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[null,"1.","Record Nr.",null,"UNINA9910135769503321"]
[null,null,"Titolo",null,"ANSI/IEEE Std C57.12.90-1987 : IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers / / Institute of Electrical and Electronics Engineers"]
[null,null,"Pubbl/distr/stampa",null,"New York, New York : , : IEEE, , 1988"]
[null,null,"ISBN",null,"0-7381-4297-2"]
[null,null,"Descrizione fisica",null,"1 online resource (80 pages)"]
[null,null,"Disciplina",null,"621.31922"]
[null,null,"Soggetti",null,"Electric transformers - Testing"]
[{"$nulls":4},"Short circuits"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Sommario/riassunto","Superseded by C57.12.90-1987. Methods for performing tests specified in IEEE Std C57.12.00-1993, IEEE Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers, and other standards applicable to liquid-immersed distribution, power, and regulating transformers are described. Instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, grounding transformers, and mine transformers are excluded. This standard covers resistance measurement, polarity and phase-relation tests, ratio tests, no-load-loss and excitation current measurements, impedance and loadloss measurements, dielectric tests, temperature tests, short-circuit tests, and audible-sound-level measurements."]