was in low supply

 

постоянный ток
Электрический ток, не изменяющийся во времени.
Примечание — Аналогично определяют постоянные электрическое напряжение, электродвижущую силу, магнитный поток и т. д.
[ ГОСТ Р 52002-2003]

Параллельные тексты EN-RU

For definition, the electric current called “direct” has a unidirectional trend constant in time.
As a matter of fact, by analyzing the motion of the charges at a point crossed by a direct current, it results that the quantity of charge (Q) flowing through that point (or better, through that cross section) in each instant is always the same.
[ABB]

Постоянным током называется электрический ток, значение и направление которого, не изменяются во времени.
Если рассматривать постоянный ток как прохождение элементарных электрических зарядов через определенную точку, то значение заряда (Q), протекающего через эту точку (а вернее через это поперечное сечение проводника) за единицу времени будет постоянным.
[Перевод Интент]

Direct current, which was once the main means of distributing electric power, is still widespread today in the electrical plants supplying particular industrial applications.

The advantages in terms of settings, offered by the employ of d.c. motors and by supply through a single line, make direct current supply a good solution for railway and underground systems, trams, lifts and other transport means.

In addition, direct current is used in conversion plants (installations where different types of energy are converted into electrical direct energy, e.g. photovoltaic plants) and, above all, in those emergency applications where an auxiliary energy source is required to supply essential services, such as protection systems, emergency lighting, wards and factories, alarm systems, computer centers, etc..

Accumulators - for example – constitute the most reliable energy source for these services, both directly in direct current as well as by means of uninterruptible power supply units (UPS), when loads are supplied in alternating current.
[ABB]

Когда-то электрическая энергия передавалась и распределялась только на постоянном токе. Но и в настоящее время в отдельных отраслях промышленности постоянный ток применяется достаточно широко.

Возможности использования двигателей постоянного тока и передачи электроэнергии по линии с меньшим числом проводников дают неоспоримые преимущества при электроснабжении железных дорог, подземного транспорта, трамваев, лифтов и т. д.

Кроме того, существуют источники постоянного тока, являющиеся преобразователями различных видов энергии непосредственно в электрическую энергию, например, фотоэлектрические станции. Дополнительные источники постоянного тока применяют в аварийных ситуациях для питания систем защиты, аварийного освещения жилых районов и на производстве, систем сигнализации, компьютерных центров и т. д.

Для решения указанных задач наиболее подходящим источником электроэнергии является аккумулятор. Нагрузки постоянного тока получают электропитание непосредственно от аккумулятора. Нагрузки переменного тока – от источника бесперебойного питания (ИБП), частью которого является аккумулятор.
[Перевод Интент]

Direct current can be generated:
- by using batteries or accumulators where the current is generated directly through chemical processes;
- by the rectification of alternating current through rectifiers (static conversion);
- by the conversion of mechanical work into electrical energy using dynamos (production through rotating machines).
[ABB]

Постоянный ток можно получить следующими способами:
- от аккумуляторов, в которых электрическая энергия образуется за счет происходящих внутри аккумулятора химических реакций;
- выпрямлением переменного тока с помощью выпрямителей (статических преобразователей);
- преобразованием механической энергии в электрическую с помощью генераторов постоянного тока (вращающихся машин).
[Перевод Интент]

In the low voltage field, direct current is used for different applications, which, in the following pages, have been divided into four macrofamilies including:

- conversion into other forms of electrical energy (photovoltaic plants, above all where accumulator batteries are used);
- electric traction (tram-lines, underground railways, etc.);
- supply of emergency or auxiliary services;
- particular industrial installations (electrolytic processes, etc.).
[ABB]

Можно выделить четыре области применения постоянного тока в низковольтных электроустановках:

- преобразование различных видов энергии в электрическую (фотоэлектрические установки с аккумуляторными батареями);
- энергоснабжение транспорта на электрической тяге (трамваи, метро и т. д.)
- электропитание аварийных или вспомогательных служб;
- специальные промышленные установки (например, с использованием электролитических процессов и т. п.).
[Интент]

Тематики

• электротехника, основные понятия

Синонимы

• постоянный электрический ток

EN

• constant current
• DC
• direct current

. проверка на месте; удерживать на месте

•

The principal dimensions of the arch may be dictated by the conditions at the site.

•

These units will be assembled at site.

•

The magnetic field was scanned with plugs in position.

•

This is a method for in situ insulation.

