ElectronicDesignNet.com

The world of electronic design solutions

Frequency Devices
List your company in our Buyer's Guide (free)
SOC Central
SOC Central
Fix & Prog. Sinewave Oscillators - Frequency Devices

Register now to update your company and product listings (free)

   Transformers, Autotransformer

An autotransformer is an electrical transformer with only one winding. The winding has at least three electrical connection points called taps. The voltage source is applied to two taps and the load is connected to two taps one of which is usually a common connection that is also connected to the source. Each tap corresponds to a different source or load voltage. In an autotransformer a portion of the same winding effectively acts as part of both the primary and secondary winding.



Bronze Partners
3S Industries, Co., Inc.
AAC Inc
Abbott Technologies, Inc.
AC Transformer
Acme Electric Corporation
Advanced Components Industries, Inc.
Allied Components International
Alpha-Core, Inc.
Altran Corp.
Amecon, Inc.
American Magnetics
American Zettler
Amveco Magnetics Inc
API Delevan Inc.
ATC-Frost Magnetics / Standex Electronics
Avel Lindberg Inc.
Badger Transformer Comp. Inc.
Basler Electric
Bel Fuse Inc.
Beta Transformer Technology Corp.
Bey Electronics Corp.
Bicron Electronics
Bomag USA, LLC
Bridgeport Magnetics/Tortran Inc.
C & C Jetronic
Calrad Electronics
Carson Manufacturing Company, Inc.
CET Technology
Charles Industries, Ltd
Cletronics Inc.
Coast Magnetics
Coil Specialty Company
Coin Electronics.Co.,Ltd
Controlled Power Company
Corona Magnetics, Inc.
Cougar Electronics Corp.
Cramer Coil & Transformer Co., Inc.
CTM Magnetics
Custom Magnetics Inc.
DCA, Inc.
Deltona Transformer Corp.
DeYoung Mfg., Inc.
Dynage/Power & Magnetics
Dynapower Corporation
EAG Electronics
EK Magnetics
Electro Technik Industries
Electrocube, Inc.
Electromech, Inc.
Electronetics
Electronic Specialists Inc.
Endicott Coil Company, Inc.
Ensign Corp.
EPCO Products Inc.
ERA Elektrotechnik GmbH
Forest Electric Company
Freed Transformer Company, Inc.
Gavagan Electronics
GCi Technologies
Gettysburg Transformer Corp.
Glen Magnetics Inc.
Grand Transformer, Inc.
HALO Electronics, Inc.
Hammond Manufacturing Company
Hammond Power Solutions Inc.
Hammond Power Solutions Inc.
Hipotronics Inc.
Hisonic, Inc.
Hitran Corp.
Hughey & Phillips, Inc.
Hytronics Corp.
I-TECH CORP.
Inductive Technologies
International Configurations, Inc.
ISL Products International Limited
Jefferson Electric, Inc.
Jerome Industries Corp.
JM Transformer Company, Inc.
Kaschke U.S.A. Inc.
Keytronics, Inc.
KGS Electronics, Inc.
Kuhlman Electric Corporation
L/C Magnetics
Lenco Electronics, Inc.
Mag-Con Engineering, Inc.
Magnelab
Magnetic Circuit Elements
Magnetic Design Labs
Magnetic Windings Co., Inc.
Magnetico, Inc.
Magnetics & Controls, Inc.
Magnetika, Inc
Magnetran Inc.
Mainstar Industries Limited
Manby Park Westropp Ltd
MCI Transformer Corp.
Metrel
Micron Industries Corporation
Minntronix, Inc
Mitchell Electronics Corp.
MTE Corp.
Multicomp/ZMAN Magnetics
Myers Power Products, Inc.
Neeltran, Inc.
Nicollet Technologies Corp.
Northlake Engineering, Inc.
Pacific Transformer Corp
Para-Line Transformer Company, Inc.
Pass & Seymour
Payton America
PC Transformer Corp.
Peter W Dahl Co Inc
Pico Electronics, Inc.
PLITRON Manufacturing, Inc.
Power Magnetics
Power Paragon
PowerPax UK Limited
Powertronix Corp.
PowerVolt, Inc.
Precision Electronics
Precision Inc
Prem Magnetics, Inc.
Products Unlimited
Pulse Specialty Components
Pulse, A Technitrol Company
Quality Transformer Corp.
Raycom Electronics, Inc.
RCD Components, Inc.
Renco Electronics, Inc.
Rhombus Industries
Robert M. Hadley Company, Inc.
Schott Magnetics
Scientific Conversion, Inc.
Shogyo Int'l Corp.
Sigma Electronics Inc
Signal Transformer
Staco Energy Products Company
Stancor
Standard Magnetic Corp.
Standex Electronics Inc.
STK International
Sum R Transformers
Superior Electric
Tabtronics Incorporated
Tamura Corp of America
Technipower LLC
TECO Corp.
Thordarson Inc.
Thordarson Meissner Incorporated
Todd Systems, Inc.
Toroid Corporation of Maryland
Toroid Technologies, Inc.
Torotel Products Inc.
Tranex Inc
TransERA Electronics Inc.
Transformer Engineering Corp.
Transformer Manufacturers Inc.
Triad Magnetics (formerly Magnetek)
V & F Transformer Corp.
Ventronics, Inc.
Vishay Intertechnology
Vitec Electronics Corp.
Weschler Instruments
Zambre Company, Inc.
ZMAN Magnetics
Fixed and programmable amplifiers - Frequency Devices

