定价： 263元

定价： 263元

This document provides a guide for developing mathematical models and test procedures to determine the steady state maximum (hottest spot) and average winding temperature rise over ambient for liquid immersed distribution, power, network, and regulating transformers manufactured in accordance with IEEE C57.12.00.

定价： 76元 / 折扣价： 65 元

This guide covers general recommendations for loading mineral-oil immersed power transformers manufactured in accordance with IEEE C57.12.00-1987 Ill' and having a maximum nameplate rating in excess of 100 phase). Such transformers have an average winding rise of 65 "C maximum and a hottest spot rise of 80 "C maximum at rated load.

定价： 84元 / 折扣价： 72 元

This guide covers general recommendations for loading mineral-oil-immersed power transformers manufactured in accordance with ANSI/IEEE C57.12.00-1980 [lP and having a maximum nameplate rating in excess of 100 MVA (three phase) or 33+ MVA (single phase). Such transformers have an average winding rise of 65 DC maximum and a hottestipot rise of 80 DC maximum at rated load. NOTE: When this guide is to be used for transformers purchased prior to publication of the guide, the applicability of 2.5… read more and 4.3 should be checked with the manufacturer. Also see Appendix D read less

定价： 65元 / 折扣价： 56 元

This guide covers general recommendations for lading mineral-oil power transformers, manufactured in accordance with ANSI C57.12.10-1976 and ANSI C57.12.30-1977 and other oil-insulated power transformers up to and including 100 MVA maximum nameplate rating. It is based mostly on aging of the winding insulation. Loading of transformers larger that 100 MVA may be limited by factors other than insulation aging such as stray flux, etc. When it is known that such limitations do not exist and… read more insulation aging rather that oil temperature, gassing, tank heating, etc is the controlling factor, this guide may be used. This guide may also be used for askarel filled transformers. read less

定价： 55元 / 折扣价： 47 元