Power transformers – Part 5: Ability to withstand short circuit (original) (raw)
Power transformers -Specification -Part 5: Ability to withstand short circuit
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and Industry established, under Cap 327 of the Laws of Uganda. UNBS is mandated to coordinate the elaboration of standards and is (a) a member of International Organisation for Standardisation (ISO) and (b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and (c) the National Enquiry Point on TBT/SPS Agreements of the World Trade Organisation (WTO). The work of preparing Uganda Standards is carried out through Technical Committees. A Technical Committee is established to deliberate on standards in a given field or area and consists of representatives of consumers, traders, academicians, manufacturers, government and other stakeholders. Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the general public for comments. The committee reviews the comments before recommending the draft standards for approval and declaration as Uganda Standards by the National Standards Council.
A comparison of IEC 76 and ANSI C57.12 on transformers
2003
There is a growing need to look out into new markets outside of USA, which requires proper understanding of the international standards. In the field of transformers, which are vital links in power delivery, the major international standard is IEC 76. In this paper, a brief comparison of major parameters like service conditions, categories, impedance, temperature rises, tolerance, dielectric insulation levels, test requirements etc of transformers in IEC 76 and IEEE/ANSI C57, have been brought out. An attempt is made in this paper to have a quick understanding of important technical parameters of transformers per IEC 76, in comparison with IEEE/ANSI C 57. Clause numbers in both specifications are mentioned against the parameters for easy reference for the readers. Because of the volume of the standards and details included in individual sections, it is difficult to cover a detailed comparison in a technical paper. Only major parameters which are commonly encountered in inquiry, order, manufacturing, and of testing of power transformers are covered in this paper. In order to bring out direct comparison, the rest of the entire paper is presented in tabular form. Wherever necessary, separate details have been provided for drytype and oil-filled transformers.
A Comparative Study of IEC 76 and ANSI C57.12 on Transformers
This paper presents a brief comparison of major parameters like service conditions, categories, impedance, temperature rises, tolerance, dielectric insulation levels, test requirements etc of transformers in IEC 76 and IEEE/ANSI C57.The understanding of IEC 76 is important for the transformer market outside USA as most of the new market are looking for transformers conforming to IEC specification. An attempt is made in this paper to have a quick understanding of important technical parameters of transformers per IEC 76, in comparison with IEEE/ANSI C57. Clause numbers in both specifications are mentioned against the parameters for easy reference for the readers. Because of the volume of the standards and details included in individual sections, it is difficult to cover a detailed comparison in a technical paper. Only major parameters which are commonly encountered in inquiry, order, manufacturing, and of testing of power transformers are covered in this paper.
IEEE Standard Terminology for Power and Distribution Transformers
This standard is a compilation of terminology and definitions primarily related to electrical transformers and associated apparatus included within the scope of C57, Transformers, Regulators, and Reactors standards. It also includes similar data relating to power systems and insulation, which is commonly involved in transformer technology.
Investigation of greatness that impact on power transformer useful life
Journal of Innovative Technology and Education, 2016
In this paper it is illustrated a scenario of power generation systems and their main concerns. It presents the regulation IEC 61850 and talks about the importance of management in managing assets by providing dealerships energy services. Introduces comments on power transformers and investigates the major dimensions that impact on the life of these power devices.
Electricity, 2021
Low-power instrument transformers (LPITs) are spreading among the distribution network thanks to their features (e.g., compactness, lightness, enhanced bandwidth, etc.). It is then a fundamental to guide users and manufacturers to a correct usage and manufacturing of the LPITs. Technical committees, which are in charge of writing dedicated standards, often tackle such a task. Focusing on the current type of LPITs, the low-power current transformers (LPCTs), the associated standard is the IEC 61869-10, which is going to be improved in 2021. To this purpose, the work aims at providing new inputs for the future version of such a standard. In particular, the focus is pointed towards the effects of the conductor positioning on the window-type LPCT accuracy. Literature and gained experience in the field are the two pillars that have been used to refine the outcomes of the work, which are provided in terms of suggestions for each technical aspect, as discussed in the standard, related to L...