Re-examination of temperature standards for electrical insulation

Moses, G. L.

doi:10.1109/ee.1952.6437790

Electr. Eng.

1952

DOI: 10.1109/ee.1952.6437790

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Re-examination of temperature standards for electrical insulation

G. L. Moses

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“…These include alternative methods and procedures for applying various types of voltages to detect changes in the test specimens 3. A suitable breaker is manufactured by Heinemann.Authorized licensed use limited to: KTH Royal Institute of Technology.…”

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IEEE Standard Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery

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Authorized licensed use limited to: KTH Royal Institute of Technology. Downloaded on October 11,2014 at 07:40:09 UTC from IEEE Xplore. Restrictions apply. iii Foreword (This foreword is not part of IEEE Std 117-1974, Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery.)The Institute wishes to acknowledge its indebtedness to those who have so freely given of their time and knowledge, and have conducted experimental work on which many of the IEEE publications are based.Early work with random-wound models of coil and slot assemblies (motorettes) indicated that a wide range of life expectancy with a given insulation system could be obtained. In 1958, as a result of an industry round robin, the Committee did not consider the data reported to be sufÞciently consistent to warrant standards being based upon the Þgures. Accordingly a new test program using motorettes was initiated.The Working Group delved deeply into each element of the 1956 version of this standard. The result was a speciÞc written set of instructions regarding the preparation of the motorette, and the testing procedure itself. In the latter case, it was found that a special humidity environmental chamber had to be designed to reduce variation due to lack of humidity control. These features are discussed and referenced in the procedure itself.The general conclusion of the second round robin was that test results indicated that the IEEE Std 117-1974 Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery must be rigidly adhered to in all testing details, if uniform results between different testing locations are to be achieved.

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IEEE Standard Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery

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Re-examination of temperature standards for electrical insulation

Cited by 1 publication

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IEEE Standard Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery

IEEE Standard Test Procedure for Evaluation of Systems of Insulating Materials for Random-Wound AC Electric Machinery

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