Dasgupta I. Power Transformers: Quality Assurance

New Age International (P) Ltd., Publishers, 2009. — 616 p. — ISBN: 8122424007Силовые трансформаторы: Проверка качества. With the view to attain higher reliability in power system operation, the quality assurance in the field of distribution and power transformers has claimed growing attention. Besides new developments in the material technology and manufacturing processes of transformers, regular diagnostic testing and maintenance of any engineering product may be ascertained by ensuring: * right selection of materials and components and their quality checks. * application of correct manufacturing processes any systems engineering. * the user`s awareness towards preventive maintenance. The successful performance of the product can only be assured once these three independent functioning authorities join hands together for the common cause i.e., `QUALITY ASSURANCE`. Without this tie up we cannot expect uniform quality with satisfactory performance and longer life span of the products. With a view to create, distribute and speed the message of quality with an objective of making `Made in India` level a symbol of quality in The world market, responsibility of each functionaries need to be identified. Keeping the above in mind the contents of the book is divided in five sections.Working Principles of Transformers
Elementary Engineering of Transformer Operation
Classification of Materials
CRGO Silicon Steel
Winding Wires and Strips
Insulating Pressboard
Insulating Oil
Transformer Tank Body and Radiators
Porcelain Bushing and Fitting, Off-Circuit Ratio Switch and Gaskets
Process Control—A Part of Quality Assurance
Role of Machine
Purchase Procedure and Checks on Incoming Materials for Quality Assurance
Various Manufacturing Processes
Special Process
Design Process
Inprocess Inspection and Quality Checks
Allowable Working Tolerances
Test and Inspection on Finished Products
Control of Non-conforming Products, their Review and Disposal
Job Progress Card
Condition Monitoring
Calibration Status
Customer Complaints and Feedback
Use of Reference Standards
Training
Statistical Technique
Basic Concept of ISO : 9000
Benchmarking and Process Improvement
Key Notes on Preventive Maintenance
Installation, Erection and Commissioning
Schedule of Maintenance and Proposed Corrective Action
Transformer Repair at Site
Life of a Transformer—User’s Guide
Failure Analysis of Transformers During Short Circuit Test—A Case Study
Loading Guide for Oil-Immersed Transformer
Protection on Distribution Transformers
Abstract of the Quality Assurance of Distribution Transformers
Calculations of Various Performance Parameters
Scope of Inspection and Quality Assurance
Role of the Quality Assurance Engineer
Thoughts for Progress