
-
subsynchronous current
-
subtransient armature current
-
superconduction current
-
superimposed current
-
supply current
-
surface current
-
surface-leakage current
-
surge current
-
suspension current
-
sustained current
-
sustaining current
-
switched current
-
switching current
-
symmetrical alternate current
-
synchronizing current
-
telluric current
-
test current
-
thermal current
-
thermal noise current
-
thermionic current
-
thermostimulated current
-
three-phase current
-
threshold current
-
through current
-
tidal current
-
tolerance current
-
traction current
-
traffic current
-
transfer current
-
transient current
-
transient-decay current
-
transmission-line current
-
trigger current
-
turbidity current
-
turnoff current
-
turn-on current
-
two-phase current
-
undulating current
-
unidirectional current
-
unsymmetrical currents
-
upward current
-
valley point current
-
variable current
-
vector current
-
virtual current
-
voice-frequency current
-
voltaic current
-
wattful current
-
wattless current
-
welding current
-
whirling currents
-
wind current
-
withdrawal current
-
working current
-
work current
-
Zener current
-
zero-sequence current -
13 current
1) (электрический) ток || токовый2) поток; течение || текущий; протекающий3) скорость потока; скорость течения4) течение; ход событий || текущий; относящийся к рассматриваемому моменту времени; современный6) общая тенденция; курс || общепринятый; общераспространённый•- acoustoelectric current
- action current
- active current
- alternating current
- anode current
- antenna current
- arc current
- armature current
- avalanche current
- average current
- back current
- balanced currents
- band-to-band current
- base current
- beam current
- bias current
- biasing current
- bidirectional current
- biphase current
- bleeder current
- blowing current
- branch current
- breakaway current
- breakaway starting current
- breakdown current
- breaking current
- breakover current
- bulk current
- carrier current
- catcher current
- cathode current
- cathode covering current
- cathode-ray current
- channel current
- charging current
- collector current
- collector cutoff current
- collector-junction current
- collector leakage current
- collector-saturation current
- complex current
- complex sinusoidal current
- conduction current
- conjugate complex current
- conjugate complex sinusoidal current
- constant current
- continuous current
- control current
- convection current
- conventional fusing current
- conventional nonfusing current
- critical current
- critical controlling current
- critical grid current
- crystal current
- cutoff current
- cyclic current
- damped current
- dark current
- decaying current
- demarcation current
- diacritical current
- dielectric current
- diffusion current
- digit current
- direct current
- discharge current
- displacement current
- double-injection current
- drain current
- drift current
- drop-away current
- drop-out current
- earth current
- echo current
- eddy currents
- edge leakage current
- effective current
- electric current
- electric induction current
- electrode current
- electrode dark current
- electrode inverse current
- electron current
- emission current
- emitter current
- equivalent input offset current
- equivalent noise current
- erasing current
- excess current
- excitation current
- exciting current
- exponential excess current
- external current
- extra current
- extraction current
- extraneous current
- faradic current
- fault current
- fault electrode current
- feedback current
- field-free emission current
- filament starting current
- filament surge current
- firing current
- flash current
- flection-point emission current
- fluctuating current
- focus current
- focusing current
- follow current
- forward current
- forward-bias current
- Foucault currents
- Frenkel-Poole current
- full-select current
- fusing current
- galvanic current
- gap current
- gas current
- gas ionization current
- gate current
- gate-body leakage current
- gate holding current
- gate nontrigger current
- gate trigger current
- gate turn-off current
- generation-recombination current
- grid current
- ground current
- gun current
- half-select current
- Hall current
- harmonic current
- heater current
- heater-cathode current
- heater-cathode insulation current
- heater starting current
- heater surge current
- heavy current
- high-frequency current
- high-tension current
- high-voltage direct current
- hold current
- holding current
- hole current
- hot-electron current
- hump current
- idle current
- idling current
- image current
- impurity diffusion current
- incident current
- induced current
- inflection-point emission current
- initial symmetrical short-circuit current
- initial-velocity current
- injection current
