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... medium voltage soft starter as well as for medium voltage power supply applications. For these kinds of applications it is necessary to use several thyristors in series connection. They are optimized to achieve an excellent voltage sharing under all operating conditions. The device is designed for a ...
Field-Circuit Coupling Applied to Inductive Fault Current
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Evaluating Microstrip with Time Domain Reflectometry
Evaluating Microstrip with Time Domain Reflectometry

... used to determine the crosstalk coefficient. Forward crosstalk is normally much smaller than the backward crosstalk on microstrip lines—except for very long lines (>5 feet). Forward crosstalk does not exist at all on strip lines, since they are made with a homogeneous dielectric medium, so that the ...
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... This question was effectively two questions in one. Firstly there was a comparator section which tested candidates' understanding of potential dividers. This was completed to a good standard by the majority who could identify the correct formula to use. Some candidates then failed to obtain the corr ...
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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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