 

Books
The 2006-2011 World Outlook for Liquid-Immersed, Single-And Three-Phase Primary Unit and Single Circuit Unit Substation Small Conventional Transformers and Autotransformers with 501 to 2500 KVA

The 2006-2011 World Outlook for Liquid-Immersed, Single-And Three-Phase Primary Unit and Single Circuit Unit Substation Small Conventional Transformers and Autotransformers with 501 to 2500 KVA

Electric Machinery and Transformers (The Oxford Series in Electrical and Computer Engineering)
Bhag S. Guru and Huseyin R. Hiziroglu

Excerpt - page 104: "... direction of the flux produced by each coil. A two-winding transformer, an autotransformer, and an induction motor are examples of magnetically coupled coils ..."
See more references to Transformers, Autotransformer in this book.
J & P Transformer Book, Twelfth Edition
Martin Heathcote

Excerpt - page 22: "... flow of single-phase currents. More will be said about interconnected-star transformers in Section 7 of Chapter ... Section 2 of Chapter 6. Autotransformers It is possible and in some circumstances economically advantageous for ..."
See more references to Transformers, Autotransformer in this book.
Transformers and Motors
George Shultz

Excerpt - page 22: "... Impedance is usually given as an ohmic value. 19. A transformer is rated for a 50-ampere ... current? 23. How can an autotransformer be distinguished from other types of transformers? 24. An autotransformer ..."
See more references to Transformers, Autotransformer in this book.
Handbook of Transformer Design and Applications
William M. Flanagan

Excerpt - page 41: "... often necessary to apply a high external voltage between a transformer winding and ground or another ... transformer that is not an autotransformer is an isolation transformer, but in this context the term ..."
See more references to Transformers, Autotransformer in this book.
Energy Efficient Transformers
Barry W. Kennedy

Excerpt - page 23: "... tertiary winding is built to suppress third harmonics in shell-form transformers and to provide station service for the substation. They are usually three-phase transformers. In an autotransformer, a single winding provides both the primary and secondary windings, ..."
See more references to Transformers, Autotransformer in this book.
Transformer Engineering (Power Engineering, 25)
S.V. Kulkarni and S.A. Khaparde

Excerpt - page 7: "... to various auxiliary equipment in the generating station. c. Station transformers: These transformers are required to ... Interconnecting transformers: These are normally autotransformers used to interconnect two grids / systems operating at two ..."
See more references to Transformers, Autotransformer in this book.
Electric Power Transformer Engineering
James H. Harlow

Excerpt - page 16: "... neutral can significantly reduce the cost of larger units and autotransformers compared with a fully rated neutral. 2.1.2.3 Cooling Classes Since no transformer is truly an "ideal" transformer, each will incur a certain ..."
See more references to Transformers, Autotransformer in this book.
Transformers
Kennth L. Gebert and Kenneth R. Edwards

Electricity 3: Power Generation and Delivery
Walter N. Alerich and Jeff Keljik

Excerpt - page 138: "... rated load is removed. What is the regulation of the transformer? % regulation = ( 22202201 x 100 = .036 x 100 = 3.6% AUTOTRANSFORMER Transformers having only one winding are called autotransformers. In an ..."
See more references to Transformers, Autotransformer in this book.
Newnes Electrical Power Engineer's Handbook, Second Edition
D F Warne