- input offset current
- interbase current
- intermittent current
- inverse current
- ion current
- ionic current
- ionization current
- irradiation saturation current
- Josephson tunnel current
- lagging current
- latching current
- leading current
- leakage current
- leakage tube current
- Leduc current
- light current
- limiting slider current
- load current
- local current
- locked-rotor current
- longitudinal current
- loop current
- magnetization current
- magnetizing current
- majority current
- majority-carrier current
- make-and-break current
- making current
- marker current
- marking current
- mesh current
- minority current
- minority-carrier current
- Morton wave current
- nerve-action current
- net current
- noise current
- no-load current
- offset current
- off-state current
- one-carrier current
- one-particle current
- open-circuit current
- operating current
- oscillating current
- oscillatory current
- over current
- paired-electron current
- particle current
- peak inverse anode current
- peak plate current
- peak-point current
- peak-switching current
- peak-withstand current
- pedestal current
- periodic current
- persistent current
- phasor current
- photoelectric current
- photon-induced current
- pick-up current
- piezoelectric current
- pinch current
- pinch-off current
- plate current
- poloidal current
- post-arc current
- prebreakdown current
- preconduction current
- preionization current
- preoscillation current
- primary current
- probability current
- probe current
- prospective current
- pull-in current
- pulsating current
- push-pull currents
- push-push currents
- pyroelectric current
- quiescent current
- radiation-induced current
- radiation-induced thermally activated current
- rated current
- rated ac discharge current
- rated coil current
- rated contact current
- rated follow current
- reactive current
- read current
- read-out current
- recombination-generation current
- recording audio-frequency current
- recovery current
- rectified current
- reflected current
- regeneration current
- release current
- residual current
- residual stored current
- resistor-substrate leakage current
- return current
- reverse current
- reverse-bias current
- reverse blocking current
- reverse leakage current
- reverse recovery current
- reverse saturation current
- reversible absorption current
- RF current
- ringing current
- ripple current
- saturation current
- sawtooth current
- SCL current
- secondary current
- selection current
- short-circuit current
- short-circuit current per unit wavelength
- short-time withstand current
- signal output current
- simple harmonic current
- single-electron current
- single-injection current
- sinusoidal current
- skinned current
- sneak current
- source current
- space current
- space-charge-limited current
- spacing current
- spin-polarized current
- split-phase current
- sputtering current
- standing current
- starter transfer current
- starting current
- steady current
- steady short-circuit current
- steady-state current
- stray current
- subthreshold current
- surface current
- surge current
- surge electrode current
- sustaining current
- sweeping-out current
- switching current
- synaptic current
- take-off current
- target current
- telephone current
- telephone carrier current
- telluric current
- thermal current
- thermal-convection current
- thermally activated current
- thermionic current
- three-phase current
- threshold current
- toroidal current
- total current
- transfer current
- transient current
- transient-decay current
- tree-branch current
- tunnel current
- tunneling current
- turn-on base current
- turnover current
- two-carrier current
- undulating current
- undulatory current
- unidirectional current
- unit-step current
- vacancy current
- valley current
- valley-point current
- vector current
- video current
- video record current
- voltage saturation current
- voltaic current
- write current
- Zener current
- zero-field emission current
- zero-voltage current -
14 current
1) (электрический) ток || токовый2) поток; течение || текущий; протекающий3) скорость потока; скорость течения4) течение; ход событий || текущий; относящийся к рассматриваемому моменту времени; современный5) вчт. рабочий (напр. о файле); текущий (напр. о записи)6) общая тенденция; курс || общепринятый; общераспространённый•- acoustoelectric current
- action current
- active current
- alternating current
- anode current
- antenna current
- arc current
- armature current
- avalanche current
- average current
- back current
- balanced currents
- band-to-band current
- base current
- beam current
- bias current
- biasing current
- bidirectional current
- biphase current
- bleeder current
- blowing current
- branch current
- breakaway current
- breakaway starting current
