01112nam--2200337---450 99000274518020331620230515150641.0000274518USA01000274518(ALEPH)000274518USA0100027451820060601h2001----km-y0itay50------baitaITa|||b|||001yyDa Canaletto a Constablevedute di città e di campagna dallo Yale Center for British Arta cura di Cynthia E. RomanFerraraFerrara arte2001198 p.ill.30 cmCatalogo della mostra tenuta a Ferrara nel Palazzo dei Diamanti nel 2001Paesaggio nella pittura ingleseSec. 18.-19.Esposizioni2001EsposizioniFerrara2001758.10942ROMAN,Cynthia E.Yale center for British art <New Haven>ITsalbcISBD990002745180203316XII.2.B. 1110189315 L.M.XII.2.00125128BKUMADa Canaletto a Constable146229UNISA02233nam 2200373 450 991013576990332120231206190633.00-7381-0863-410.1109/IEEESTD.1986.82562(CKB)3780000000089300(NjHacI)993780000000089300(EXLCZ)99378000000008930020231206d1986 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierANSI/IEEE Std C57.12.56-1986 IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers /Institute of Electrical and Electronics EngineersNew York, New York :IEEE,1986.1 online resource (20 pages)This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. A test procedure for determining the temperature classification of ventilated dry-type power and distribution transformer insulation systems by test rather than by chemical composition is established. The intent is to provide a uniform method for providing data for selection of the temperature classification of the insulation system, for providing data that may be used as a basis for a loading guide, and for comparative evaluation of different insulation systems. Voltage-withstand endpoint criteria are related to the impulse voltage distribution within the coil or to the initial voltage-withstand of the coil. A relationship between impulse withstand of the insulation and short-term 60-Hz-withstand is identified so that 50/60--Hz testing of model coils is possible.ANSI/IEEE Std C57.12.56-1986: IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution TransformersElectric switchgearStandardsStandards, EngineeringElectric switchgearStandards.Standards, Engineering.621.317NjHacINjHaclDOCUMENT9910135769903321ANSI2072434UNINA