March 24, 2005
Airborne Corona and Arcing Inspection Tips
To inspect insulators it is recommended to fly perpendicularly to the lines and be able to look at the insulators from the side rather then from above. This is true particularly if ceramic insulators are inspected because sometime the corona is just below the ceramic bell .
A distance of 40 meters from the lines at an angle of 30 degrees is recommended since you want to be able to see all three phases.
A speed of 30-40 km/h will let you see clearly corona sources. There is no need to stop at each pylon, unless you suspect something and wish to explore it while hovering. To hover you need a strong enough helicopter.
Tip provided by the DayCor camera technologies http://www.daycor.com
Tel: (866) 279-8672
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