Abstract
This report describes the work canied out to develop a
delta 420 kV compact line with 5 m phase spacing,
utilising line surge an'esters and eliminating shield
wires, Long term audible noise measurements were
taken on a full-scale outdoors test line, Special grading
rings were developed and tested, The design is based on
tension towers only, to overcome the clearance problems
of short insulator strings on compact towers,
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