ATE Central (National Science Foundation)
This web page, from Environmental and Natural Resources Technology (EARTh) Center, provides instructional materials related to high-voltage open-circuit (Voc) testing for photovoltaic systems. The content begins with a brief overview of the material and then is organized into the following sections: Introductory Courses, Standard Test Conditions, Temperature Effects, Reverse Polarity, Mismatched Strings, and Test Scenarios. The Introductory Courses section includes the instructor guide and Solar Photovoltaic Course 1 and 2. The 4-page instructor guide includes a course introduction, information for module 1 and 2, and sections on standard test conditions, temperature effect on VOC measurements, the instructor's role, and more. The course aims to equip students with the essential skills for properly commissioning photovoltaic systems, with a focus on high voltage testing. The course is suitable for professionals and students with basic electrical knowledge. The rest of the content includes interactive modules and simulations, videos, and a final assessment. 
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Oleseahorse · 2015
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Bulletin of Miscellaneous Information (Royal Gardens Kew)
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Sheldon Debardelaben · 1979
The author has been working on improved methods of conducting low voltage testing of electronic telephone switching equipment. The problems with existing techniques are discussed, together with a description of voltage reduction equipment being developed to eliminate these problems.
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Battula Santhosh Kumar · 2018
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J. R. Lloyd, N.A. Connelly, Zhi Zhang et al. · 2011
Constant voltage electromigration was investigated as a method for assessing reliability in narrow Cu conductors. It is demonstrated theoretically that constant voltage (CV) testing can offer advantages over constant current (CC) testing for material that may vary significantly in geometry (thickness or line width) from sample to sample. Using known misprocessed material, this anticipated result was confirmed. Experiments with material that was properly produced showed that the advantages of CV over CC were minimal, but the values of the median time to failure and the lognormal standard deviation of the CC and CV stressed material agreed quite well. A potential difference in the failure distribution was observed, but needs to be confirmed.
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J. H. Hagenguth · Electrical Engineering · 1959
NUMEROUS TECHNIQUES for use in acceptance testing of apparatus have been developed over the past 25 years. It is not possible to cover, because of lack of space, the various devices that may be used in high-voltage laboratories for development work, except in a very general way. At the end of this article, a list of papers most easily accessible to American readers is included. In addition, rather comprehensive bibliographies are available. <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1–3</sup> There have been many investigators who have made important contributions but are not mentioned because of the necessity for keeping references to a reasonable length.
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N. I. Kotel'nikov · Measurement Techniques · 1974
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A. G. Poteryakhin · Measurement Techniques · 1968
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Middleton, W. I., Dawes, Chester Laurens. · The Journal of the Abraham Lincoln Association
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Elliott Brothers Ltd. · Journal of Scientific Instruments · 1945
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2016
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W. I. Middleton, C. L. Dawes · Proceedings of the American Institute of Electrical Engineers · 1914
In this country rubber compound, paper, and cambric are generally used for cable insulation. From the formula S = 0.868 V/d log <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</inf> D/d, the stress at any point in a homogeneous insulation may be determined. The minimum stress and the maximum allowable voltage occur when the conductor is 10/27 of the sheath diameter. The present irrational practise of testing cables should be standardized to conform to this formula or a modification of it. Over-stressing of the insulation is accompanied by a change of insulation resistance and electrostatic capacity. No one factor of safety is applicable to every cable system, but one must consider the conditions of operation as well. In testing the voltage may be applied: (1) by submersion; (2) between the conductor and metallic sheath; (3) between wires. The submersion test is the most severe. A sine wave is desirable for testing purposes, but rarely occurs in a commercial generator under these severe conditions of load. Reactance cannot always be used successfully to reduce the volt-ampere load on the generator. With a distored wave an a-c. voltmeter gives only a poor indication of the maximum voltage. The writers have devised an instrument based on the oscillograph principle, with which the maximum voltage may be determined, regardless of wave form.
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C. Kibblewhite · The journal of the Institution of Electrical Engineers · 1936
Routine over-voltage testing by direct current at high voltages is considered as a means of locating and eliminating weaknesses in the insulation of high-voltage cables, which might otherwise develop into breakdowns in service. A series of tests carried out on a cable network operating at 11 kV is described, from the results of which conclusions are drawn as to the lines on which tests should be carried out and the extent to which service breakdowns may be eliminated.
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Tadeusz Czaszejko · IEEE Electrical Insulation Magazine · 2014
An ever-increasing appetite for electrical energy by industrial, commercial, and household consumers has resulted in a continuously growing demand for transmission capacity and improved reliability of elecricity supply. The reliability of a HV power plant must be maintained at a high level over its lifetime, typically 50 years. All newly manufactured components of electricity networks undergo various types of tests to ensure their reliability and longevity. The tests follow specifications set out in national and international standards. These tests could be described in general terms as: design-verification tests,; production-quality tests, and ; tests after installation. Of all systems in a HV plant, cable systems must satisfy possibly the widest range of test requirements. So in this article we use electrical testing of cable systems to show the origins of the main test specifications. Although we refer throughout the paper mainly to cables with extruded insulation and their accessories, most of the discussion can be generalized to other HV equipment such as power transformers or insulators. We limit our discussion to insulated cable systems built to transmit electrical power in bulk at the subtransmission and transmission voltage levels, i.e., those rated above 30 kV.
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Transactions of the American Institute of Electrical Engineers · 1940
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Oct Rfnal-tr, Ii W V, O~j W. G. Dunbar · 1984
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V. V. Kopshin · Measurement Techniques · 1980
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Wolfgang Hauschild, Hugo Bachmann, M. Baronick · IEEE Transactions on Electrical Insulation · 1991
The automation of impulse voltage tests by a control and measuring system based on computers (computer-aided control and measurement system) offers new possibilities for high-voltage (HV) research and quality inspection. An industrially manufactured computer-aided control and measurement system is presented. Its hardware is characterized by a master computer for data input, operation, and data processing, and a slave computer for all fast control processes. It can be extended by a digital voltage/time measuring system. The computer-aided control and measurement system is well protected against interference by protective circuits, optical links, and electromagnetic shielding. The software comprises the automatic control and supervision of the generator, programs for all typical impulse voltage tests, evaluation of the voltage parameters, statistical processing of the measured data and printing of the test record.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Elena Bankowski, Thomas J. Meitzler, J.R. White et al. · 2016
In an era when vehicle weight is very important to mission success, non-traditional technology must be developed to provide protection without adding parasitic weight to a vehicle, such as added by heavy armor packages. Electromagnetic Armor (EMA) is one possible technology that may lead to the realization of achieving lighter weight with equal or greater protection levels. We conducted a 1,000 mile simulation of a combat vehicle terrain vibration test with high voltage, pulse forming capacitors for EMA applications at TARDEC. The test results confirmed that high voltage pulse forming polypropylene (PP) capacitors were durable and could withstand vibrations from various types of terrain in a real battlefield environment. We also conducted temperature tests with high voltage, pulse forming PP capacitors at TARDEC. High voltage and high frequency capacitor tests were conducted at the Army Research Laboratory (ARL). The test results indicated that high voltage pulse forming PP capacitors were durable and could probably withstand environmental changes, within operational range, in a real battlefield environment.
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