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242 - QSL.net
242 - QSL.net

Electrical Power Technology Using Data
Electrical Power Technology Using Data

... Each symbol is a functional representation of a device used in Electrical Power Technology. The use of these symbols greatly simplifies the circuit diagrams by reducing the number of interconnections shown, and makes it easier to understand circuit operation. The exercises in the two student manuals ...
Courseware Sample Electric Power/Controls Electrical Power Technology
Courseware Sample Electric Power/Controls Electrical Power Technology

... Each symbol is a functional representation of a device used in Electrical Power Technology. The use of these symbols greatly simplifies the circuit diagrams by reducing the number of interconnections shown, and makes it easier to understand circuit operation. The exercises in the two student manuals ...
Parameters related to voltage issues - entso-e
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Improved Power Quality AC/DC Converters

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... AN2950 Application note EVLVIPER28L-10W: 5 V/10 W, 60 kHz isolated flyback with extra power management Introduction This document describes a 5 V, 2 A application with 3.3 A peak current capability of 1.9 sec, using VIPer28, a new offline high-voltage converter from STMicroelectronics. In some appli ...
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... proven over a period of some fifteen years, with constant refinement. The backbone of the AD8306 (Figure 19) comprises a chain of six main amplifier/limiter stages, each having a gain of 12.04 dB (×4) and small-signal –3 dB bandwidth of 850 MHz. The input interface at INHI and INLO (Pins 4 and 5) is ...
A Draft Standard Glossary of Power Quality - Working Group
A Draft Standard Glossary of Power Quality - Working Group

WT 1600 Total Solution Numerical, Waveform, and Trend Displays
WT 1600 Total Solution Numerical, Waveform, and Trend Displays

... Current and power DC accuracy (5 A input element) -----Add 20 µA to current and 20 µA × (voltage reading) to power Current and power DC accuracy (50 A input element) -----Add 1 mA to current and 1 mA × (voltage reading) to power External input -----Add (0.05/scaling value) A to current and (0.05/sca ...
Methods for detecting ground faults in medium-voltage
Methods for detecting ground faults in medium-voltage

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... [11]-[12], while the output is an inverter. Their key advantage is that no additional circuit is needed. However, those control methods cannot be applied to systems with front-end diode-bridge rectifier. Apart from requiring a sophisticated controller, some of them also rely on specific relationshi ...
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An Optimal Power Supply And Body Bias Voltage

... using a real micro-controller chip. Our target is the V850EStar [10] compatible 32-bit micro-controller for signal processing, car electronics, and digital servo motor control. It uses a RISC instruction set enhanced for application; that is, multiplication, saturation calculations, and bit manipula ...
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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
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... converter station blocking. This condition will be ended by the disconnection of the DFIG from the system. If the DFIG contributes in delivering a large portion of power to the grid, financial loss will be uncountable. Most of the studies about the DFIG are concerned about the improvement of its FRT ...
a Complete 8-Bit, 32 MSPS, 95 mW CMOS A/D Converter AD9280
a Complete 8-Bit, 32 MSPS, 95 mW CMOS A/D Converter AD9280

... cycles. The digital output data is presented in straight binary output format. An out-of-range signal (OTR) indicates an overflow condition which can be used with the most significant bit to determine low or high overflow. The AD9280 can operate with a supply range from +2.7 V to +5.5 V, ideally sui ...
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Decibel

The decibel (dB) is a logarithmic unit that expresses the ratio of two values of a physical quantity, often power or intensity. One of these quantities is often a reference value and in this case the decibel expresses the absolute level of the physical quantity. The number of decibels is ten times the logarithm to base 10 of the ratio of two power quantities, or of the ratio of the squares of two field amplitude quantities. One decibel is one tenth of one bel, named in honor of Alexander Graham Bell; however, the bel is seldom used.The definition of the decibel is based on the measurement of power in telephony of the early 20th century in the Bell System in the United States. Today, the unit is used for a wide variety of measurements in science and engineering, most prominently in acoustics, electronics, and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel confers a number of advantages, such as the ability to conveniently represent very large or small numbers, and the ability to carry out multiplication of ratios by simple addition and subtraction. By contrast, use of the decibel complicates operations of addition and subtraction.A change in power by a factor of 10 is a 10 dB change. At the half power point an audio circuit or an antenna exhibits an attenuation of 3dB. A change in voltage by a factor of 10 results in a change in power by a factor of 100, which is a 20 dB change. A change in voltage ratio by a factor of two approximately corresponds to a 6 dB change.The decibel symbol is often qualified with a suffix that indicates the reference quantity that has been used or some other property of the quantity being measured. For example, dBm indicates a reference power of one milliwatt, while dBu is referenced to approximately 0.775 volts RMS.In the International System of Quantities, the decibel is defined as a unit of measurement for quantities of type level or level difference, which are defined as the logarithm of the ratio of power- or field-type quantities.
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