•

The units may be fitted to an existing valve in situ.

•

We found a locally available supply of aggregate.

•

On-the-site casting of concrete.

•

An on-the-spot investigation was conducted.

•

Towers are assembled on the spot by the erecting crew.

•

An extensive theoretical analysis was followed by a detailed on-site measurement programme.

* * *

 The fuel processing for the semiclean liquid fuel was off site; the low-Btu gas was produced on site.

 Manufacturers typically recommend on-site replacement of the entire assembly when servicing is necessary.

 The calibration was performed in situ, and under the same conditions of operation that are present when the tests are performed.

 A better procedure is to calibrate in-place or on-line so that stresses and connection errors are acknowledged and eliminated as random, unknown errors.

 So our analyst, with the help of a pool of experts, can frequently restore your terminals on the spot.

 The Model 572 permits sophisticated measurement and control functions, as well as on-the-spot calibration.

 All parameters, except smoke, are recorded locally and are transmitted to the data acquisition system.

. впоследствии

•

We next describe the waterfront shapes.

•

The steel is heated to a suitable temperature and subsequently (or then) quenched.

•

They first do... Thereupon they take tools and dig...

•

The measurement was repeated after five minutes and thereafter at intervals until...

* * *

 Then each pin was weighed twice and a mean value taken.

 Next the air tank was turned on to supply air at a low rate.

 The flow contracts to circumvent the blockage and subsequently expands to fill the cross section.

— а затем

— а затем опять

— а уж затем

—включить..., затем переключить на

— вначале..., а затем

— вначале..., затем..., после этого

— возрастает..., а затем падает

— далее идет... и затем

— затем мы можем в общем случае принять, что

— затем полученные таким образом значения можно

— наибольшее влияние, как можно видеть, испытывает..., затем... и наконец

— описание результатов начинается с..., затем описывается

— рекомендуется затем

— сначала..., а затем

— сначала..., затем... и наконец

— снять..., а затем установить на место

 

дельта реки
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

EN

delta
A delta is a vast, fan-shaped creation of land, or low-lying plain, formed from successive layers of sediment washed from uplands to the mouth of some rivers, such as the Nile, the Mississippi and the Ganges. The nutrient-rich sediment is deposited by rivers at the point where, or before which, the river flows into the sea. Deltas are formed when rivers supply and deposit sediments more quickly that they can be removed by waves of ocean currents. The importance of deltas was first discovered by prehistoric man, who was attracted to them because of their abundant animal and plant life. Connecting waterways through the deltas later provided natural routes for navigation and trade, and opened up access to the interior. Deltas are highly fertile and often highly populated areas. They would be under serious threat of flooding from any sea-level rise. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

Тематики

• охрана окружающей среды

EN

• delta

DE

• Delta

FR

• delta

 

дельта реки
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

EN

delta
A delta is a vast, fan-shaped creation of land, or low-lying plain, formed from successive layers of sediment washed from uplands to the mouth of some rivers, such as the Nile, the Mississippi and the Ganges. The nutrient-rich sediment is deposited by rivers at the point where, or before which, the river flows into the sea. Deltas are formed when rivers supply and deposit sediments more quickly that they can be removed by waves of ocean currents. The importance of deltas was first discovered by prehistoric man, who was attracted to them because of their abundant animal and plant life. Connecting waterways through the deltas later provided natural routes for navigation and trade, and opened up access to the interior. Deltas are highly fertile and often highly populated areas. They would be under serious threat of flooding from any sea-level rise. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

Тематики

• охрана окружающей среды

EN

• delta

DE

• Delta

FR

• delta

 

дельта реки
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

EN

delta
A delta is a vast, fan-shaped creation of land, or low-lying plain, formed from successive layers of sediment washed from uplands to the mouth of some rivers, such as the Nile, the Mississippi and the Ganges. The nutrient-rich sediment is deposited by rivers at the point where, or before which, the river flows into the sea. Deltas are formed when rivers supply and deposit sediments more quickly that they can be removed by waves of ocean currents. The importance of deltas was first discovered by prehistoric man, who was attracted to them because of their abundant animal and plant life. Connecting waterways through the deltas later provided natural routes for navigation and trade, and opened up access to the interior. Deltas are highly fertile and often highly populated areas. They would be under serious threat of flooding from any sea-level rise. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

Тематики

• охрана окружающей среды

EN

• delta

DE

• Delta

FR

• delta