Title :
Dielectrometry measurements of effects of anti-static additives on transformer board
Author :
Du, Yanqing ; Zhan, Markus
Author_Institution :
MIT, Cambridge, MA, USA
Abstract :
Summary form only given, as follows. Anti-static additives are used to increase the conductivity of insulating materials in order to reduce electrification due to liquid flow or high electrostatic charges on the surface. The diffusion process of anti-static additives from the transformer oil into transformer board (pressboard) is monitored using a three-wavelength interdigital sensor that performs dielectrometry measurements of permittivity and conductivity in order to measure the spatial distributions of additives in the pressboard as a function of time. Measurements are presented as a function of additive concentrations and pressboard thickness, for various system temperatures and moisture levels
Keywords :
electrical conductivity measurement; insulation testing; moisture; permittivity measurement; power transformer insulation; power transformer testing; power transformers; surface charging; additive concentrations; anti-static additives; conductivity; dielectrometry measurements; diffusion process; electrification reduction; electrostatic surface charges; insulating materials; liquid flow; moisture levels; permittivity; pressboard; pressboard thickness; spatial distributions; system temperatures; three-wavelength interdigital sensor; transformer board; transformer oil; Additives; Conducting materials; Conductivity measurement; Diffusion processes; Electrostatic measurements; Fluid flow; Oil insulation; Permittivity measurement; Power transformer insulation; Time measurement;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564657
