Using 400v transformer pair to avoid cable runs...

[Marvo]

...the idea for this being that this will be cheaper than upgrading the cable and digging up 50m + of playground.

Don't you have directional moling contractors in he UK?

We installed transformers for remote pump and booster station supplies before and it's a very expensive exercise. It will only be worth it if the playground repairs will for some reason cost an arm and a leg or if the distance is over a kilometer.

Edit.
Why did they suggest 400v? You may as well go 1kV if the SWA is rated high enough.

 

[Knobhead]

For gods sake Marvo, 1KV! 960V and stay in the realms of LV.

 

[Engineer54]

For gods sake Marvo, 1KV! 960V and stay in the realms of LV.

All of our projects LV cables are rated 1 KV!! lol!!

 

[Marvo]

Okay, okay, easy chaps... we also run 1kV under low voltage regs. I'm sure we're not to a volt or two amongst friends

 

[Knobhead]

All the cables I used were 600/1000 but I wouldn't go shoving 1000V down them.

 

[DPG]

Well mate you,ve disappointed me!we are all taking the mick in a roundabout way and then you come on and don,t even mention earthing.how disapointing lol.

Playground - roundabout way. I take it you intended that one! Daz

 

[Energetic]

Glad you've all amused yourselves for a bit, I've been out and about but enjoying the responses as they came in

It all seemed a bit dubious to me so thought i'd ask some proper sparks. First venture out of the sun lounge for a while... Cold out here...

It is for a school so they are pretty sensitive to price, perhaps need 50 or so small spades or an army of dads...

 

[Knobhead]

I'm afraid you're stuck with digging.

BTW at 960V the volt drop would be 2%

 

[DPG]

33kV and lattice pylons - no digging that way either. Lattice, not lettuce. Daz.

 

[Knobhead]

Just spoken to Phil, how many pylons do you need? He's got a couple knocking about.