Перевод: со всех языков на русский

с русского на все языки

С русского на:
Все языки
Со всех языков на:
Все языки
Английский
Немецкий
Русский
Французский

lower continuous

Толкование Перевод

1 lower continuous

непрерывный снизу

Большой англо-русский и русско-английский словарь > lower continuous
2 lower continuous

непрерывный снизу

Англо-русский словарь технических терминов > lower continuous
3 lower continuous

Техника: непрерывный снизу

Универсальный англо-русский словарь > lower continuous
4 continuous

1) непрерывный; сплошной

2) длительный

3) постоянный

4) неразрезной

5) незатухающий

•

-
left-hand continuous
-
left continuous
-
lower continuous
-
one-sided continuous
-
right-hand continuous
-
right continuous
-
uniformly continuous
-
upper continuous

Англо-русский словарь технических терминов > continuous
5 lower

1) нижний

2) бессировать
3) нижестоящий
4) опускать
5) понижать
6) снижать
7) низший
8) младший
9) низкокипящий
10) низкомолекулярный
– lower arm
– lower atmosphere
– lower barrier
– lower beam
– lower bearing
– lower bound
– lower bromide
– lower center
– lower course
– lower deck
– lower limit
– lower quartile
– lower semi-continuous
– lower semicontinuous
– lower transit

greatest lower bond — точная нижняя грань

greatest lower bound — <math.> нижняя грань, точная нижняя грань

lower case letter — строчная буква

lower control limit — нижний контрольный пробел

lower iron oxide — закись железа

lower pitch limit — < radio> предел высоты тона нижний

lower pure value — нижняя чистая цена

lower side band — нижняя боковая полоса частот

lower story of bridge — нижний ярус моста

lower the quality of a product — снижать качество изделия

to lower right of — снизу справа от

Англо-русский технический словарь > lower
6 continuous current-carrying capacity
1. длительный допустимый ток
2. длительная пропускная способность по току
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
- continuous 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 I_Z
[ 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
- длительно допустимый ток
- допустимый ток
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Англо-русский словарь нормативно-технической терминологии > continuous current-carrying capacity
7 continuous current
1. непрерывный ток
2. длительный допустимый ток
(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 I_Z
[ 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
- длительно допустимый ток
- допустимый ток
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
- continuous current
Англо-русский словарь нормативно-технической терминологии > continuous current
8 lower semi-continuous

полунепрерывный снизу

Большой англо-русский и русско-английский словарь > lower semi-continuous
9 lower semi-continuous

полунепрерывный снизу

Англо-русский технический словарь > lower semi-continuous
10 semi-continuous

полунепрерывный - lower semi-continuous - upper semi-continuous

Большой англо-русский и русско-английский словарь > semi-continuous
11 semi-continuous

полунепрерывный

– lower semi-continuous
– upper semi-continuous

Англо-русский технический словарь > semi-continuous
12 upper, lower, middle feeder of continuous action

Химическое оружие: ВППД, НППД, СППД - верхний, нижний, средний питатель постоянного действия

Универсальный англо-русский словарь > upper, lower, middle feeder of continuous action
13 непрерывный снизу

lower continuous

Большой англо-русский и русско-английский словарь > непрерывный снизу
14 непрерывный снизу

lower continuous

Англо-русский словарь технических терминов > непрерывный снизу
15 полунепрерывный снизу

lower semi-continuous, lower semicontinuous

Большой англо-русский и русско-английский словарь > полунепрерывный снизу
16 function

1) функция, действие || функционировать; действовать

- decision-making function
- essential functions - routine function - safety-related functions
2) функциональное назначение; роль

- auxiliary function
- circuit function - intrinsic function - metering function - primary function - robot function
- system function

3) функциональное подразделение ( предприятия)

- maintenance function
- planning function - service function - support function
4) функциональный узел ( машины)

- press function

5) матем. функциональная зависимость, функция

domain of a function — область определения функции, область изменения независимой переменной

function is periodic in — функция периодична по

function onto itself — отображение (функции) на себя

function vanishes — функция обращается в нуль

function with angular limit — функция с угловым пределом

function with vanishing derivative — функция с равной нулю производной

function without zeros — не обращающаяся в нуль функция

to be an explicit function of — зависеть явно от

to be an implicit function of — зависеть неявно от

- Abelian function

- absolute density function
- absolutely additive function - absolutely bounded function - absolutely continuous function - absolutely integrable function - absolutely monotone function - absolutely summable function - absolutely symmetric function
- abstract function

- accuracy function

- acidity function

- acyclic function

- additive random function

- advanced function

- affect function

- affine function

- algebraically definable function

- algebroid function

- almost bounded function
- almost complex function - almost continuous function - almost convex function - almost everywhere defined function - almost everywhere finite function - almost invariant function - almost periodic function - almost recursive function - almost separably-valued function - almost separating function - almost universal function
- alpha function

- alternating function

- ambiguous function

- analytically extended function
- analytically independent function - analytically representable function
- angle function

- antianalytic function

- antiholomorphic function

- antihyperbolic function

- antilinear function

- antiperiodic function

- antisymmetric function

- antitone function

- antitrigonometric function

- aperiodic function

- Appell function

- approximately continuous function
- approximately differentiable function
- arbitrary function

