Hello,
It seems several people are looking for informations on zero sequence impedance calculations (focused on underground cable systems).
I am also in this case and would like to know if a "small" software has been developped for this calculation.
Thank you for your help and your advice...
Hello,
I have to study a very complex cable route, related to a bridge crossing.
138kV XLPE cables are intended to be pulled :
- first in a steel riser along the pier of the bridge
- and in fiberglass tubes along the bridge
- Finally, the cable goes down from the bridge in another steel riser...
Dear All,
For improving the behavior of HV polymeric terminations installed in an heavy polluted area (coil dust + salt rain + fog !!), we would like to use a coating to avoid surface tracking. Basically, we cannot replace the polymeric terminations by porcelain or composite ones.
I would like...
Dear All,
We are looking for on site resonant test system for performing test commissioning on HV/EHV cable links.
Some laboratories in Europe provide this equipement and associated services.
Do you know if equivalent systems would exist in USA or close to the US ?
Thank you very much,
Foudrette
Dear All,
I would like to know if you have already experienced the use of taped joints on 132kV EPR/HEPR insulated cable systems ? If yes, is the background experience OK ?
Thank you for your help,
Foudrette
Hello,
I would like to know in which laying cases (trefoil, flat formation),transposition of HV cables has to be used additionnally to cross bonding of screens. Are there any cases where transposition is not really necessary and we can then use only the cross bonding of screens (when for...
Thank you very much Cuky !
Now I see the explanation, it seems obvious to me !
But however, I was looking for an explanation for a long time, I have read many papers, but unfortunately nothing about the earthing was described.
Thanks a lot once again,
Foudrette
Thank you very much for your detailed explanations.
I understand that if environment is a big issue for the involved project, we need to install an underground return cable.
We plan to ground such cable systems at both ends as no induced currents are generated under DC. But, I have seen in...
Hello,
I would like to know what is the best way of earthing of a HVDC cable (connecting to converter stations in a monopolar mode). The way of laying is to place the screened underground power cable close to the screened return cable.
I have seen that in some cases, it was solidly earthed at...
Dear All,
We would like to extrude terpolymere adhesives on aluminum and copper tubes (diameter around 100mm). The thickness of the coating is about 200µm and the speed of manufacturing is about 1m/min.
We would like to install a non destructive control on line for checking the quality of the...
Dear All,
We would like to extrude terpolymere adhesives on aluminum and copper tubes (diameter around 100mm). The thickness of the coating is about 200µm and the speed of manufacturing is about 1m/min.
We would like to install a non destructive control on line for checking the quality of the...
Dear All,
Since one week, we try to solve a problem of partial discharges measurement on extruded cable drums.
We have observed partial discharges we can not interpretate and which do not seem described in Electra.
These partial discharges look like "candles". I mean that they have a basis...
Dear All,
I have to translate the wording "Thermal rating of accessories" into French. Do you have any idea about the best word in French for translating the idea includes in "rating" ?
Thank you for your help,
Foudrette
Dear All,
Has somebody experience in replacement of oil pressurized cables in steel pipes by HV 138 to 245kV XLPE extruded cables ? More precisely, I would like to know if it is competitive to re-use the steel-pipe placing inside the 3phased XLPE circuit ?
Which are the main parameters...
