Anyone have any comments on water blocking conductors on HV cables? In particular, does using non conducting vs semi conducting tapes make any difference? We're looking for cables that we can joint or terminate without the need to open strands and pull out the tapes first.
thanks
Where is a good place to look for standard equations on transmisison line regulation, line losses, and also, information on use of transposition structures to manage the above?
thanks
Has anyone had experience with paper insulated cables at 11kV failing due to damage of the metalised paper screen? I know screening isn't mandatory for 11kV cables, but if you have it, have you had any experience of faults arising from imperfections or tears in the screen?
thanks
Has anyone had some experience with using DTS systems to monitor power cables, particularly at higher voltages? I want to find some companies that supply the equipment, apart from SENSA/York in the UK. I have found a couple of others (Hitele, Optech) but I want to find out if there are other...
I'd appreciate any ideas on places to look for info on determining the condition of paper lead power cables (33kV mostly) in aged cables. I'm trying to develop some guidelines for determining when a cable is approaching the end of its economic life, and how to prioritise replacement programmes...
Does anyone have experience with installation and operation of HV (11kV) polymeric cable systems - EPR, XLPE etc? I am interested in experiences with overheating due to backfill drying out when operating cables at around 90+oC, or mutual heating, especially of paper insulated cables run in the...
Does anyone have any experience with snaking 1200mm or larger power cables in tunnels? Im interested in how hard it is to do this with manual labour or if mechanised systems are better? I have to get up to 8 circuits into a 3 metre x 3 metre tunnel. The circuits are up to about 1000 metres long...
Does anyone have experience using XLPE insulated pilot cables, and if so, what sort of sheath materials have you used? I have a proposal to use fibreglass tapes under Fire resistant PVC in a tunnel, but this is pretty expensive. Is all this necessary? What about just FRPVC? We normally use HDPE...