- arcus function

- area function

- arithmetical function

- arithmetically extensible function

- associated function

- asymmetric function

- asymptotic function

- asymptotical distribution function
- asymptotically differentiable function - asymptotically finite function - asymptotically uniformly optimal function
- atomic function

- attainability function

- autocovariance function

- autocovariance generating function

- automorphic function

- auxiliary function

- averaged function

- averaging function

- balayage function

- barrier function

- basis function

- behavioral function

- beta binomial function

- beta incomplete function

- biadditive function

- biaffine function

- bias function

- bicomplex function

- bicubic function

- biharmonic function

- biinvariant function

- bijective function

- bilinear function

- bimodal function

- bimultiplicative function

- binding function

- binomial distribution function

- binonlinear function

- biregular function

- biunique function

- bivariate function

- boundary characteristic function

- boundary characteristic function

- boundary function

- bounded above function
- bounded below function
- bounded function

- bracket function

- broad function

- broken-line function

- bulb function

- bump function

- canonical function

- canonically definable function

- capacity function

- carpeting function

- carrier function

- casino function

- causal function

- cellwise constant function
- cellwise continuous function
- centering function

- certain function

- chain function

- chance function

- chi-square function

- choice function

- chord function

- chromatic function

- circularly symmetric function
- circumferentially mean p-valent function
- class function

- close to convex function

- cluster function

- clutching function

- codimension function

- coefficient function

- coercive function

- cofinite function

- coherence function

- collapsing function

- color function

- combinatorial function

- combined function

- commutator function

- compact function

- compactly supported function

- compact-valued function

- comparative function
- comparison function - complementary error function
- complementary function

- complementary trigonometric function
- complete analytic function - completely additive function - completely computable function - completely monotone function - completely multiplicative function - completely productive function - completely subadditive function - completely symmetrical function - completely undefined function - complex hyperbolic function
- complex-valued function

- complicated function

- component function

- composite function

- computably ambiguous function

- concave-convex function

- concentrated function

- concentration function

- concordant function

- conditional power function
- conditional risk function
- cone function

- confluent function

- confluent hypergeometric function

- congruence function

- conical function

- conjugate function

- connecting function

- consistent function

- constant-preserving function

- constrained function

- constraint function

- constructive function

- constructively nonrecursive function

- consumption function

- content function

- contiguous function

- continuously differentiable function

- continuum function

- contracting function

- contraction function

- contrast transfer function

- convergent function

- converse function

- convex-concave function

- cosecant function

- cosine function

- cospectral function

- cost function

- cosuperharmonic function

- cotangent function

- countably additive function
- countably multiplicative function - countably valued function
- counting function

- course-of-value function

- covariance function
- covariant function
- cramp function

- created function

- creating function

- criterion function

- critical function

- crosscorrelation function

- cross-covariance function

- cross-variance function

- cumulant function

- cumulant generating function
- cumulative distribution function - cumulative frequency function
- cup function

- curvilinear function

- cuspidal function

- cyclically monotone function

- cyclometric function

- cylinder function

- decay function

- decoding function

- decomposable function

- decomposing function

- defect function
- deficiency function
- deficient function

- degenerate function

- delta function

- denumerably-valued function

- dependence function

- depletion function

- derived function

- descriptive function

- design function

- determinate function

- diagonal function

- diagonalization function

- dibeta function

- difference function

- differential function

- digamma function

- dilogarithmic function

- dimensional function

- dimensionless function

- directing function

- discontinuous function

- discrete function

- discriminant function

- disjoined function

- dispersion function

- dissipative function

- distance function

- disturbing function

- ditonic function

- divergence-free vector function

- divergent function

- divisor function

- dominant function

- donor function

- don't care function
- double limit function
- double-spectral function

- double-valued function

- doubly orthogonal function
- doubly periodic function - doubly recursive function
- dual function

- dyadic function

- effective function

- effectively calculable function
- effectively computable function - effectively constant function - effectively decidable function - effectively variable function
- effectiveness function

- efficiency function

- elementarily recursive function
- elementarily symmetric function
- ellipsoidal function

- elliptic cylinder function

- empirical function

- empty function

- encoding function

- endogeneous function

- entire function of finite type
- entire function of maximum type - entire function of mean type - entire function of potential type - entire function of zero type - entire rational function
- entropy function

- enumerating function

- enumeration function

- envelope function

- equal-ripple function

- equibounded function

- equilibrium function

- equivalence function

- essentially bounded function
- essentially increasing function - essentially integrable function - essentially real function - essentially smooth function
- estimable function

- estimating function

- everywhere continuous function
- everywhere differentiable function - everywhere smooth function
- excessive function

- excitation function

- exhaustion function

- expandable function
- expansible function
- expansion function

- expansive function

- expectation function

- expenditure function

- explicitly bounded function
- explicitly definable function - exponentially convex function - exponentially decreasing function - exponentially increasing function - exponentially multiplicative function - exponentially vanishing function
- extendable function

- extended function

- extensional function

- exterior function

- extremal function

- extremized function

- extremum function

- factor function

- factorable function

- factored function

- factorial function

- fatigue function

- feably oscillating function

- featureless function

- field function

- filter function

- filtration function

- final state function

- finitary function

- finite-dimensional function

- finitely additive function
- finitely mean valent function - finitely measurable function
- finite-path function

