115kV Straight & Stop Joint On LPLF, PILC Cables In Cable Vault
Published 20 Apr 2021
This series of excellent photographs taken from site have been kindly provided by: Douglas Page, Instructor & Cable Splicer at Hydro One (Training and Development Services)
“It must be said, cable jointing is a team effort with multiple cable splicers, confined space entry personnel, there’s a “kitchen cook” that is outside the space, that keeps tapes and oil hot, hands us kettle after kettle of flushing oil, certain size rolls and tapes before we know we need them – there are very few splices that are completed by one person,” adds Douglas.
HV-EHV Cable Splicing Team : Douglas Page, Peter Hatziiounou, Craig Dowling, Walter Ryan and Bob McViegh in the “kitchen”.
115kV Straight & Stop Joint On LPLF, PILC Cables In Cable Vault
Pictured: Classic “roman arch” conductor, 115kV LPLF, PILC Transmission Cable (Low Pressure Liquid Filled, Paper Insulated Lead Covered).
Originally installed in the 1960’s the sequence shows back to back cable splices in a 16 foot cable vault – the cable jointing was required after the original cable splice became damaged in an explosion. The images cover the cable preparation and jointing stages required to reinstate the 115kV cable.
Conductor insert to prevent crushing the oil duct during cable crimping
Cable polishing
Hand taping by the cable splicer to restore cable to “factory insulation diameter”
After build up is complete, “carbon black” is added – this is the semi-conductive screen in modern cable manufacture
In the background is the completed insulated cable splice – the EHV cable splicers then had to make the 115kV stop joint shown in the preceding images about 18″ to 24″ distant from the straight joint on the same cable to allow the installation to be accommodated within the confines of the cable vault.
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