- breakdown current
- breaking current
- breakover current
- bulk current
- carrier current
- catcher current
- cathode covering current
- cathode current
- cathode-ray current
- channel current
- charging current
- collector current
- collector cutoff current
- collector leakage current
- collector-junction current
- collector-saturation current
- complex current
- complex sinusoidal current
- conduction current
- conjugate complex current
- conjugate complex sinusoidal current
- constant current
- continuous current
- control current
- convection current
- conventional fusing current
- conventional nonfusing current
- critical controlling current
- critical current
- critical grid current
- crystal current
- cutoff current
- cyclic current
- damped current
- dark current
- decaying current
- demarcation current
- diacritical current
- dielectric current
- diffusion current
- digit current
- direct current
- discharge current
- displacement current
- double-injection current
- drain current
- drift current
- drop-away current
- drop-out current
- earth current
- echo current
- eddy currents
- edge leakage current
- effective current
- electric current
- electric induction current
- electrode current
- electrode dark current
- electrode inverse current
- electron current
- emission current
- emitter current
- equivalent input offset current
- equivalent noise current
- erasing current
- excess current
- excitation current
- exciting current
- exponential excess current
- external current
- extra current
- extraction current
- extraneous current
- faradic current
- fault current
- fault electrode current
- feedback current
- field-free emission current
- filament starting current
- filament surge current
- firing current
- flash current
- flection-point emission current
- fluctuating current
- focus current
- focusing current
- follow current
- forward current
- forward-bias current
- Foucault currents
- Frenkel-Poole current
- full-select current
- fusing current
- galvanic current
- gap current
- gas current
- gas ionization current
- gate current
- gate holding current
- gate nontrigger current
- gate trigger current
- gate turn-off current
- gate-body leakage current
- generation-recombination current
- grid current
- ground current
- gun current
- half-select current
- Hall current
- harmonic current
- heater current
- heater starting current
- heater surge current
- heater-cathode current
- heater-cathode insulation current
- heavy current
- high-frequency current
- high-tension current
- high-voltage direct current
- hold current
- holding current
- hole current
- hot-electron current
- hump current
- idle current
- idling current
- image current
- impurity diffusion current
- incident current
- induced current
- inflection-point emission current
- initial symmetrical short-circuit current
- initial-velocity current
- injection current
- input offset current
- interbase current
- intermittent current
- inverse current
- ion current
- ionic current
- ionization current
- irradiation saturation current
- Josephson tunnel current
- lagging current
- latching current
- leading current
- leakage current
- leakage tube current
- Leduc current
- light current
- limiting slider current
- load current
- local current
- locked-rotor current
- longitudinal current
- loop current
- magnetization current
- magnetizing current
- majority current
- majority-carrier current
- make-and-break current
- making current
- marker current
- marking current
- mesh current
- minority current
- minority-carrier current
- Morton wave current
- nerve-action current
- net current
- noise current
- no-load current
- offset current
- off-state current
- one-carrier current
- one-particle current
- open-circuit current
- operating current
- oscillating current
- oscillatory current
- over current
- paired-electron current
- particle current
- peak inverse anode current
- peak plate current
- peak-point current
- peak-switching current
- peak-withstand current
- pedestal current
- periodic current
- persistent current
- phasor current
- photoelectric current
- photon-induced current
- pick-up current
- piezoelectric current
- pinch current
- pinch-off current
- plate current
- poloidal current
- post-arc current
- prebreakdown current
- preconduction current
- preionization current
- preoscillation current
- primary current
- probability current
- probe current
- prospective current
- pull-in current
- pulsating current
- push-pull currents
- push-push currents
- pyroelectric current
- quiescent current
- radiation-induced current
- radiation-induced thermally activated current
- rated ac discharge current
- rated coil current
- rated contact current
- rated current
- rated follow current
- reactive current
- read current
- read-out current
