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1 характеризоваться
•The carburettors incorporate the following advantages:...
•The pentode offers 34 watt maximum plate dissipation and...
•The electrolyte recording medium employed is characterized by a low internal impedance.
•The capacitor features (or exhibits, or shows) extraordinary stability.
•The period since World War II has been marked by a steady advance of...
•The first stages are exemplified by a scarcity of known forms.
Русско-английский научно-технический словарь переводчика > характеризоваться
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2 значительно выше, чем
•The inductance is measured at a frequency well (or much, or considerably, or far) above (or beyond) the self-resonant frequency of the capacitor.
Русско-английский научно-технический словарь переводчика > значительно выше, чем
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3 значительно выше, чем
•The inductance is measured at a frequency well (or much, or considerably, or far) above (or beyond) the self-resonant frequency of the capacitor.
Русско-английский научно-технический словарь переводчика > значительно выше, чем
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4 измерять микроамперами
•The d-c leakage current through the capacitor is quite small; it is usually measured in microamperes.
Русско-английский научно-технический словарь переводчика > измерять микроамперами
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5 напряжение на конденсаторе
Русско-английский научно-технический словарь переводчика > напряжение на конденсаторе
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6 разряжаться на
•The capacitor discharges into the primary circuit.
Русско-английский научно-технический словарь переводчика > разряжаться на
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7 измерять микроамперами
•The d-c leakage current through the capacitor is quite small; it is usually measured in microamperes.
Русско-английский научно-технический словарь переводчика > измерять микроамперами
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8 напряжение на конденсаторе
Русско-английский научно-технический словарь переводчика > напряжение на конденсаторе
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9 заряжать до
•The capacitor is charged to +6 volts.
Русско-английский научно-технический словарь переводчика > заряжать до
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10 заряжать до
•The capacitor is charged to +6 volts.
Русско-английский научно-технический словарь переводчика > заряжать до
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11 виды коррекции коэффициента мощности
виды коррекции коэффициента мощности
-There are 2 types of power factor correction: fixed or automatic.
Fixed power factor correction consists of inserting, in parallel on the network, a capacitor bank whose total power is provided by the assembly of capacitors of identical or different ratings. The bank is energized by a contactor that simultaneously supplies all the capacitors (a single step).
The inrush current peak, in the case of fixed correction, can reach 30 times the nominal current of the capacitor bank.
An automatic power factor correction system, on the other hand, consists of several capacitor banks of identical or different ratings (several steps), energized separately according to the value of the power factor to be corrected.
An electronic device automatically determines the power of the steps to be energized and activates the relevant contactors.
The inrush current peak, in the case of automatic correction, depends on the power of the steps already on duty, and can reach 100 times the nominal current of the step to be energized.
[ABB]
PFC Types
There are two types of Power Factor Correction - Passive PFC and Active PFC.
Passive PFC uses passive elements like a ferrite core inductor on the AC input. It is very easy to implement in existing power circuits although the power factor is low at 60-80%. The proper AC input voltage (115V or 230V) must also be chosen manually. In addition, significant EMI can still result with a 115V AC source. Of course, a 230V AC source will not have this problem!.
Active PFC, on the other hand, uses a switching regulator with active elements like an IC, FETs (Field Effect Transistors) and diodes to create an active PFC circuit. This circuit allows the power supply to achieve a power factor of up to 95%, significantly reduce harmonics and automatically adjusts the AC input voltage. This means you do not have to manually select the AC input voltage. It works with all voltages from 110V to 240V.
[ http://www.techarp.com/showarticle.aspx?artno=81&pgno=1]
Тематики
EN
Русско-английский словарь нормативно-технической терминологии > виды коррекции коэффициента мощности
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12 импульсный источник электропитания с коммутацией тока на первичной стороне
импульсный источник электропитания с коммутацией тока на первичной стороне
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In primary switch mode power supplies, the AC mains voltage is first rectified and smoothed and then chopped ("switched"). Chopping means that the DC voltage is switched periodically at a frequency of 40 to 200 kHz using a power transistor.
In contrast to linearly regulated power supplies, the power transistor does not act as a variable resistor but as a switch instead. This generates a square-wave AC voltage that is transformed to the secondary circuit using a high-frequency transformer. In the secondary circuit, the voltage is rectifi ed and smoothed. The quantity of energy transformed to the secondary circuit is controlled, depending on the load, by varying the chopping rate. The longer the transistor is conductive, the higher is the quantity of energy transformed to the secondary circuit ( pulse width modulation).
Due to the use of high-frequency AC voltage, primary switch mode power supplies have the decisive advantage that their transformer can be of much smaller size than required for the transformation of low frequencies. This reduces the weight and the dissipation inside the unit. The effi ciency of these units is between 85 and 95 %. Since the output voltage does not directly depend on the input voltage, these units can be used for a wide input voltage range and can even be supplied with DC voltage. Furthermore, it is possible to buffer short-time mains voltage breakdowns up to 200 ms. However, the power failure buffering time is limited by the size of capacitor C1 since a longer buffering time requires a higher capacity and thus a bigger size of the capacitor. Especially in case of small power supplies this is not desirable.
Therefore, a practicable compromise has to be made between the size of the power supply and the buffering time.
Primary switch mode power supplies can be used for all purposes. For example, they are suitable for the supply of all kind of electronics as well as for electromechanical applications.
[ABB]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > импульсный источник электропитания с коммутацией тока на первичной стороне
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13 задержка повторного включения ступени компенсации реактивной мощности
задержка повторного включения одной и той же ступени компенсации реактивной мощности
-Параллельные тексты EN-RU
The LED flashing can last in cases when the connection of a step is not possible because of the reconnection time (i.e. capacitor discharge time).