Excerpt - page 146: "... between primary and secondary voltages. The common connections for three-phase transformers are shown in Fig 6.11. In many transmission transformers, an autotransformer connection is employed. The connection is shown in Fig. 6.12, ..."
See more references to Transformers, Autotransformer in this book.
Electric Utility Systems and Practices
Homer M. Rustebakke

Excerpt - page 147: "... CORES with load tap-changing equipment. It is used on transformers and autotransformers for transmission tie, for bulk distribution units, and at other ..."
See more references to Transformers, Autotransformer in this book.
Electrical Power Equipment Maintenance and Testing (Power Engineering, 4)
Paul Gill

Excerpt - page 95: "... tests of the bushing and the solid winding together. On transformers with condenser type bushings, the ... 2. Three winding transformers 3. Autotransformers 4. Instrument transformers When performing PF tests on transformers, these ..."
See more references to Transformers, Autotransformer in this book.
Interior Lighting, Fourth Edition
Gary Gordon

Excerpt - page 142: "... low-voltage current, with only a 5 percent power loss. A transformer has two coils of wire; ... induced by the transformer. An autotransformer is simply a variable transformer : the primary coil remains ..."
See more references to Transformers, Autotransformer in this book.
Electric Power Distribution Handbook (Electric Power Engineering Series)
Thomas Allen Short

Excerpt - page 159: "... converts electric power from one voltage level to another. A transformer is two sets of coils coupled together through a mag- netic field. The magnetic field transfers all of the energy (except in an autotransformer). In an ideal transformer, the voltages on the input and ..."
See more references to Transformers, Autotransformer in this book.
Fundamentals of Physics, Part 3 (Chapters 21-32)
David Halliday, Robert Resnick, and Jearl Walker

Excerpt - Index: "... 182 Townshend, Pete, 456 tracers, 370, 370-371 trajectory, 67, 67 transformer oil dielectric properties, 669t transformers autotransformer, 858 energy transmission requirements, 849 ideal, 849-851 impedance matching, 851 ..."
See more references to Transformers, Autotransformer in this book.
Schaum's Outline of Basic Circuit Analysis
John O'Malley

Excerpt - page 375: "... the winding currents of a fully loaded 277/120-V, 50-kVA two-winding transformer and an autotransformer with the same rating. The high-voltage winding of the conventional ..."
See more references to Transformers, Autotransformer in this book.
Audel Electric Motors
Rex Miller and Mark Richard Miller

Excerpt - page 194: "... VOLTAGE VOLTAGE VOLTAGE SIDE SIDE SIDE LOW- VOLTAGE SIDE POWER TRANSFORMER AUTOTRANSFORMER Figure 8-20 Comparison of the copper requirements of a single- ..."
See more references to Transformers, Autotransformer in this book.
Electric Machinery
A. E. Fitzgerald, Jr., Charles Kingsley, Stephen D. Umans, and Stephen Umans

Excerpt - page 82: "... to both the primary and secondary circuits. This type of transformer is called an autotransformer. It is little more than a normal transformer connected in ..."
See more references to Transformers, Autotransformer in this book.
Power System Stability and Control
Prabha Kundur

Excerpt - page 232: "... 6 (see Chapter 11). As compared to the conventional two-winding transformer, the autotransformer has advantages of lower cost, higher efficiency, and better regulation. ..."
See more references to Transformers, Autotransformer in this book.
JBL Audio Engineering for Sound Reinforcement
John Eargle and Chris Foreman

Excerpt - page 39: "... O 4 S2 O Figure 3-11: A typical line-to-loudspeaker distribution transformer. THE AUTOTRANSFORMER A. Schematic B. Typical Application Z ZJ2 Z/4 ZJ8 ommon ..."
See more references to Transformers, Autotransformer in this book.
Audel Electrical Course for Apprentices and Journeymen, All New Fourth Edition
Paul Rosenberg

Excerpt - page 303: "... low-voltage winding are electrically isolated. Thus, they are termed isolation transformers. Figure 28-1 illustrates the type ... for this particular transformer. An autotransformer of the same capacity and voltage is illustrated in Figure ..."
See more references to Transformers, Autotransformer in this book.
National Electrical Code 2002 Handbook (National Fire Protection Association//National Electrical Code Handbook)
NFPA

Excerpt - page 103: "... Lighting Loads. For circuits supplying lighting units that have ballasts, transformers, or autotransformers , the computed load shall be based on the total ..."
See more references to Transformers, Autotransformer in this book.
Electric Energy (Power Electronics and Applications)
Mohamed A. El-Sharkawi

