still need answer please

[sparkyblue1]

Am i right in thinking a 600 KVA 3 phase supply is approx 1400 amps per phase.

Read more: http://www.electriciansforums.net/e...electrical-forum/67069-kva.html#ixzz2BMgYxgmu

 

[stef]

I am sorry, maybe it is me and my old age and I haven't had my pint ... but I still get only 850A. What am I missing? Help, maths re-sit...

 

[telectrix]

867 on my abacus, using 400V and no pf corrections.

 

[sparkyblue1]

looks like my little calculator is dead cheers chaps

 

[telectrix]

it's not the calculator at fault. it's the fingers pressing the buttons. :86:

 

[sparkyblue1]

ooooooh just cos i'm getting on a bit means doesn't what don't know doin lol:stupid:

 

[ackbarthestar]

it's not the calculator at fault. it's the fingers pressing the buttons. :86:

Try it while wearing mittens !

Supply current in the conductors = 600k/(400 * 1.732) = 867A or if you like 600k/(415 * 1.732) = 835A

However, you will not be able to use all this since you will need to factor in pf

 

[Knobhead]

Be fore you all get caried away have a look at the voltage on this 500KVA unit

 

[Rockingit]

Before you all get caried away have a look at the voltage on this 500KVA unit

Go on then........ why?

 

[Knobhead]

99% of tramsformer output voltages aren't what the IEE tell you, IE 400V nor is it the fabled 415. 433V is normal.

 

[bomjac]

99% of tramsformer output voltages aren't what the IEE tell you, IE 400V nor is it the fabled 415. 433V is normal.

Which is why my house runs at 248V and blows light bulbs like nobodies business. Goddamn DNO's too lazy to drop their volts to the new values.

 

[telectrix]

now this is where a v phase unit might be of some use.

 

[bomjac]

now this is where a v phase unit might be of some use.

Maybe, but 3kW is 3kW no matter what voltage it is on, the biggest consumers in my house are the Tumble dryer, the Dishwasher, washing machine and oven. Nothing to be gained from these by voltage optimisation. Living room and dining room have 6*50W halogens on dimmers between them, all other bulbs are miniature fluorescents or LED's, so I think I shall just have to live with replacing the G9's when they blow.

 

[cantabrian9]

Which is why my house runs at 248V and blows light bulbs like nobodies business. Goddamn DNO's too lazy to drop their volts to the new values.

Bulbs are planted in the GROUND ! Lamps go in electrical fittings !!!!

 

[Engineer54]

Maybe, but 3kW is 3kW no matter what voltage it is on, the biggest consumers in my house are the Tumble dryer, the Dishwasher, washing machine and oven. Nothing to be gained from these by voltage optimisation. Living room and dining room have 6*50W halogens on dimmers between them, all other bulbs are miniature fluorescents or LED's, so I think I shall just have to live with replacing the G9's when they blow.

Now that's not quite the case at all, ...is it!!! If it was, there wouldn't be any kind of voltage optimisers. Where/how do you think they get the savings from??

now this is where a v phase unit might be of some use.

NO, those things are definitly a total waste of time and money!! lol!!!