Large industrial installation query

[sparkyork]

yeah i can see the bends in the corner and the offset going into the box, but you never know the full story, you can try and plan everything to the last mm/wire etc, but what happens if you install all this and then client says oh i need this as well etc etc, that offset going into the box could of been totally unavoidable under certain customer fault conditions!!

 

[benji]

just look at them gorgeous colours it brings tears to your eyes,but arn't the phases crossed

 

[piggyitm]

Ha....Made you look,made you stare.......!

 

[wayne]

Hello,

I'm a first time poster and someone with only a little electrical knowledge. I am certainly not an electrician. So why am i posting here? Well, i / we looking at starting up a new business and one of the pieces of equipment that we're looking to have installed is a bloody big furnace. My various googling brought me in here so i thought i'd try my luck!

We are currently putting together the business plan and costings involved. One of the problems we have come across is finding an industrial unit with what i think is the required incoming power supply. I stress the "i think" part.

This bloody big furnace has a 900kW heater and 2x280kW blowers (1460kW). If my reading has been in any way shape or form accurate then we'd be looking at having a supply in the region of ~1700kVA allowing for a power factor of 0.85 to get this bad boy started. My assumption is that once running and at operating temp the power requirements would drop considerably. Currently we can't find any units with even a quarter of that. Plus all the other electrical equipment we'd have installed.

Can we really be looking at a supply in that order of magnitude, and do they even exist without being installed to order at massive cost?? I've requested more accurate power requirements from the manufacturer of the furnace but no luck so far.

I suppose at this point i should give the masses the opportunity to tell me to sod off and stop polluting the board with my rubbish!! I won't be offended, i recognise this is a one way flow of information as i have nothing to contribute to the board!

Thanks (?) in advance,
Mark

just to get this back on track
surely the 1.7 figure is across all three phases ?.wouldnt you need to divide it across the phases for an accurate measurement of power required

 

[wattsup]

but arn't the phases crossed<<<
Nope, they look reversed but they aint. Big mistakes have been made ryb on looking from front, but they connect byr at rear, like a mirror image. Big mistakes by me in the past - but it only took 4 hours or so to put them right...no damage done.

Talking about bends, worked at Aldermaston when built, I guy there went round with a template to check on all micc bends, some big stuff as well...i real pain, all bends had to have exact same form, I only had to alter about 2 of mine, thinking about it I only did two -

 

[benji]

yeah but i think your looking at the secondary side which should be R-Y-B right to left as per markings a/b/c right to left

SEC PRI
? R(c) B
Y(b) Y
? B(a) R

yours benji

 

[jibspark]

i would certainly do what was advised earlier and find out if that sort of demand can be met in your area. i would also double check your calcs as 17kv just seems massive, mind you i dont have any experience in HV so it would seem big!