I have an electrical source 220 Kv or 380 KV at site X and want to pull cables to site Y to privde electricity for this Y site for general lighting and power sockets.So what is the max distance for the cables i can pull from site X without voltage drop affect the voltage or power at site Y.
Care to revise your answer? Unless you plan to pull hundreds of miles of cable, you had better revise your voltage. Thanks. Then I can answer your question. Also provide your POTENTIAL or PLANNED LOAD in terms of MVA or Amps. General lighting and power sockets does not help.
Are you seriously supplying a site with 220-380 Kv to supply general loads? Are you sure that you don't mean 380/220 volts?
For zero voltage drop, the distance is zero. If this is a practical question, you would need to know: 1. How much voltage drop can be tolerated (eg. 1%? 5%? other?) 2. What is the maximum current the cables will need to handle? 3. What is the resistance-per-length of the cable?
You are not providing enough information. 220 KV can provide power of TENS of miles on reasonably modest cable PROVIDING the current drain is not too high. Sorry but the idea of anyone playing around with almost .4 MV without the first idea about loading / cable diameter / insualtion requirements scares the crap out of me! Without the required information, all I can say is With the right cable at 380KV , hundreds of miles As an aside, if this is a temorary site, then the cost of buying generator will be WAY cheaper than the cost of the cable and transformers you wil require to turn 380Kv into 110 / 220V If a permenent fixture, then suggest for normal lighting and sockets (as in no industrial smelting plants!), then you would eed to be dropping the voltage either at the 380kv site OR at least some distance from the new fixture. Houses do not typically have .4 MV coming into the cellar. It might arc a few metres you see if the air is a little humid. Make things a bit dodgy. **UPDATE** Ok, thanks for clarifying the voltage. Now we also know power too -so at 220v, and about 12KW we are looking at VERY roughly 55 Amps. 25mm cable ought to be good for a couple of hundred metres or so. 16mm for upto 50 metres or so. If a LOT further than that, then either go with three phase/380 OR up the size of the cable. Problem is it can start getting pricey. The shorter the run, the lighter the cable can be - to a point - would NOT suggest going below 10mm under ANY circumstances. You will always get SOME voltage drop, but providing it is in the order of a couple of volts here and there, there is no appreciable waste / heat generation. Is this a fixed installation or a temporary one - if temporary and a fair distance away I would STILL be inclined to sugges a genset hire might work out cheaper than drums of suitable cable.
