|Statement||D.M. Kazarnovsky, et. al. ; Translated by P.S. Ivanov|
|The Physical Object|
|Number of Pages||287|
Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair, Second Edition covers all aspects in the design, deterioration, testing, and repair of the electrical insulation used in motors and generators of all ratings greater than fractional horsepower size. It discusses both rotor and stator windings; gives a. Proceedings of the symposium held in Bal Harbour, Florida, December Rising energy prices have been encouraging work on the use of thermal insulation to conserve energy. Here, more than 50 papers discuss new materials, assessments and properties of foams, loose-fill behavior, system performance. Rather, it is designed as a desk volume to provide quickly accessible data, design input, comparisons, standards, and suppliers for insulating systems and materials. This is the only single source devoted to all classes of insulators for electrical and electronic applications, offering immediate and easy access to detailed information in one. It is an essential reference for engineers and technicians responsible for the operation, maintenance, and testing of power system equipment. Comprehensive coverage includes dielectric theory, dissolved gas analysis, cable fault locating, ground resistance measurements, and power factor, dissipation factor, DC, breaker, and relay testing s:
D Terminology Relating to Electrical Insulation. D Test Method for D-C Resistance or Conductance of Moderately Conductive Materials. D Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions. D Practice for Conditioning Electrical Insulating Materials for Testing. High Voltage Testing High Voltage Testing Procedure Electrical equipment must be capable of withstanding overvoltages during operation. Thus by suitable testing procedure we must ensure that this is done. High voltage testing can be broadly classified into testing of insulating materials (samples of dielectrics) and tests on completed. Thermal insulation materials fall into the latter category. Thermal insulation materials may be natural substances or man-made. If the density of insulation is low, the air or gas voids are comparatively large and this makes for the best insulation for low to medium temperatures where compression and/or vibration is not a factor. (a) For type test, the test is conducted for 3 minutes. (b) For routine test, the test is conducted for 1 minute. If the mats pass the above AC Proof Voltage test for the above time periods, then it is clear that the insulating mat meets the safety requirements required to prevent any burn injury or even death in some cases due to high voltage.
These test methods are used to determine the flexural properties of unreinforced and reinforced plastics, including high modulus composites and electrical insulating materials utilizing a three-point loading system to apply a load to a simply supported beam (specimen). The method is generally applicable to both rigid and semi-rigid materials, but flexural strength cannot be determined for. insulating material is a complex physical phenomenon but it may be generally characterized as a sudden change in the resistance of the insulation under test due to the applied voltage. Simply stated, the test voltage breaks down the insulating properties of the material. The mechanism of dielectric breakdown begins with the application of a strong. The results of measurements carried out on some selected materials are tabulated. Methods of testing electcal insulating materials for cryogenics E. Javorsky and M. Popelis With the great impetus on the search for practical applica- tions of cryogenics, interest in the measurement of the physical characteristics of insulating materials is also. Insulation Resistance test measures the resistance of the electrical insulation between the copper conductors and the core of the stator. Ideally, this resistance should be infinite. In practice, is not infinitely high. Usually, lower the insulation resistance, it is more likely that there is a problem with the insulation. Dielectric Breakdown.