- fitted function

- flat function

- flow function

- force function

- forcing function

- forecast function

- formally ordered function

- fractional function

- frequency distribution function

- frequency function

- full function

- fully closed function

- function of a single variable
- function of appropriate behavior - function of bounded characteristic - function of bounded type - function of bounded variation - function of complex variable - function of exponential type - function of finite genus - function of finite variation - function of fractional order
- function of function

- function of high smoothness
- function of infinite type - function of integral order
- function of intervals

- function of matrix

- function of maximal growth
- function of maximal type - function of minimal type - function of mixed variables - function of normal type - function of number theory - function of one variable
- function of phase

- function of position

- function of random variable
- function of rapid descent - function of rapid growth - function of real variable
- function of set

- function of several complex variables

- function of singularities

- function of state

- function of support

- function of time

- function of transition

- function of two variables

- fundamental function

- fuzzy function

- gage function

- gage-like function

- game function

- general recursive function
- general universal function - geometric carrier function
- given function

- global defining function

- goniometric function

- grammatical function

- graph-valued function

- greatest-integer function

- group function

- group-reduction function

- growth function

- halo function

- harmonizable function

- height-gain function

- hemicylindrical function

- Herglotz function

- heuristic function

- higher function

- homographic function

- homology function

- homotopic function

- hyperanalytic function

- hyperarithmetical function

- hyperbolic cylinder function

- hypercomplex function

- hyperelliptic function

- hyperharmonic function

- hyperrank function

- hyperspherical function

- hypertranscendental function

- hypoanalytic function

- ideal function

- imaginary function

- immediate successor function
- implicitly definable function
- improper function

- impulse function

- inclusion function

- inclusive function

- incomplete beta function
- incomplete dibeta function - incomplete gamma function - incomplete tribeta function - incompletely defined function
- increment function

- indecomposable function

- indefinite function

- index function

- indicial function

- individual function

- induced function

- inductive function

- inductively definable function
- inductively defined function - inductively integrable function
- infinite function

- infinitely differentiable function
- infinitely divisible function - infinitely many-valued function
- infinitesimal function

- information function

- information-packing function

- initial function

- injective function

- inner function

- input function

- insolvency function

- integrable function

- integral function of mean type
- integral logarithmic function
- integrating function

- intensity function

- interior function

- intermediary function

- interpolating function

- interpolatory function

- interval function

- inverse hyperbolic function
- inverse trigonometric function - inverted beta function
- invertible function

- irrational function

- irreducible function

- irregular function

- isotone function

- iterated function

- iteration function
- iterative function - joint correlation function - joint density function
- kernel function

- kinked function

- knapsack function

- lacunary function

- lambda function

- lattice function

- Lauricella function

- left-continuous function

- left-invariant function

- left-invertible function

- lexical function

- lifting function

- likelihood function

- limit of function

- limitable function

- limiting function

- linear discriminant function

- linearized function

- linearly dependent function
- linearly separable function
- local function

- locally analytic function

- locally approximable function
- locally bounded function - locally constant function - locally holomorphic function - locally homogeneous function - locally integrable function - locally negligible function - locally regular function - locally summable function - logarithmic generating function - logarithmic integral function
- logarithmically concave function

- logarithmically convex function
- logarithmically infinite function - logarithmically plurisubharmonic function - logarithmically subharmonic function
- logarithmico-exponential function

- logical addition function

- logical function

- logical multiplication function

- logistic function

- log-likelihood function

- loss-of-utility function

- lower closed function

- lower function

- lower measurable function
- lower semicontinuous function
- majorizing function

- many-valued function

- mapping function

- marginal distribution function

- mathematical function

- matrix function

- matrix-convex function

- maximal function

- mean-value function

- measurable function

- measure function

- measure-limited function

- mechanically computable function

- member function

- meromorphic function

- mesh function

- metaharmonic function

- metapragmatic function

- metasemantic function

- metaspherical function

- minimal function

- minimizing function

- minimum function

- minority function

- mixing function

- modified function

- modular function

- molecular set function

- moment generating function

- moment-generating function

- monochromatic function

- monodromic function

- monogenic function

- monomial function

- monomially alternating function
- monotone non-decreasing function - monotone non-increasing function
- monotonic function

- multiaffine function

- multiconstrained function

- multidimensional function

- multiextremal function

- multilinear function

- multiplace function

- multiple valued function

- multiplicity function

- multiplier function

- multiply harmonic function
- multiply periodic function - multiply recursive function
- multithreshold function

- multivalent function

- multivalued function

- multivariable function

- multivariant function

- mutual covariance function

- n-ary function

- nearly continuous function
- negative definite function - negative infinite function
- negligible function

- never-decreasing function

- never-increasing function

- next-state function

- nice function

- n-linear function

- n-metacaloric function

- noise function

- nomographic function

- nonanalytic function

- nonanticipative random function

- nonatomic function

- nonbounded function

- nonconstant function

- nondecreasing function

- nondegenerate function

- nondifferentiable function

- nonelementary function

- nonharmonizable function

- nonincreasing function

- noniterated function

- nonlattice function

- nonmonotonic function

- nonnegative definite function

- nonnegative function

- nonpositive function

- nonrandom function

- nonrecursive function

- nonsymmetrical density function
- nontangentially bounded function
- nontrivial function

