The classic definition goes something like this:“partial discharge is an electrical discharge
that shunts only part of the insulation between electrodes at different potentials”. We have …

Experiments performed on different oils from in service transformers show that the
conductivity of these oils can significantly decrease as a function of the time elapsed from …

To operate power transformers long-term, as well as ensuring their insulating reliability, it is
important to study age-related decline in various insulating oil characteristics and the …

Degradation of insulation is one of the main failure causes of transformers. Phenomena like
thermal ageing of oil and paper, humidity, gases dissolution and occurrence of partial …

This PhD thesis addresses the field of dielectric materials for power transformers, focusing
on the development of a method for accelerated aging of mineral oil under the action of high …

Successful detection of an incipient electrical failure within the windings of power
transformers is based upon the possibility of determining the amount and nature of the …

This work is devoted to an accurate investigation on the variations of the physicochemical
properties of three transformer mineral oils of different levels of degradation submitted to …

Partial discharges in oils are influenced by the actual dielectric properties of the liquid and
especially degradation products may influence the phenomena. As a consequence of partial …

Three possible mechanisms of transformer oil breakdown, arising at low electric field
strength values in the range from 1.3 kV/mm to 4 kV/mm, are presented. At higher values of …

Researchers and practitioners interested in the operation, monitoring and diagnosis of
electrical equipment (such as: transformers, motors and generators, circuit breakers, etc.) …