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When fully charged the 2.0 mF capacitor used as a backup
When fully charged the 2.0 mF capacitor used as a backup

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Earth fault distance computation with fundamental frequency

investigation of techniques for reducing unintentional
investigation of techniques for reducing unintentional

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ADM8690/ADM8691/ADM8695 (Rev. C)

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... values of ω that are much higher or much lower than the resonant frequency, the term in parentheses becomes very large and cosδ approaches zero. (b) False. When the resonance curve is reasonably narrow, the Q factor can be approximated by Q = ω 0 Δω . Hence a large value for Q corresponds to a narro ...
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... buffers with 3-STATE outputs and is intended for bus oriented applications. The device is byte controlled. Each byte has separate 3-STATE control inputs which can be shorted together for full 16-bit operation. The T/R inputs determine the direction of data flow through the device. The OE inputs disa ...
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A NINE-SWITCH UPQC WITH VARIABLE-BAND HYSTERESIS CONTROL

... quality conditioner (UPQC). It is presented as a flexible and effective solution for current and voltage related problems of the DG system by enhancing PQ. Maintaining similar power rating compared to the conventional UPQC, the nine-switch UPQC functions during normal, sag and swell operation while ...
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Electron Field Emission from Silicon Emitter Arrays

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... This thesis is done in cooperation with E Avenue Oy. The idea of this project came from the fact that several times there have appeared problems with short-circuit current sustainability regulations for low voltage switchgears. The company is missing clear guidelines for “short-circuit current ratin ...
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Lessons In Electric Circuits, Volume VI -- Experiments

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TRIAC



TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.
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