- nonvanishing function

- norm function

- normalizable function

- normalized coherence function
- normalized function - normed function - nowhere continuous function - nowhere differentiable function - nowhere monotonic function
- n-place function

- n-point function

- n-th order function
- n-times differentiable function - n-tuply periodic function
- null function

- number-theoretical function

- numeralwise decidable function
- numeralwise expressible function - numeralwise representable function - numerical function - numerically valued function - oblate spheroidal function
- observation function

- odd function

- omega function

- one-loop function

- one-parameter function

- one-periodic function

- one-place function

- one-sheeted function

- one-sided function

- one-step function

- one-valued function

- one-variable function

- open propositional function
- operating characteristic function
- operative function

- operator function

- optimal decision function
- optimal policy function
- optimizable function

- optimized function

- order function

- order of function

- order preserving function

- orderable function

- ordered function

- ordering function

- ordinal function

- orientation function

- original function

- orthonormal function

- oscillating function

- oscillatory function

- outcome function

- outer function

- p-adic function

- pair correlation function

- pairing function

- parabolical cylinder function
- parametrically definable function
- parametrization function

- parametrized function

- partially computable function

- partially differentiable function

- partially recursive function
- partially symmetric function
- partition function

- partition preserving function

- partitionable function

- patch function

- pattern function

- peaked function

- peakless function

- Pearcey function

- penalty function

- pentagamma function

- permanent function

- perturbation function

- phase function

- phi function

- picture function

- piecewise analytic function
- piecewise constant function - piecewise continuously differentiable function
- piecewise continuously differentiable function

- piecewise expanding function
- piecewise linear function - piecewise monotonic function - piecewise polynomial function - piecewise quadratic function - piecewise regular function - piecewise smooth function
- plotted function

- pluriharmonic function

- plurisubharmonic function

- plurisublinear function

- plurisuperharmonic function

- point spread function
- pointwise approximated function
- pointwise bounded function

- pointwise discontinuous function

- policy function

- polyanalytic function

- polydromic function

- polygamma function

- polygenic function

- polygonal function

- polyhedral function

- polymorphic function

- polynomial clutching function

- polynomial function

- polynomially bounded function

- portfolio function

- posinomial function

- positive definite function
- positive homogeneous function - positive infinite function - positive monotone function - positive monotonic function - positive semidefinite function - potentially calculable function - potentially recursive function - power series function
- predetermined function

- predicate function

- predicate preserving function

- predual function

- premeromorphic function

- prescribed function

- primal function

- primary function

- prime-divisor function

- primitively recursive function

- principal function

- probability density function
- probability generating function
- process function

- product function

- production function

- productive function

- profit function

- projection function

- projective function

- propagation function

- proximally continuous function

- proximity function

- pseudoanalytic function

- pseudoconcave function

- pseudoconjugate function

- pseudoconvex function

- pseudodifferentiable function

- pseudoelliptic function

- pseudoharmonic function

- pseudohyperanalytic function

- pseudolikelihood function

- pseudolinear function

- pseudoperiodic function

- pseudopotential function

- pseudoproper function

- pseudorandom function

- pure quadratic function

- quadratic function

- quadratically integrable function
- quadratically summable function
- quantile function

- quasiaffine function

- quasialgebraic function

- quasianalytic function

- quasibounded function

- quasiconcave function

- quasiconformal function

- quasicontinuous function

- quasiconvex function

- quasidifferentiable function

- quasidoubly periodic function

- quasielliptic function

- quasiexcessive function

- quasiexponential function

- quasiharmonic function

- quasihomogeneous function

- quasiinterpolating function

- quasimonotonic function

- quasiperiodic function

- quasipolynomial function

- quasiradial function

- quasirecursive function

- quasiseparable function

- quasismooth function

- quasistandard function

- quasistar function

- quasisummation function

- quasiuniformly continuous function

- quasiunimodal function

- quaternion function

- radially symmetric function

- ramification function

- ramified function

- randomized decision function
- rapidly damped function - rapidly decreasing function - rapidly oscillatory function
- ray function

- Rayleigh dissipation function

- real-definite function

- real-valued function

- recession function

- reciprocal function

- recover function

- rectangle function

- recursively calculable function
- recursively continuous function - recursively convergent function - recursively defined function - recursively differentiable function - recursively divergent function - recursively extensible function
- reduced function

- regression function

- regret function

- regularized function

- regularly varying function

- regulated function

- relation reserving function
- relative distribution function - relative frequency function
- remuneration function

- renewal function

- renormalized function

- repeatedly differentiable function

- representable function

- representative function
- representing function - reproducing kernel function - residual function - residue function
- resolutive function

- resolvent function

- restricted function

- restricting function

- retarded function

- retracting function

- ridge function

- Riemann zeta function

- right-continuous function

- right-invariant function

- roof function

- root-mean-square function

- rudimentary function

- ruin function

- ruled function

- saddle function

- saltus function

- sample distribution function

- sampling function

- sandwich function

- scalar analytical function
- scalarwise integrable function - scalarwise measurable function
- scedastic function

