Ageing of liquid impregnated cellulose for power transformers
Cellulose products – paper and pressboard – are used in transformers as electric insulation and mechanical support for windings and leads. This Brochure mainly addresses the mechanical performance of the cellulose products. Products and standards are presented. Then ageing mechanisms are described, along with influence of ageing drivers as water and oxygen, and the performance in different impregnating liquids. Ageing markers, diagnostics and life management techniques are discussed. Finally, various test methods used for ageing studies are described.
File Size: 4,7 MB
Pages NB: 94
may download free of charge all publications including most recent ones
may download free of charge publications over three years old and purchase all publications
HOW TO ACCESS TO E-CIGRE?
Click here to read a short guide to setting up your account and obtaining access to the global e-cigre.org website for all technical literature.
Management guidelines for balancing in-house and outsourced overhead transmission line technical expertise
Moisture measurement and assessment in transformer insulation - Evaluation of chemical methods and moisture capacitive sensors
Non-intrusive methods for condition assessment of distribution and transmission switchgear
Voltage Source Converter (VSC) HVDC for Power Transmission - Economic Aspects and Comparison with other AC and DC Technologies
Update of Service Experience of HV Underground and Submarine Cable Systems
Recommendations for testing of long AC submarine cables with extruded insulation for system voltage above 30 (36) to 500 (550) kV (This TB replaces electra article ELT_189_1)