Testing Potential Transformers Classic Reprint
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Testing Potential Transformers Classic Reprint
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Author : H. B. BROOKS
language : en
Publisher:
Release Date : 2022
Testing Potential Transformers Classic Reprint written by H. B. BROOKS and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Watthour Meter Method Of Testing Instrument Transformers Classic Reprint
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Author : PAUL GOUGH. AGNEW
language : en
Publisher:
Release Date : 2022
Watthour Meter Method Of Testing Instrument Transformers Classic Reprint written by PAUL GOUGH. AGNEW and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Transformer Practice
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Author : William Thomas Taylor
language : en
Publisher: Forgotten Books
Release Date : 2018-03-18
Transformer Practice written by William Thomas Taylor and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-18 with Technology & Engineering categories.
Excerpt from Transformer Practice: Manufacture, Assembling, Connections, Operation and Testing The development of the alternating-current transformer dates back about 25 years. At that time very little was known re garding design for operation at high voltages, and the engineer of the present day can scarcely realize the difficulties encountered in the construction of the early transformers. The high-voltage transformer made long-distance trans mission work possible, and the increased distances of transmission stimulated the design of large transformers. In the early days of transformer development as many as 15 to 20 transformer secondary windings have been connected in series to facilitate the operation of a long-distance transmission system, the maxi mum rating of each transformer being not greater than 10 kw. However, a method of constructing large transformers has long been devised by which an enormous amount of power may be transformed in a single unit. Such designs embody principles of insulation for high voltages and various methods for maintain ing a low operating temperature. Ten years ago a 500-kilowatt unit was considered to be a large size of transformer. The history of ten years' development has shown a most interesting process of evolution: it has marked more than a tenfold increase in size up to the present day. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Method For Testing Current Transformers Classic Reprint
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Author : FRANCIS B. SILSBEE
language : en
Publisher:
Release Date : 2022
Method For Testing Current Transformers Classic Reprint written by FRANCIS B. SILSBEE and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Testing Potential Transformers
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Author : Herbert Barton Brooks
language : en
Publisher:
Release Date : 1914
Testing Potential Transformers written by Herbert Barton Brooks and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1914 with Electric transformers categories.
Stationary Transformers
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Author : William T. Taylor
language : en
Publisher: Forgotten Books
Release Date : 2017-10-19
Stationary Transformers written by William T. Taylor and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-19 with Technology & Engineering categories.
Excerpt from Stationary Transformers: Theory, Connections, Operation and Testing of Constant-Potential, Constant-Current, Series and Auto Transformers, Potential Regulators, Etc The development of the alternating-current transformer dates back about 25 years. At that time very little was known regarding design for operation at high voltages, and the engineer of the present day can scarcely realize the difficulties encountered in the construction of the early trans formers. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Equipment For Testing Current Transformers Classic Reprint
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Author : Francis B. Silsbee
language : en
Publisher: Forgotten Books
Release Date : 2017-10-27
Equipment For Testing Current Transformers Classic Reprint written by Francis B. Silsbee and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-27 with Technology & Engineering categories.
Excerpt from Equipment for Testing Current Transformers The equipment and methods used for this purpose at the Bureau of Standards at Washington have been modified and enlarged from time to time to keep pace with the increasing demands in accuracy and range of the transformers to be tested. The object of this paper is to describe the equipment and methods 1 now in use at this Bureau in the hope that the data given may be of assistance to other labora tory workers who may wish to install apparatus for similar work. The accuracy needed in this class of testing should, if possible, be so high that errors in the certified values will be negligibly small in comparison with the inaccuracy likely to occur in the next step in the measurement process; that is, in the comparison in the field between the standard transformer and the working transformer. A limit to the possible accuracy is, of course, set by the repeatability of the transformer under test. This limit is influenced by a number of factors, among which are changes in the magnetic condition of the core as a result of previous operation, uncertainties in the temperature of the transformer windings and hence in their resistance, and uncer tainty in the exactness with which the burden used in the field is duplicated in the test. In the case of hole-type current transformers additional uncertainty arises because of differences in the position of [the primary conductor in the hole, and in the position of the return lead. The magnitude of the changes in calibration resulting from these effects depends greatly upon the type of transformer, but may amount to several tenths of 1 percent. The sensitivity of the present equipment is such that a change of percent in ratio and minute in phase angle is definitely detectable even at a secondary current as small as ampere. Changes in the performance of the transformer under test are there fore often noted. The accuracy of the equipment, since it involves the calibration of resistance standards of widely different values with the additional liability to errors from skin effect and residual self - induct ance, is, perhaps, not as high as the precision mentioned above would indicate. The accuracy limits printed on the Bureau's certificate form (viz, percent in ratio and 3 minutes in phase angle) are, however, certainly very conservative. In reducing the observed values all corrections are normally carried to the nearest percent and minute and the resulting values are then rounded off in the certificate to the nearest percent and 1 minute. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The Testing Of Transformer Steel Classic Reprint
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Author : M. G. Lloyd
language : en
Publisher: Forgotten Books
Release Date : 2017-11-21
The Testing Of Transformer Steel Classic Reprint written by M. G. Lloyd and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-21 with Technology & Engineering categories.
Excerpt from The Testing of Transformer Steel Consequently, methods of testing With alternating currents have come to be regarded as the only satisfactory way of making these measurements, and present efforts are directed to securing the best conditions for this form of test. In the wattmeter method, the electrical energy Which is supplied to maintain the alternating magnetization is measured With a wattmeter, While the maximum magnetic induction produced in the specimen is determined by a voltage measurement at the terminals of the magnetizing Winding or at the terminals of a secondary Winding placed around the same core of test material. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Testing Potential Transformers
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Author : H. B. Brooks
language : en
Publisher:
Release Date : 1914
Testing Potential Transformers written by H. B. Brooks and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1914 with Electric transformers categories.
The Determination Of The Constants Of Instrument Transformers Classic Reprint
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Author : P. G. Agnew
language : en
Publisher: Forgotten Books
Release Date : 2016-10-13
The Determination Of The Constants Of Instrument Transformers Classic Reprint written by P. G. Agnew and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-13 with Technology & Engineering categories.
Excerpt from The Determination of the Constants of Instrument Transformers The determination of the ratio and phase angle of instrument transformers is an important problem, and one in which consider able precision is required for technical work. The principle of the method here described is the same for both current and potential transformers, being an application of the potentiometer method. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.