- scheme function

- schlicht function

- search function

- section of function

- sectionally continuous function
- sectionally smooth function
- selective function

- self-dual function

- self-indexing function

- self-reciprocal function

- semiarithmetical function

- semicoercive function

- semicontinuous function

- semicylindrical function

- semidefinite function

- semiintegrable function

- semiinvariant function

- semimodular function

- semimultiplicative function

- semiproductive function

- semispectral function

- semisymmetric function

- sentential function

- separably valued function

- separately continuous function

- separation function

- sequence function

- sequential function

- sequentially continuous function

- set-preserving function

- set-valued function

- shape function

- sharp function

- shifted function

- sifting function

- sigma function

- signaling function

- simple function

- simply measurable function
- simply periodic function
- single-humped function

- singly periodic function
- singly recursive function
- singular function

- singularity function

- sinusoidal function

- skew-symmetric function

- slowly decreasing function
- slowly increasing function - slowly oscillating function - slowly varying function - smoothly varying function - solid spherical harmonic function - solid zonal harmonic function
- source function

- sourcewise representable function

- space-dependent function

- space-time function

- spannable function

- spheroidal function

- spinor-valued function

- spline function

- square-integrable function

- square-sine function

- square-summable function

- stability function

- stable function

- starlike function

- star-shaped function

- stationary random function

- statistical function

- status function

- steadily decreasing function
- steadily increasing function
- stiff function

- stochastic function

- stochastic transition function
- stopped random function
- straight-line function

- stream function

- streamline function

- strength function

- stretch function

- strictly concave function
- strictly convex function - strictly decreasing function - strictly increasing function - strictly integrable function - strictly monotone function
- stroke function

- strongly continuous function
- strongly differentiable function - strongly holomorphic function - strongly integrable function - strongly measurable function - strongly plurisubharmonic function
- structure function

- subadditive function

- subdifferentiable function

- subintegral function

- subinvariant function

- submultiplicative function

- suboperative function

- suboptimized function

- subordinated function

- subparabolic function

- subregular function

- success function

- sufficiently differentiable function

- sum function

- summatory function

- superadditive function

- supercaloric function

- supercontinuous function

- supermedian function

- supermultiplicative function

- superparabolic function

- superregular function

- surface function

- surjective function

- switching function

- symbolic function

- symmetrizable function

- symmetrized function

- tabulated function

- tame function

- tangential function

- target function

- temperate function

- temperature function

- tempered function

- tensor function

- ternary function

- tesseral function

- tetrachoric function

- tetragamma function

- time-limited function

- time-varying function

- tissue function

- toroidal function

- torus function

- total function

- total recursive function
- totally additive function - totally continuous function - totally measurable function - totally multiplicative function - totally positive function
- totient function

- tower function

- trace function

- transferable function

- transfinite function

- transformation function

- transition probability function

- translation function

- translation invariant function

- transmission function

- trapezoidal function

- trend function

- trial function

- triangle function
- triangular function
- tribeta function

- trigamma function

- trilinear function

- true function

- truncated function

- truncation function

- twice differentiable function

- twistor function

- two-parameter function

- two-place function

- two-point function

- two-sided function

- typically real function

- ultradifferentiable function

- ultraspherical function

- unbounded function

- uncertainty function

- uncomputable function

- unconditionally summable function

- unconstrained function

- undecomposable function

- undefined function

- uneven function

- uniform function

- uniformizing function

- uniformly approximable function
- uniformly best decision function - uniformly bounded function - uniformly definable function - uniformly differentiable function - uniformly homotopic function - uniformly integrable function - uniformly limited function - uniformly measurable function - uniformly smooth function
- unimodular function

- uniquely nomographic function

- unisolvent function

- unit function

- unit impulse function
- unit step function - unitary divisor function
- univalent function

- univariate function

- universally measurable function

- unknown function

- unramified function

- upper closed function
- upper measurable function - upper semicontinuous function
- valuation function

- vector-valued function

- vertex function

- voting function

- weakly additive function
- weakly analytic function - weakly continuous function - weakly differentiable function - weakly holomorphic function - weakly measurable function - weakly singular function - weighted random function
- well-behaved function

- well-integrable function

- window function

- wrapping function

- wurzelfrei function

- zero function

- zonal spherical function

English-Russian scientific dictionary > function
17 beam

1) балка, брус, прогон

2) машиностр. поперечина; траверса

3) коромысло ( весов)

4) машиностр. балансир

5) горн. верхняк

6) возд. лонжерон

7) мор. бимс

8) ширина судна

9) траверз ( направление)

10) луч, пучок || излучать, испускать (лучи, частицы)

11) наводить по лучу

12) главный лепесток ( диаграммы направленности антенны), радиолуч

13) навой ( основовязальной машины)

14) швейн. ударник ( вырубочного пресса)

15) грядиль ( плуга)

