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Transformer Polarity
Transformer Polarity

... or adjacent to, the H1 and X1 terminals of PT’s and CT’s. Sometimes alternate marking, in the form of a square dot, slash mark ( / ), or plus/minus sign ( + ) will be used to identify the polarity terminals on electrical drawings. Instrument transformers may also have the terminals identified with p ...
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... abnormal sound during normal running and no overheating. Greasing is not necessary for generators using the double seal type ball bearings, but these will need to be replaced after every 10,000 hours of operation (see PARTS REPLACEMENT METHOD). INSULATION RESISTANCE MEASUREMENT If the generator has ...
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MJ21193 数据资料DataSheet下载

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... voltage with aconstant root mean square (rms) value to continue the production. To satisfy these demands, the disturbances must be eliminated from the system. If these problems occur continuously then it causes the severe effect on the power system such as failure of the equipment, shut down of powe ...
Power Diodes - Dr. Imtiaz Hussain
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Triode



A triode is an electronic amplifying vacuum tube (or valve in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode). Invented in 1906 by Lee De Forest by adding a grid to the Fleming valve, the triode was the first electronic amplification device and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention founded the electronics age, making possible amplified radio technology and long-distance telephony. Triodes were widely used in consumer electronics devices such as radios and televisions until the 1970s, when transistors replaced them. Today, their main remaining use is in high-power RF amplifiers in radio transmitters and industrial RF heating devices. The word is derived from the Greek τρίοδος, tríodos, from tri- (three) and hodós (road, way), originally meaning the place where three roads meet.
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