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How Series and Parallel Circuits Differ
How Series and Parallel Circuits Differ

... device) must be wired so that all current flows through it. The ammeter must be an excellent conductor so that no energy is lost due to its addition to the circuit. ...
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... Electric Power quality is a term which has captured increasing attention in power engineering in the recent years, The measure of power quality depends upon the needs of the equipment that is being supplied. The low power factor and high pulsating current from the AC mains are the main disadvantages ...
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attachment=2413

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... • Calculations using I = nAvq assuming each metal atom releases one electron give speeds of a few millimetres per second for normal currents. • Think of a vast sluggish river rather than a fast white-water rafting stream. Both can deliver a similar volume of water per second despite ...
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... network, a sudden voltage dip will occurred on adjacent load feeders. In this kind of situation if a DVR installed on the associated path, then the line voltage is restored within a short period. So the equipment, apparatus and sensitive device will not be affected. This DVR (Dynamic voltage restore ...
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... Motor designers sometimes use the direct model to estimate the power factor. In this model the time of passage by zero is taken directly from curves obtained in simulations. This model should not be used when waveforms are charged of harmonics because a constant phase angle difference is not applica ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.
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