•

beam for sheet piles — насадка шпунтовой стенки,

beam is 25 m long between supports — пролет балки составляет 25 м;

beam on waterline — ширина судна по ватерлинии,

beam overall — габаритная ширина судна,

beam over deck — ширина судна по палубе,

beam over foils — ширина судна по крыльям,

to approach the beam — приближаться (подходить) к лучу ( курсового маяка),

to built in a beam at one end — заделывать балку одним концов,

to capture the beam — захватывать луч ( курсового маяка);

to clamp a beam — закреплять коромысло,

to embed a beam in concrete — заделывать балку в бетон,

to fly the beam — лететь по лучу ( курсового маяка),

to follow the beam — выдерживать направление по лучу ( курсового маяка),

to hinge a beam to support — опирать балку шарнирно;

to intercept the beam — выходить на ось луча ( курсового маяка),

to steady a beam — арретировать (останавливать) коромысло,

to steer a beam — управлять диаграммой направленности

-
accelerated beam
-
accelerator beam
-
aiming beam
-
anchorage beam
-
angle beam
-
angular beam
-
annular beam
-
antiparallel beams
-
arched beam
-
astigmatic beam
-
asymmetrical beams
-
asymmetrical beam
-
asymmetrical lower beam
-
asymmetrically flared beam
-
axle beam
-
back beam
-
beam of variable cross section
-
beavertail beam
-
betlehem beam
-
bidirectional beam
-
binding beam
-
body bolster beam
-
bogie beam
-
bond beam
-
bottom beam
-
box-section beam
-
box beam
-
brake beam
-
breast beam
-
brick beam
-
bridge beam
-
bridle beam
-
broad-flanged beam
-
broad-radiation pattern beam
-
bucket beam
-
buffer beam
-
built-in beam
-
built-up beam
-
bumper beam
-
bunched electron beam
-
bunched beam
-
camber beam
-
cambered beam
-
cantilever beam
-
cased beam
-
cathode beam
-
channel beam
-
channeled beam
-
charged beam
-
city beam
-
Clarke beam
-
coherent light beam
-
collapsible beam
-
collimated beam
-
combination beam
-
composite beam
-
compound beam
-
concentrated beam
-
conically scanned beam
-
constrained beam
-
continuous beam
-
continuous wing beam
-
contour beam
-
convergent beam
-
cosecant-squared beam
-
counter propagating beams
-
crane runway beam
-
crane beam
-
crownblock beam
-
dam beam
-
deck beam
-
deep beam
-
defocused beam
-
density-modulated beam
-
diffraction-limited beam
-
diffuse beam
-
directed beam
-
directional beam
-
directive beam
-
divergent beam
-
doubly reinforced beam
-
downward beam
-
dragon beam
-
drop beam
-
E beam
-
edge beam
-
electron beam
-
elevating beam
-
emergent beam
-
engine mount beam
-
erasing beam
-
even-arm beam
-
extreme beam
-
false beam
-
fanning beam
-
fan-shaped beam
-
fascia beam
-
fender beam
-
fiber spinning beam
-
fiberglass beam
-
fish-bellied beam
-
fixed beam
-
fixed tie beam
-
fixed-ended beam
-
flat-top beam
-
flitched beam
-
floor beam
-
focused beam
-
folding beam
-
fork beam
-
framing beam
-
free-ended beam
-
free beam
-
front-axle beam
-
gantry beam
-
glide slope beam
-
glued laminated beam
-
graduated beam
-
grating beam
-
grillage beam
-
guidance beam
-
hammer beam
-
hatch way beam
-
hatch-end beam
-
haunched beam
-
H-beam
-
high beam
-
high-directivity beam
-
highly bunched beam
-
high-velocity beam
-
hinged beam
-
hold beam
-
hold-down beam
-
hollow beam
-
homogeneous beam
-
I-beam
-
illuminating beam
-
image beam
-
incident beam
-
injected beam
-
intensity-modulated beam
-
intermediate beam
-
ion beam
-
jesting beam
-
joggle beam
-
junior beam
-
keyed beam
-
king-posted beam
-
laced beam
-
laser beam
-
L-beam
-
lifting beam
-
light beam
-
load beam
-
locked-on beam
-
longitudinal beam
-
loom beam
-
low-altitude beam
-
lower beam
-
low-velocity beam
-
main beam
-
main landing gear beam
-
marginal beam
-
midship beam
-
modulated beam
-
molded beam
-
molecular beam
-
monochromatic beam
-
monoenergetic beam
-
monorail beam
-
multilobed beam
-
multispan beam
-
needle beam
-
negative beam
-
neutral beam
-
nonreentrant beam
-
nonuniform beam
-
object-bearing beam
-
object beam
-
off-axis beam
-
off-path beam
-
on-axis beam
-
optical beam
-
O-type beam
-
outermost beam
-
overhanging beam
-
panting beam
-
parallel flange beam
-
paraxial beam
-
passing beam
-
pencil beam
-
photon beam
-
pile beam
-
pin-ended beam
-
plane-polarized beam
-
play-off beam
-
polarized beam
-
port beam
-
portable beam
-
positive beam
-
pressure beam
-
prestressed concrete beam
-
primary beam
-
probe beam
-
propped cantilever beam
-
propped beam
-
pulsed guidance beam
-
pumping beam
-
pump beam
-
pusher beam
-
quasi-monochromatic beam
-
queen-trussed beam
-
radar beam
-
radio beam
-
reading beam
-
recording beam
-
reentrant beam
-
reference beam
-
reflected beam
-
refracted beam
-
register beam
-
relativistic beam
-
restrained beam
-
return beam
-
rigid beam
-
ring beam
-
ripper beam
-
riveted beam
-
roof beam
-
rotary support beam
-
rotary beam
-
sandwich beam
-
scanning beam
-
scattered beam
-
scene beam
-
secondary beam
-
section beam
-
sector-shaped beam
-
shallow beam
-
sharp beam
-
sheet beam
-
shifting beam
-
simple beam
-
single beam
-
skeleton-form triangular beam
-
slasher beam
-
slay beam
-
sliding batch beam
-
soldier beam
-
space-coherent beam
-
spandrel beam
-
spatially coherent beam
-
spent beam
-
spider beam
-
spinning beam
-
split beam
-
spot beam
-
spreader beam
-
spring beam
-
squinted beam
-
stanchion beam
-
standard beam
-
starboard beam
-
statically determinate beam
-
statically indeterminate beam
-
steered beam
-
stiffening beam
-
stop beam
-
straining beam
-
strut-framed beam
-
supporting beam
-
swing beam
-
tamping beam
-
T-beam
-
tee-beam
-
temporal coherent beam
-
test beam
-
thermal beam
-
through beam
-
tie beam
-
top-trolley beam
-
toroidal beam
-
torque divider installation beam
-
towing beam
-
transverse beam
-
traveling hatchway beam
-
traveling hatch beam
-
trussed beam
-
ultrasonic beam
-
undecked beam
-
unidirectional beam
-
uniform beam
-
uniform-strength beam
-
universal beam
-
variable-elevation beam
-
variable-shape beam
-
walking beam
-
wall beam
-
wave beam
-
way beam
-
wear beam
-
web beam
-
welded beam
-
wide-angle beam
-
wide beam
-
wide-flange beam
-
wooden beam
-
writing beam
-
X-ray beam
-
zee beam

