Analysis of real operating condition revealed that HVDC transformers experience combined
effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated …

To investigate the characteristics of micro bridges and their interactions with partial
discharge (PD) in oil-paper insulation under DC voltage, an experimental platform with two …

Contaminated transformer oil has been tested under non uniform electric fields and the
effect of different electrode systems presented in this paper. Three different electric fields …

The effect of cellulose particles contamination on transformer oil has been investigated.
Different sizes and concentration levels of cellulose fibres were used to contaminate the …

There are two experimental set up have been established to investigate the bridging effect
between two electrodes with different potentials under ac and dc voltages. This paper will …

Cellulose particle accumulation under AC, DC and DC biased AC electric field in
transformer oil has been investigated in this paper. Different levels of particle concentrations …

In this paper we have studied pre-breakdown characteristics of transformer oil in the
presence of different levels of contamination. The contaminant is fibrous dust from …

Transformer failure statistics from all over the world showed that almost 30% of them were
due to insulation. Large amount of those failures were due to particles in transformer oil …

Experiments were carried out on transformer oil contaminated by cellulose fibre. After the
high voltage was applied to the electrodes, the pressboard particles accumulated in the …

This report describes one aspect of a wider research study on exploratory talk within
collaborative small groups in secondary mathematics lessons. It outlines students' views of …