Excerpt - page 305: "... Transformers FIGURE 11.7 Connecting a regular transformer as an autotransformer. Is P. Ai N ' E, A2 /load *_ .... ..."
See more references to Transformers, Autotransformer in this book.
Understanding Electric Power Systems: An Overview of the Technology and the Marketplace (IEEE Press Understanding Science & Technology Series)
Jack Casazza and Frank Delea

Excerpt - page 78: "... In this mechanism the ratio can be adjusted while the transformer is energized, providing greater operating ... Another type transformer is an autotransformer, which is used when facil- ities at nearly the same ..."
See more references to Transformers, Autotransformer in this book.
Energy Efficiency Manual: for everyone who uses energy, pays for utilities, designs and builds, is interested in energy conservation and the environment (Energy Efficiency Manual)
Donald R. Wulfinghoff

Excerpt - page 1079: "... circuit as dimming is needed. Step dimming works only with transformer or autotransformer ballasts, especially CWA types. If the ballast is incompatible, one ..."
See more references to Transformers, Autotransformer in this book.
Fundamentals of Physics
David Halliday, Robert Resnick, and Jearl Walker

Excerpt - Index: "... 182 and relativity, 1044-1045 tracers, 370, 370-371 trajectory, 67, 67 transformers, 849 autotransformer, 858 energy transmission requirements , 849 ideal, 849-851 impedance matching, ..."
See more references to Transformers, Autotransformer in this book.
Fundamentals of Physics
David Halliday, Robert Resnick, and Jearl Walker

Excerpt - Index: "... 182 and relativity, 1044-1045 tracers, 370, 370-371 trajectory, 67, 67 transformers, 849 autotransformer. 858 energy transmission require- ments, 849 ideal, 849-851 impedance matching, ..."
See more references to Transformers, Autotransformer in this book.
Illustrated Guide to the National Electric Code (Illustrated Guide to the National Electrical Code)
Charles R. Miller

Excerpt - page 253: "... or raceway )300.3(C)(1)<A. Q For lighting units that have ballasts, transformers, or autotransformers , the supply circuit's computed load is based on the ..."
See more references to Transformers, Autotransformer in this book.
Forced Hot Air Furnaces
Roger Vizi

Excerpt - page 232: "... 232 CHAPTER TWENTY BLACK YELLOW FIGORE 20.3 208/240-V transformer. Autotransformer transformers are rated at 70 VA. All 208/240- V ac ..."
See more references to Transformers, Autotransformer in this book.
Dental Assistant (Dental Assisting Procedures)
Alice E. Pendleton and Pauline C. Anderson

Excerpt - page 547: "... These functions are accomplished by the use of a step-down transformer, a step-up transformer or high-voltage transformer, and an autotransformer. These transformers and the x-ray tube are contained within an ..."
See more references to Transformers, Autotransformer in this book.
Community Economics: Economic Structure and Change in Smaller Communities
Ron Shaffer

Excerpt - page 261: "... or chokes are classified in Industry 3677, and resistance welder transformers in Industry 3623. Airport lighting transformers Autotransformers, electric (power transformers) Ballasts for lighting fixtures Control transformers Current ..."
See more references to Transformers, Autotransformer in this book.
Distribution System Modeling and Analysis
William H. Kersting

Excerpt - page 156: "... the rated kVA and rated voltages of the two- winding transformer and autotransformer as: kVA,f kVA rating of the two-winding transformer kVAaUIO, ..."
See more references to Transformers, Autotransformer in this book.
Water Pumps and Pumping Systems
James B. Rishel

Excerpt - page 259: "... VARIABLE-SPEED DRIVES 8.15 Drives with Multipulse Input Circuits An input transformer or autotransformer can be used to power two or three input rec- ..."
See more references to Transformers, Autotransformer in this book.
Audel Questions and Answers for Electrician's Examinations
Paul Rosenberg

Excerpt - page 136: "... the turns ratio, the current in one side of a transformer is inversely proportional to the ... a transformer. Figure 6-9 An autotransformer. ..."
See more references to Transformers, Autotransformer in this book.
SOC Central
SOC Central
Electronic Filters, Amplifiers & Oscillators - Frequency Devices
Home | About us | Contact Us | Advertisers | Terms of use | Privacy | Link To Us

© 2006, ElectronicDesignNet.com