Англо-русский словарь технических терминов > beam
18 series

1) серия; ряд; последовательность

2) геол. толща, свита

3) мат. прогрессия; ряд

expansion in a series — матем. разложение в ряд

series in a closed form — матем. ряд в замкнутом виде, замкнутый ряд

series in terms of powers of x — матем. ряд по степеням x

series with decreasing coefficients — матем. ряд с убывающими коэффициентами

to cut off a series — матем. обрывать ряд

to develop as series in x — матем. разлагать в ряд по степеням x

to expand in power series — матем. разлагать в степенной ряд

to expand into series — матем. разлагать в ряд

to express as power series — матем. выражать в виде степенного ряда

- absolutely convergent series
- absolutely divergent series - absolutely summable series
- adherent series

- adjoint series

- algebraic series

- allied series

- almost convergent series
- almost everywhere summable series - almost periodic series - almost stationary series - almost uniformly convergent series
- alternating series

- analytically continuable series

- anharmonic series

- approximately uniformly convergent series

- arithmetical series

- artificial series

- ascending power series

- ascending series

- associated series

- asymptotic series

- asymptotically stationary series

- autoregressive series

- azygetic series

- Balmer series

- basic series

- bilinear series

- binomial series

- biorthogonal series

- bivariate series

- bounded series

- boundedly convergent series

- canonical series

- cardinal series

- centering series

- central series

- channels in series

- characterictic series

- chief series

- commutatively convergent series

- complementary series

- complemented series

- complete series

- completely characteristic series
- completely convergent series - completely invariant series
- complex-valued series

- composition series

- conditionally convergent series
- configuration counting series - confluent hypergeometric series
- conjugate series

- continuable series

- continuous series

- contragrade series

- convergent series

- convergently beginning series

- convex series

- counting series

- cyclic series

- cyclometric series

- decreasing series

- degenerated series

- descending power series

- descending series

- deterministic series

- diagonal series

- diatomic series

- difference series

- dilution of series

- discrete series

- distribution series

- divergent series

- dominant series
- dominating series
- double series

- dynamic series

- eikonal series

- empirical series

- employment series

- enveloping series

- equiconvergent series

- equisummable series

- essentially convergent series
- essentially divergent series - everywhere convergent series - everywhere divergent series
- evolutive series

- exceptional series

- exponential series

- factorial series

- figure counting series

- filtered series

- finite series

- forecast series

- formal series

- fractional power series
- function counting series
- functional series

- gap series

- general series

- generalized series

- generating series

- heteromorphic series

- homologous series

- hyperconvergent series

- hypergeometric series

- ideal series

- incomplete theta series

- increasing series

- infinite series

- integro-power series

- interpolation series

- invariant series

- inverse power series
- inverse tangent series
- inverted series

- iterated series

- iterative series

- lacunary series

- Laurent series

- logarithmic series

- lower central series

- lower series

- majorant series

- majorizing series

- matrix power series

- matrix series

- mixed series

- monotonic decreasing series
- monotonic increasing series - multidimensional time series
- multiple series

- multiply asymptotic series
- multivariate time series
- natural series

- nearly poised series

- negative series

- nil series

- nonabsolutely convergent series

- nondegenerate series

- non-harmonic Fourier series
- nonuniformly convergent series
- normal series

- normally convergent series
- normally distributed series - normally summable series
- numerical series