- recombination-generation current
- recording audio-frequency current
- recovery current
- rectified current
- reflected current
- regeneration current
- release current
- residual current
- residual stored current
- resistor-substrate leakage current
- return current
- reverse blocking current
- reverse current
- reverse leakage current
- reverse recovery current
- reverse saturation current
- reverse-bias current
- reversible absorption current
- RF current
- ringing current
- ripple current
- saturation current
- sawtooth current
- SCL current
- secondary current
- selection current
- short-circuit current per unit wavelength
- short-circuit current
- short-time withstand current
- signal output current
- simple harmonic current
- single-electron current
- single-injection current
- sinusoidal current
- skinned current
- sneak current
- source current
- space current
- space-charge-limited current
- spacing current
- spin-polarized current
- split-phase current
- sputtering current
- standing current
- starter transfer current
- starting current
- steady current
- steady short-circuit current
- steady-state current
- stray current
- subthreshold current
- surface current
- surge current
- surge electrode current
- sustaining current
- sweeping-out current
- switching current
- synaptic current
- take-off current
- target current
- telephone carrier current
- telephone current
- telluric current
- thermal current
- thermal-convection current
- thermally activated current
- thermionic current
- three-phase current
- threshold current
- toroidal current
- total current
- transfer current
- transient current
- transient-decay current
- tree-branch current
- tunnel current
- tunneling current
- turn-on base current
- turnover current
- two-carrier current
- undulating current
- undulatory current
- unidirectional current
- unit-step current
- vacancy current
- valley current
- valley-point current
- vector current
- video current
- video record current
- voltage saturation current
- voltaic current
- write current
- Zener current
- zero-field emission current
- zero-voltage currentThe New English-Russian Dictionary of Radio-electronics > current
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15 current
1. течение, поток, струя3. текущий, находящийся в обращении— arc welding current
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1. течение; ток; струя, поток2. текущий, теперешний
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течение; поток- ground-loop currents
- measure current
- measuring current
- microlog current
- rising current
- survey current* * * -
16 arc
1) дугав) ( электрическая) дуга; дуговой разрядг) дуга графа2) образовывать дугу || дуговой4) ветвь сюжета ( в телесериале)5) арка; объект в форме арки || арочный•- artificial arc
- breaking arc
- contact arc
- coronal arc
- direct-current arc
- duddle arc
- dummy arc
- electric arc
- flash arc
- frying arc
- glowing arc
- high-fleld-emission arc
- high-pressure arc
- hissing arc
- hot-cathode arc
- keep-ailve arc
- magnetic arc
- mercury arc
- mercury-pool arc
- metal-vapor arc
- network arc
- plasma arc
- precursor arc
- reflex arc
- shear arc
- singing arc
- thermolonic arc
- tracking arc
- tungsten arc
- vacuum arc
- voltaic arc
- xenon arc -
17 arc
1) дугав) (электрическая) дуга; дуговой разрядг) дуга графа2) образовывать дугу || дуговой4) ветвь сюжета ( в телесериале)5) арка; объект в форме арки || арочный•- artificial arc
- breaking arc
- contact arc
- coronal arc
- direct-current arc
- duddle arc
- dummy arc
- electric arc
- flash arc
- frying arc
- glowing arc
- high-fleld-emission arc
- high-pressure arc
- hissing arc
- hot-cathode arc
- keep-ailve arc
- magnetic arc
- mercury arc
- mercury-pool arc
- metal-vapor arc
- network arc
- plasma arc
- precursor arc
- reflex arc
- shear arc
- singing arc
- thermolonic arc
- tracking arc
- tungsten arc
- vacuum arc
- voltaic arc
- xenon arcThe New English-Russian Dictionary of Radio-electronics > arc
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18 high
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19 arc
дуга сварочная; электрическая дуга; дуговой разряд- arc-back- arc baffle - arc becomes harder/softer - arc blazing - arc burn - arc converter - arc crater - arc current - arc drop - arc endurance - arc feeding - arc length - arc of action - arc of cornet - arc of great cycle - arc-over - arc-resistant - arc welding - balance arc - circular arc - compound arc - contact arc - electric arc - electrical arc - externally heated arc - flame arc - flame arc lamp - flaming arc - graduated arc - high-field emission arc - sustained arc - thermonic arc - welding arc -
20 arc fault
- "дуговая" неисправность
"дуговая" неисправность
Неисправность, приводящая к возникновению дуги.
