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AEMC Ground Resistance Testers
AEMC Ground Resistance Testers

... • Monitor demand at 15 minute or user-defined averaging periods • Verify efficiency improvements with energy consumption tests • Measure harmonic distortion caused by electronic loads • Capture voltage dips and swells from load switching • Easily confirm instrument setup with color display of wavefo ...
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700-HP : UltraHigh-Power Subwoofer

... Performance specifications for a typical production unit shall be as follows, measured at 1/3-octave resolution: Operating frequency range shall be 28 Hz to 150 Hz. Phase response shall be ±30° from 45 Hz to 145 Hz. Maximum peak SPL shall be 139 dB at 1 meter. The internal power supply shall perform ...
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QUICKTRONIC PROStar T5 Programmed Rapid Start System XLBF
QUICKTRONIC PROStar T5 Programmed Rapid Start System XLBF

... a patented circuitry designed to shut down the system reliably and safely when lamps reach end-of-life. QUICKTRONIC PROStart T5 UNV Systems are available as a two lamp model which can be wired for one lamp operation to cover a wide range of applications. Setting the standard for quality, QUICKTRONIC ...
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... required and can, therefore, have an influence on the size and cost of the tunnel in which the accelerator is installed. All RF power amplifiers for high-power hadron accelerators employ vacuum tube technology. Vacuum tubes use d.c., or pulsed, voltages from several kilovolts to hundreds of megavolt ...
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... for 3 phase AC induction motor systems. The unit is a phase angle, current sensing and voltage sensing relay, that can automatically set up trip points within specified limits around the normal operating conditions of a particular motor system. An adjustable restart timer, triggered by an underload ...
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Switching of capacitor banks using a SynchroTeq

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... The processor portion of the TA0103A is operated from a 5-volt supply (between V5 and AGND). In the generation of the complementary modulation pattern for the output MOSFETs, the processor inserts a “break-before-make” dead time between when it turns one transistor off and it turns the other one on ...
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Alternating current



Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.AC is the form in which electric power is delivered to businesses and residences. The usual waveform of alternating current in most electric power circuits is a sine wave. In certain applications, different waveforms are used, such as triangular or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information encoded (or modulated) onto the AC signal, such as sound (audio) or images (video).
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