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- W3023823090 abstract "This chapter discusses electrical characteristics of ideal transformers. An ideal transformer is a device for multiplying voltage and dividing current by factors of n, leaving real and reactive power flow unchanged. An impedance Z, arising from the imperfect coupling between primary and secondary, appears in series with the primary circuit and modifies the properties of a real transformer. Most power transformers incorporate a device known as an “on-load tap-changer” which enables adjustment of the ratio n, typically between 0.85 and 1.15 times the nominal value. Alteration of transformer ratios has little or no influence on the flow of real power but enables the voltage to be regulated as desired. A transformer connected between two large subsystems, each of substantially constant voltage, has the interesting property that alteration of the ratio causes an interchange of reactive power in either direction independently of the flow of real power. The power rating of a transformer is based on the maximum permissible temperature rise with forced cooling. The conductor cross section is usually so adjusted that the economic optimum peak load is about the same as or slightly higher than the thermally limited rating." @default.
- W3023823090 created "2020-05-13" @default.
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- W3023823090 date "1972-01-01" @default.
- W3023823090 modified "2023-09-26" @default.
- W3023823090 title "TRANSFORMERS" @default.
- W3023823090 doi "https://doi.org/10.1016/b978-0-08-016696-4.50012-9" @default.
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