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1 sustaining current
English-Russian dictionary of Information technology > sustaining current
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2 sustaining current
Большой англо-русский и русско-английский словарь > sustaining current
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3 sustaining current
Англо-русский словарь технических терминов > sustaining current
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4 sustaining current
1) Техника: граничный ток (выходного транзистора усилителя), поддерживающий ток (криосара)2) Макаров: поддерживающий ток (в криосаре) -
5 sustaining current
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6 sustaining current
The New English-Russian Dictionary of Radio-electronics > sustaining current
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7 sustaining current
English-Russian dictionary of modern telecommunications > sustaining current
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8 sustaining current
English-Russian dictionary of electronics > sustaining current
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9 sustaining
1. поддержка2. поддерживающий -
10 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 -
11 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 -
12 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
-
13 current-carrying capacity
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
предельно допустимый ток
—
[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
прочность печатной платы к токовой нагрузке
Свойство печатной платы сохранять электрические и механические характеристики после воздействия максимально допустимой токовой нагрузки на печатный проводник или металлизированное отверстие печатной платы.
[ ГОСТ Р 53386-2009]Тематики
EN
Англо-русский словарь нормативно-технической терминологии > current-carrying capacity
-
14 continuous current-carrying capacity
длительная пропускная способность по току
—
[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
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Англо-русский словарь нормативно-технической терминологии > continuous current-carrying capacity
-
15 continuous current
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
непрерывный ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999]Тематики
- электротехника, основные понятия
EN
Англо-русский словарь нормативно-технической терминологии > continuous current
-
16 граничный ток
Большой англо-русский и русско-английский словарь > граничный ток
-
17 поддерживающий ток
Большой англо-русский и русско-английский словарь > поддерживающий ток
-
18 граничный ток
( выходного транзистора усилителя) sustaining current -
19 поддерживающий ток
( криосара) sustaining currentАнгло-русский словарь технических терминов > поддерживающий ток
-
20 courant admissible, m
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
- 1
- 2
См. также в других словарях:
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