[Legrand]Данный светодиод может мигать продолжительное время из-за того, что включение ступени в данный момент невозможно, поскольку не истекла задержка повторного включения данной ступени (т. е. не истекло время разряда конденсатора.
[Перевод Интент]During this phase, the step control is totally manual and the unit does not control the reconnection time to consent the capacitor discharge).
[Legrand]При выполнении данной операции управление ступенями происходит полностью в ручном режиме, без контроля задержки повторного включения конденсаторных батарей, т. е. без контроля разряда конденсаторов).
[Перевод Интент]If the reconnection time of the selected step has not elapsed, the MAN LED flashes to indicate the operation has been confirmed and will be conducted in due time.
[Legrand]Если задержка повторного включения выбранной ступени еще не истекла, то мигает светодиод «MAN». Этим сообщается оператору, что команда на включение принята и будет выполнена в должное время.
[Перевод Интент]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > задержка повторного включения ступени компенсации реактивной мощности
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14 со стороны источника питания
со стороны источника питания
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[Интент]Параллельные тексты EN-RU
Installation standards require upstream protection.
[LS Industrial Systems]Стандарты требуют, чтобы электроустановки имели защиту со стороны источника питания.
[Перевод Интент]The MCCBs downstream cannot handle this maximum fault current and rely on the opening of the upstream breaker for protection.
[LS Industrial Systems]Автоматические выключатели < в литом корпусе>, расположенные со стороны нагрузки, не рассчитаны на такой максимальный ток короткого замыкания и защитное отключение цепи производится автоматическим выключателем, расположенным со стороны источника питания.
[Перевод Интент]It must be equal to the cross-section of the installation’s upstream cables.
[LS Industrial Systems]Сечение жил должно быть равно сечению жил кабелей электроустановки, расположенных со стороны источника питания.
[Перевод Интент]The optimum arrangement of this system can be organized with upstream breaker's electronic trip unit which can perform short time delay setting.
[LS Industrial Systems]Лучше всего данному требованию удовлетворяет система, в которой расположенный со стороны источника питания автоматический выключатель оснащен электронным расцепителем с кратковременной задержкой срабатывания.
[Перевод Интент]At the instant of closing a switch to energize a capacitor, the current is limited only by the impedance of the network upstream of the capacitor, so that high peak values of current will occur for a brief period, rapidly falling to normal operating values.
[LS Industrial Systems]В момент включения конденсатора ток ограничивается только полным сопротивлением участка цепи, расположенного со стороны источника питания. Ток принимает максимальное значение только в течение очень короткого времени, а затем быстро уменьшается до обычного рабочего значения.
[Перевод Интент]This is an economical approach to the use of circuit breakers, whereby only the main ( upstream) breaker has adequate interrupting capacity for the maximum available fault current.
[LS Industrial Systems]Данное решение обеспечивает наиболее экономичный способ применения автоматических выключателей, поскольку только главный автоматический выключатель ( расположенный со стороны источника питания) должен иметь отключающую способность, соответствующую максимально возможному току короткого замыкания.
[Перевод Интент]Тематики
- выключатель автоматический
- электротехника, основные понятия
EN
Русско-английский словарь нормативно-технической терминологии > со стороны источника питания
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15 обладать
. иметь•These types of lavae are of high viscosity.
•The observer is equipped (or provided) with a device that makes it possible to...
•This material is abrasion resistant ( обладает высоким сопротивлением истиранию).
•These refractories do not exhibit acidic or basic properties.
•The automatic press embodies (or has, or includes, or incorporates) all the regular features of the semi-automatic press.
•The capacitor features extraordinary stability.
•The corrugation offers an enlarged area and so increases total heat transfer from...
•These alloys possess good tensile strength.
•Carbon-fibre materials offer nearly all the attractive features of glass-fibre materials.
•The adrenals show remarkable similarity of structure.
•This type of capacitor affords greater capacity for a given volume.
Русско-английский научно-технический словарь переводчика > обладать
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16 закорачивать
•This capacitor is shorted out by a relay.
•This action closes contacts which short out the amplifier input stages.
•Such batteries can be short circuited without injury.
* * *Закорачивать (электрически)The capacitor acts as a short on the secondary winding.Русско-английский научно-технический словарь переводчика > закорачивать
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17 электрическое напряжение, приложенное к
Универсальный русско-английский словарь > электрическое напряжение, приложенное к
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18 конденсатор образует кажущийся разрыв в цепи постоянного тока
Универсальный русско-английский словарь > конденсатор образует кажущийся разрыв в цепи постоянного тока
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19 в то время как
•As the capacitor charges, the grid and cathode voltages of the output tube rise simultaneously with respect to earth.
II•Whereas (or While) pillow lavas dominate the Middle Atlantic rift floor, smooth-faced sheet lavas are extensive in the Eastern Pacific rift floors.
•Whereas there is just one kind of electric charge, there are three kinds of colour charge.
•Meridional rays have the same transit times, whereas transit times for skew rays depend on...
* * *В то время как-- Another special feature of the flange design was the capability of rotating the upstream tube about its own axis while the downstream tube remained stationary.Русско-английский научно-технический словарь переводчика > в то время как
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20 включённый
•Control of the welding current is by a trip-switch connected in the primary circuit of...
•The capacitor connected into the second stage of the amplifier...
•A relay included in the lamp circuit...
•High-value resistors incorporated in the grid connections...
II•The circuit in the "on" condition...
•The chart-drive motor which is on when the switch toggle is in the down position...
* * *Русско-английский научно-технический словарь переводчика > включённый
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