Download or read book A Calibration Service for Voltage Transformers and High voltage Capacitors written by William Eugene Anderson and published by . This book was released on 1988 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Calibration Service for Voltage Transformers and High voltage Capacitors written by William E. Anderson and published by . This book was released on 1988 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Measurements Services written by and published by . This book was released on 1988 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Measurement Services written by William E. Anderson and published by . This book was released on 1988 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibration of Voltage Transformers and High Voltage Capacitors at Nist Classic Reprint written by William E. Anderson and published by Forgotten Books. This book was released on 2017-12-13 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Calibration of Voltage Transformers and High-Voltage Capacitors at Nist In the past nist had used a comparative null method to calibrate voltage transformers. The un known transformer was compared to a nist refer ence transformer using a voltage comparator consisting of a variable resistive divider and a mu tual inductor. Reference transformers were avail able with ratios ranging from up to Measurement uncertainties in the comparison of the unknown transformer with the reference trans former were to.ol% for ratio and t0.3 minutes for phase angle. The ratio and phase angle of the reference transformers were known to about the same accuracy. There are several disadvantages to this approach. Since the comparator has a limited range, several reference transformers must be available to cover the anticipated users' needs. The ratio and phase angles of each one of these trans formers must be carefully determined over the secondary voltage range of interest. These trans formers then have to be rechecked at regular inter vals to determine if the ratios and phase angles have changed. If a direct measurement method were available that was sufficiently accurate and straightforward to make the calibration of these reference trans formers a simple task, then that method could be used to measure the client's transformer directly. At nist, the direct null method in use origi nally involved balancing the secondary of the ref erence transformer against the output of a resistive divider used in conjunction with a variable mutual inductor to provide phase angle balance. Such a measurement was difficult because the resistive di vider ratio changed with heating. Since the late 19605 a direct null method has been available that is straightforward and accurate and is now used at nist in place of comparative methods us ing reference transformers. Capacitors are invariably measured by balancing the unknown capacitor against a known standard using some type of bridge arrangement. There are a variety of such bridges described in the literature The one most used in high-voltage applications in the last 60 years is the Schering bridge (fig. The two high-voltage arms of this bridge consist of the standard and unknown capacitors. The two low voltage arms are resistors (one has a parallel capacitor for phase angle balance). 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.

Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1990 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1957 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the National Institute of Standards and Technology 1988 Catalog written by Rebecca J. Pardee and published by . This book was released on 1989 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibration and Test Services written by United States. National Bureau of Standards and published by . This book was released on 1970 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research of the National Institute of Standards and Technology written by and published by . This book was released on 1988 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports NIST research and development in the physical and engineering sciences in which the Institute is active. These include physics, chemistry, engineering, mathematics, and computer sciences. Emphasis on measurement methodology and the basic technology underlying standardization.

Download or read book Journal of Research of the National Bureau of Standards written by and published by . This book was released on 1988 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBSIR written by and published by . This book was released on 1978 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibration and Related Measurement Services of the National Bureau of Standards written by United States. National Bureau of Standards. Office of Measurement Services and published by . This book was released on 1978 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commerce Publications Update written by and published by . This book was released on 1988 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibration and Related Measurement Services of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1978 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NIST Handbook written by and published by . This book was released on 1989 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: