3. Submarine cables
It is first necessary to separate this type of cable into two families:
cables laid on the bottom;
buried cables, i.e. cables buried on the seabed.
To locate the fault, we proceed systematically in stages, respecting the logical order of operations.
-
Remote fault location
This search is carried out from one end of the cable, using an echometric method (cf. ).
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Submarine cables
Special features on HVB cables
History of fault finding
(from Henri HUBIN's book – "Un siècle d'histoire – Searching for cable faults" ISBN 2-9511856-1-8 Ó 2001)
EDF network faults
HV grids: 100,000 km, of which a very small proportion is underground. 400 kV, 225 kV, 90 kV and 63 kV
MV networks: 586,000 km, of which 250,000 km underground 95% at 20 kV. The remainder is divided between 10, 15 and very few 30 kV. Purchase and installation of 8,000 km of HVA underground cables per year
LV networks: 654,000 km, of which 216,000 km underground, with...
Job training
As the only network operator, EDF soon needed to develop the skills of groups of agents to carry out this specialist activity. In 1974, Mr. Henri HUBIN, at the Paris Training Center of EDF's Vocational Training Department, in Nanterre, was given the task of building a suitable training program, which would also enable him to invent new methods and materials. In close contact with all the manufacturers of laboratory vehicles,...
References
Standardization
Cable specifications
- Câbles sous plomb, isolés au papier imprégné - NFC 33-100 - 6-67
- Insulated or protected cables for power networks Rigid cables insulated with cross-linked polyethylene and sheathed with polyvinyl chloride. – H1 XDV-A series replaces HN 33-S-33 - NF C 33-210 - 08-95
- Câbles à isolation synthétique avec neutre périphérique, pour réseaux de distribution à basse tension annulée et non...
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