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  • Thermally Upgraded Paper (Revised Oct. 1, 2003) - IEEE
    Typical values for nitrogen content of thermally upgraded papers are between 1 and 4 percent when measured in accordance with ASTM D-982
  • INSULATING CREPE PAPER GRADES FOR POWER TRANSFORMERS
    NITROGEN CONTENT % #RIF! DISSIP FACTOR (TAN DELTA) 55° % 0,087% 0,143% 0,258% upgraded Class "E" thermally upgraded Class "E" thermally upgraded CREPE PAPER WEIGHT gsm 100 ± 5 130 ± 5 155 ± 10 THICKNESS (CREPE) mm 0,28 ± 0,03 0,36 ± 0,03 0,35 ± 0,05 INSULATING CREPE PAPER GRADES FOR POWER TRANSFORMERS THERMALLY UPGRADED
  • Cellulose Insulation Paper Testing: Three Key Tests
    Nitrogen content tests are designed to quantify Nitrogen levels in thermally upgraded paper Upgrading the papers gives them greater thermal resistance, therefore, slowing down cellulose degradation This increases the insulation life and the lifetime of the transformer
  • IEEE Standard Terminology for Power and Distribution Transformers - NRC
    A paper is considered as thermally upgraded if it meets the life criteria as defined in IEEE Std C57 100 [B 14]; 50% retention in tensile strength after 65,000 hours in a sealed tube at 110C or any other time temperature combination given by the equation:
  • Evaluation of Aging for Thermally Upgraded Paper in Mineral Oil
    describes evaluations of amine-impregnated thermally upgraded paper insulation’s thermal degradation characteristics and decomposition reactions in mineral transformer oil The thermal resistance of the thermally upgraded paper is evaluated by comparison with Kraft paper insulation Further, aging
  • On the experimental determination of the nitrogen content of thermally . . .
    This paper reports the temperature-dependence of methanol generation and the tensile index under ageing conditions for two paper oil systems: one consisting of a standard wood Kraft paper and the other of a thermally-upgraded Kraft paper (TUK)
  • Thermally Upgraded Paper – Hi-Tech Insulation
    Upgrading is achieved by adding nitrogen to the paper pulp Nitrogen replaces the oxygen which otherwise oxidizes and ages the paper at high temperature Coil winding, barrier, core layer insulation in transformers It is also used in motors and other electrical applications where high dielectric and physical strength are required
  • High Density Thermally Upgraded Paper - mikitoku. co. jp
    High Density Thermally Upgraded Paper Features ・ 100% sulfate wood pulp ・ High purity ・ Low shrinkage ・ High mechanical strength ・ High finishing accuracy ・ Many Japanese transformer-makers who require high-quality products adopt our products ・ Natural (Kraft) Color Size ・ 1000mm×100kg roll
  • Assessing Changes in Thermally Upgraded Papers with Different Nitrogen . . .
    A promising correlation between methanol concentration and the paper tensile index with different nitrogen content was determined This correlation could be used as a basis for developing tools to assess power transformers residual life
  • a7dd82f1-c183-443e-9d57-b98fd30f7430 - GeM
    General - This specification governs the quality requirements of thermally upgraded micro-crepe kraft paper The material in insulating oil shall have temperature index of at least 1050C Applications — This paper can be used as insulation paper for wrapping over winding conductor in transformers, reactors etc





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