Condition Monitoring of Composite Insulators
UK Power Networks
UKPN Innovation Team
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Innovation Funding Incentive
Carbon Emission Reduction Technologies
Composite insulators are now deployed throughout the world and are
steadily replacing traditional ceramic and glass insulators. Low weight
and physical robustness are two properties which have led to an
increasing market share for composite insulators over the last 20 years.
However, there is concern over the long term ageing of these
This work has characterised the millimetre scale arcing activity between
water droplets and developed an experimental knowledge and
theoretical understanding of how this leads to macroscopic behaviour.
In particular, it identified the local surface conditions on the millimetre
scale which cause the ageing of hydrophobic material surfaces.
Develop reliability models for hydrophobic insulators, recommend test
schedules for type approval and product development and identify
condition monitoring techniques for existing installations.