J & P Transformer Book : a practical technology of the power transformer
- 11th
- London Butterworths 1983
- 815
The J&P Transformer Book, 11th Edition deals with the design, installation, and maintenance of transformers. The book contains technical information, tables, calculations, diagrams, and illustrations based on information supplied by transformer manufacturers and related industries. It reviews fundamental transformer principles, the magnetic circuit, the characteristics of, and general types of transformers. The text contains tables showing the information that should be given to the transformer manufacturer to be used as a basis in preparing quotations. Transformer designs include three important distinct circuits to minimize losses: the electric, the magnetic, and the dielectric circuits. The book emphasizes that the maximum efficiency of any transformer occurs at the load at which the iron loss equals the copper loss. The text also discusses how the maximum overall operating economy of transformer substations, especially those with several transformers operating in parallel, can be effected by reducing the total transformation losses to a minimum under all loading conditions. The book is an essential reference for architects, system planners, or electrical engineers concerned with design, installation, and maintenance of transformers. It can also prove useful for electrical engineering students.
Contents
1 Fundamental Transformer Principles
2 The Magnetic Circuit
3 General Types and Characteristics
4 Transformer Inquiries and Tenders
5 Transformer Efficiencies
6 The effect of Load Factor Upon the Value of Transformer Losses
7 Polyphase Connections
8 The Scott and the Le Blanc Connections
9 The Interconnected Star and the Open Delta Connections
10 Multi-Winding Transformers: Including Tertiary Windings
11 Transformer Tappings
12 Voltage Variation by Tap Changing
13 Performance and Type Tests
14 Phasor Representation of Transformer Test Conditions
15 Impulse Testing of Transformers
16 Dispatch, Installation, and Maintenance of Oil Immersed Transformers, Including Drying Out on Site
17 Transformer Oil
18 Parallel Operation
19 The Minimum Total Loss Loading of Substation Transformers Operating in Parallel
20 Neutral Point Earthing
21 The Three-Phase, Interconnected Star Neutral Earthing Transformer and Static Balancer
22 Transient Phenomena Occurring in Transformers
23 Transformer Protection
24 Failures and their Causes
25 Effects of Sustained Abnormal Operating Conditions
26 The Influence of Transformer Connections Upon Third-Harmonic Voltages and Currents