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QUESTIONS AND ANSWERS

PREVIOUS QUESTIONS AND ANSWERS ASKED ABOUT BLL

QUESTION
Can the same preform ties be used when using on a running angle intermediate pole as on a straight intermediate pole?
ANSWER
Yes the same preform ties can be used when the conductor is fitted on the side of a pin insulator as over the top of the insulator.
 
QUESTION
What is the difference windage between compacted & non-compacted cable?
ANSWER
Very little difference, too small to measure effectively increasing windage could be disregarded.
 
QUESTION
Is it still Ok to use IPC’s on non-compacted cable?
ANSWER
Yes as the IPC’s cover the tolerances required for both non-compacted and compacted cable.
 
QUESTION
Why is there so much compacted cable around if there is little difference between compacted and non-compacted?
ANSWER
Power cable is compacted cable therefore companies which manufacture Power Cable and Overhead Line cable often just produce compacted cable. Obviously in a suspended form compacted cable can experience vibration problems.
 
QUESTION
What progress has been made with Heatshrink?– Jim Eustace, ESB used a heatshrink on joints on the South Ireland line which were quite complicated and time consuming to fit.
ANSWER
Amokabel is testing a new cold shrink at the moment which works successfully for 17-18kV but not quite sorted out properly for 24kV and needs further development. When testing is completed and this product can be launched it will provide a good solution for joints.
 
QUESTION
What is the guaranteed life time for BLL?
ANSWER
In Scandinavia BLL covered conductor is guaranteed for 40 years. This will vary slightly in different climates around the world.
 
QUESTION
Is it possible to provide additional end caps when using IPC's so that a totally waterproof joint can be made?
ANSWER
Yes, end caps for all conductor diameters are available.
 
QUESTION
Are there any independent tests that have been carried out to ascertain vibration, tracking & Insulation performance?
ANSWER
All three areas have been independently tested by EA technologies. This testing was funded by Amo Kraft, United Utilities, Scottish Power and GPU Power and are available to parties who funded these tests.


 
 
 
 
Ritelite (Systems) Ltd, Meadow Park, Bourne Road,
Essendine, Stamford, Lincolnshire, PE9 4LT
Tel. 01780 765600 - Fax. 01780 765700 E-mail.
sales@ritelite.co.uk