1. Scope Section A - Transformers for Luminous-Tube Signs A1.1 This section applies to transformers for luminous-tube signs of portable and stationary types, for potentials up to and includ ing 600 volts low-potential, and l5,000 volts open-circuit

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This document provides guidance in the application of dissolved gas analysis (DGA) to transformers and reactors subjected to factory temperature rise tests. This document consists of evaluation procedures and guidelines for acceptable levels of gases generated in conventional mineral oil-fi lled transformers and reactors during factory temperature rise tests.

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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

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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

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The scope of this standard is the definition and specification of the functional requirements and test code for dry-type and oil-immersed smoothing reactors and dry-type converter reactors for high-voltage direct current (HVDC) power transmission. This standard only applies to smoothing reactors for dc transmission and converter reactors for dc transmission located at the converter arms.

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1. Scope 1.1 This part of IEC 79 specifies the requirements for the construction and testing of oil-immersed electrical apparatus, oil-immersed parts of electrical apparatus and Ex components in the type of protection "o", intended for use in potential

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