- ordered series

- oscillating divergent series

- oscillating series

- p-adic series

- partial series

- periodical series

- permanently convergent series

- polychoric series

- polycyclic series

- polynilpotent series

- positive series

- primitive series

- principal series

- product series

- proper series

- properly divergent series

- pseudoconvergent series

- pseudoequivalence series

- quasieikonal series

- radical series

- random series

- randomly continuous series
- randomly ordered series
- real series

- reciprocal series

- recurring series

- regularly convergent series

- related series

- renormalizable series

- reordered convergent series

- repeated series

- restrictedly summable series

- reversion of series

- semiconvergent series

- semiinfinite series

- series of cosines

- series of curves

- series of equivalence

- series of events

- series of functions

- series of interpolation

- series of observations

- series of perspectivities

- series of positive terms

- series of sines

- series of terraces

- series of translates

- series of vectors

- sine series

- singular series

- slowly convergent series
- slowly oscillating series
- smoothed series

- smoothing series

- smoothly heteromorphic series

- spherical series

- static series

- stationary series

- stationary time series

- statistical series

- strongly lacunary series
- strongly summable series
- subinvariant series

- subnormal series

- temporal series

- tetrachoric series

- theta series

- time series

- transfinite central series

- trend-free series

- trend-reduced series

- triboelectric series

- trigonometric series

- truncated series

- two-fold series

- unconditionally centering series
- unconditionally convergent series - uniformly bounded series - uniformly divergent series
- uniformly equiconvergent series

- uniformly equisummable series
- uniformly summable series
- universal series

- unordered convergent series
- upper central series
- variational series

- vector series

- very strongly summable series

- virial series

- wandering series

- weighted series

- well-ordered series

- well-poised series

4) цикл, сериал

5) электр. последовательное соединение

•

connected in series with — электр. последовательно включённый

to place in series with — электр. включать последовательно

- series of hydroelectric stations

English-Russian scientific dictionary > series
19 courant admissible, m
1. длительный допустимый ток
(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 I_Z
[ 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
- длительно допустимый ток
- допустимый ток
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
20 courant permanent admissible, m
1. длительный допустимый ток
(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 I_Z
[ 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
- длительно допустимый ток
- допустимый ток
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Франко-русский словарь нормативно-технической терминологии > courant permanent admissible, m

Страницы

См. также в других словарях:

Continuous Descent Approach — (CDA) or Optimized Profile Descent (OPD) is a method by which aircraft approach airports prior to landing. It is designed to reduce fuel consumption and noise compared to certain conventional approaches and involves maintaining a constant three… … Wikipedia
Lower Silesian-Mark Railway — Trunk line from 1875 Route number … Wikipedia
Continuous reactor — Continuous reactors (alternatively referred to as flow reactors) carry material as a flowing stream. Reactants are continuously fed into the reactor and emerge as continuous stream of product. Continuous reactors are used for a wide variety of… … Wikipedia
Continuous erythropoitin receptor activator — (CERA) is the generic term for drugs in a new class of third generation erythropoietic stimulating agents (ESAs). CERAs have an extended half life and a mechanism of action that promotes increased stimulation of erythropoietin receptors compared… … Wikipedia
Continuous erythropoietin receptor activator — (CERA) is the generic term for drugs in a new class of third generation erythropoietic stimulating agents (ESAs). In the media, these agents are commonly referred to as EPO , short for erythropoietin. CERAs have an extended half life and a… … Wikipedia
Continuous distillation — Image 1: Typical industrial distillation towers Image 2: A crude oil vacuum distillation column as used in oil refineries … Wikipedia
Continuous casting — The macrostructure of continuously cast copper (99.95% pure), etched, ∅ ≈ 83 mm. Continuous casting, also called strand casting, is the process whereby molten metal is solidified into a semifinished billet, bloom, or slab for subsequent rolling… … Wikipedia
Continuous track — A closeup of continuous tracks on a bulldozer … Wikipedia
Lower extremity of tibia — Bone: Lower extremity of tibia Bones of the right leg. Anterior surface … Wikipedia
Continuous tractive effort — The continuous tractive effort is the highest force that a vehicle can exert over an extended period of time. The term tractive effort is usually used in connection with trains and rail locomotives. Like all forces, tractive effort is most… … Wikipedia
Lower Brandon Plantation — Brandon U.S. National Register of Historic Places U.S. National Historic Landmark … Wikipedia

Словари и энциклопедии на Академике

Перевод: со всех языков на русский

lower continuous

Тематики

EN

Тематики

Синонимы

EN

DE

FR

Тематики

Синонимы

EN

DE

FR

Тематики

EN

Тематики

Синонимы

EN

DE

FR

Тематики

Синонимы

EN

DE

FR

См. также в других словарях:

Поделиться ссылкой на выделенное

Словари и энциклопедии на Академике

Перевод: со всех языков на русский

lower continuous

Тематики

EN

Тематики

Синонимы

EN

DE

FR

Тематики

Синонимы

EN

DE

FR

Тематики

EN

Тематики

Синонимы

EN

DE

FR

Тематики

Синонимы

EN

DE

FR

См. также в других словарях:

Поделиться ссылкой на выделенное

Прямая ссылка: