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HPE Intelligent Power Distribution Unit (PDU)
HPE Intelligent Power Distribution Unit (PDU)

UNDERSTANDING HPS BALLASTS
UNDERSTANDING HPS BALLASTS

... "WATCON", solid state controlled, etc. not to mention lag and lead which gets all mixed up in other terminology pertaining to power factor; set these aside for now. Ballast circuits can be classified by their level of sophistication and performance, each with a different set of advantages to fit dif ...
Design-Oriented Estimation of Thermal Noise in Switched
Design-Oriented Estimation of Thermal Noise in Switched

IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)

... Loss and dispersion are the major factor that affect fiber-optical communication being the highcapacity develops. The EDFA is the gigantic change happened in the fiber-optical communication system; the loss is no longer the major factor to restrict the fiber-optical transmission. Since EDFA works in ...
HARDWARE MANUAL
HARDWARE MANUAL

Ladda PDF Lärdomsprov som heltext
Ladda PDF Lärdomsprov som heltext

... changing control function block that could be implemented and it would be possible for Wärtsilä to start using this function instead of manual control. Wärtsilä synchronous generators have brushless excitation systems that are controlled by an AVR Unitrol 1000-15 or Unitrol 1020. Unitrol keeps the g ...
Chapter 1.0  Introduction to Antennas
Chapter 1.0 Introduction to Antennas

... while an antenna with a wide main beam will have a lower directivity. We might therefore expect a direct relation between these two quantities, but in fact there is no exact relationship between beamwidth and directivity. This is because beamwidth is only a function of the main beam shape, while dir ...
SIGMA S6000 IO/P Module User’s Manual
SIGMA S6000 IO/P Module User’s Manual

... a ship installation the hull is the “ground”. Connecting any of the COM connections on any of the modules within a SIGMA system to ground (hull) or switchboard chassis may cause instability within the system. One, and only one, COM connection should to be made between SIGMA modules. This is preferab ...
L.M. Lorilla, T.A. Keim, J.H. Lang, and D.J. Perreault, “Topologies for Future Automotive Generators – Part I: Modeling and Analytics,” 2005 IEEE Vehicle Power and Propulsion Conference, October 2005, pp. 819-830.
L.M. Lorilla, T.A. Keim, J.H. Lang, and D.J. Perreault, “Topologies for Future Automotive Generators – Part I: Modeling and Analytics,” 2005 IEEE Vehicle Power and Propulsion Conference, October 2005, pp. 819-830.

... Research has previously been done on all four alternators. The rotor construction of the wound field nonsalient pole synchronous alternator is more robust than the salient pole version because its field windings are located in the rotor slots. It can therefore be run at higher speeds than the salien ...
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NIST Measurement Service for DC Standard Resistors

... effect in which a resistance is related to the ratio of fund amental constants h/e2 [1,2]. The quantized Hall resistance, RH, is defined as the quotient of the Hall voltage VH of the ith plateau to the current I in the Hall device and is given by RH(i) = VH(i)/I = RK/i, where the von Klitzing consta ...
assessment of dielectric properties of epoxy resin
assessment of dielectric properties of epoxy resin

Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier SSM2375
Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier SSM2375

... (ultralow EMI emissions mode) that significantly reduces the radiated emissions at the Class-D outputs, particularly above 100 MHz. In ultralow EMI emissions mode, the SSM2375 can pass FCC Class B radiated emission testing with 50 cm, unshielded speaker cable without any external filtering. The devi ...
ERG(X)
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... Hot-spot Temperature (for Reference) The temperature of the resistor body increases with the curve below. A touching vinyl wire may cause damages to resistor element. Do not place vinyl wires around resistors and be sure to consider where the resistors will be ...
system> eg SENTRON
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STK392-110
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... When the IC supply voltage, VCC, is ±32 V and RL is 6 Ω, the IC internal power dissipation, Pd, will be a maximum of 72 W for a continuous sine wave signal at 1 kHz, according to the Pd – PO characteristics. For the music signals normally handled by audio amplifiers, a value of 1/8 PO max is general ...
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UltraVolt, Inc. - Application Notes for High Voltage Power Supplies

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... machine. Thus, adequate frequency and voltage control is achieved in a microgrid involving distributed generation (DG), without the need of a communication-system. In grid-connected microgrids, DG units mainly perform active-power supply and voltage regulation, whereas the system frequency is mainly ...
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... Collector Bus means the low voltage side of the transmission systems step-up transformer which is the same as the medium voltage network or aggregate of medium voltage networks that connect to the low-voltage side of the transmission system transformer. The energy produced by WTGs is collected on th ...
Teaching Measurement Uncertainty to Undergraduate
Teaching Measurement Uncertainty to Undergraduate

... All the possible values have the same probability. Typical situations for using this distribution are, among others, digital resolution, component tolerances, quantization error or RF phase angle [13]. In a more general way, a rectangular distribution should be used when only the two limits of possi ...
3.2 List of Faults and Alarms
3.2 List of Faults and Alarms

... Set the monitoring time higher at the PC or, if required, completely disable the monitoring function. For the commissioning software, the monitoring time is set as follows: -> Commissioning -> Control panel -> Button "Fetch master control" -> A window is displayed to set the monitoring time ...
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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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