[Интент]Параллельные тексты EN-RU
An arc fault occurs when there is a reduction in the dielectric strength of the insulating means (air, in LV switchboards) interposed between two or more conducting elements at different potential.
The arc is generated at the moment when, due to the high ionization of the air, there is a breakdown of the dielectric of the medium and the consequent flow of the current through it.
In an arc fault the highest stresses are of thermal type and proportional to RaI2 owing to the high value taken by the arc resistance Ra; this because the fault current flows in a medium which is always insulating, even if extremely ionized.
Such stresses manifest themselves essentially in the form of:
• high thermal gradients caused by the quick and intense rise in the air temperature;
• high pressure gradients in the form of pressure wave;
• high ionization of the air with consequent reduction of its insulating strength.
Generally speaking, in a LV assembly designed and tested according to the Standard IEC 60439-1 an arc fault is not very likely to occur; however, should it occur, the consequences would be extremely harmful to both the equipment as well as the personnel (see Chapters 2.2 and 2.3).
The causes of an arc fault can be both technical as well as non technical; among the latter the most frequent are the following:
• personnel errors, above all during maintenance operations;
• installation operations not sufficiently accurate;
• inadequate maintenance, above all in the case of severe environmental conditions.
Among the technical causes of an arc fault in a LV assembly the following ones are to be remembered:
• breakdown of the insulation essentially in the proximity of the supports of the busbars and of the plug-in contacts of the withdrawable units (75% of cases);
• overvoltages generating disruptive discharges between the points at minimum clearances (15% of cases);
• constructional defects of the apparatus (10% of cases).
[ABB]К «дуговой» неисправности, относится неисправность, обусловленная уменьшением электрической прочности изолирующей среды (воздуха в НКУ) между двумя или более токоведущими частями, находящимися под разными электрическими потенциалами.
Дуга образуется в тот момент, когда вследствие высокой ионизации воздуха происходит пробой изолирующей среды, вследствие чего через нее начинает протекать электрический ток.
Проявлением дуговой неисправности, является тепловое воздействие, пропорциональное RaI2 и достигающее большого значения вследствие большого сопротивления дуги Ra.
Дело в том, что ток дуги протекает через среду, которая всегда является изолирующей, пусть даже и чрезвычайно ионизированной.
Указанные воздействия очевидны сами по себе особенно в форме:
• теплового градиента температуры, вызванного быстрым и интенсивным подъемом температуры воздуха;
• высоким градиентом давления в форме волны давления;
• высокой ионизацией воздуха с последующим уменьшением электрической прочности.
Вообще говоря, в НКУ, разработанных и испытанных в соответствии с требованиями стандарта МЭК 60439-1 «дуговая» неисправность маловероятна. Однако, если дуга все таки возникнет, ее последствия буду чрезвычайно тяжелыми как для оборудования, так и для персонала (см. п. 2.2 и 2.3).
Причина дуговой неисправности может носить как технический, так и нетехнический характер. Среди последних наиболее часто возникают следующие:
• ошибки персонала, совершаемые главным образом во время технического обслуживания;
• недостаточно аккуратное выполнение монтажа;
• ненадлежащее техническое обслуживание, главным образом при эксплуатации НКУ в тяжелых условиях окружающей среды.
Среди технических причин дуговой неисправности в НКУ необходимо помнить о следующих:
• пробой изоляции, особенно вблизи опор шин и втычных контактов выдвижных частей НКУ (75 % случаев);
• перенапряжения, вызываемые разрушительными электрическими разрядами между точками с минимальными зазорами (15 % случаев);
• конструктивные дефекты аппаратуры (10 % случаев).
[Перевод Интент]Тематики
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EN
Англо-русский словарь нормативно-технической терминологии > arc fault
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