No neutral on three phase

[magnoliafan89]

Hi all
Need some help remembering some college work.
Been doing a job and we are pulling in 400mm singles in parallel, got three phases and a seperate earth but no neutral.
From what i remember from college was it becuase if you had the phases all balanced youd have no current to go on a neutral so dont need one. I was trying to remember all those calculations and diagrams we did in college so i asked the bloke i was with to explain it to me so i could better understand but he said he couldn't remember either.
Is this why there is no neutral and it is as simple as the loads being balanced or was there another reason?

Thanks for any help guys hope you're all keeping busy

 

[ipf]

A machine that supposedly melts plastic.

Not much known about it, then?
Some form of extruder.....may be melting plastic for remoulding purposes? You don't just melt plastics, it's for a reason.
Still, with such a supply, it'll be big....if it's specifically for that purpose.
In such cases, though, it would have to be assumed that other local machines would be involved....for remoulding, at least.

 

[Squid]

.What is it feeding?.... one big panel with all control necessities involved, maybe?

Wales.......

 

[ipf]

Wales.......

You mean whales?

 

[Squid]

You mean whales?

Nope, the fat layabouts past Bristol I believe........

 

[magnoliafan89]

Not much known about it, then?
Some form of extruder.....may be melting plastic for remoulding purposes? You don't just melt plastics, it's for a reason.
Still, with such a supply, it'll be big....if it's specifically for that purpose.
In such cases, though, it would have to be assumed that other local machines would be involved....for remoulding, at least.

Yeh an extruder. I dont know much about the machine ive just seen the plans and came up midway through the job

 

[Mike Johnson]

Now your jogging the memory, isn't it something to do with the supply transformer being centre tapped to Earth, don't shoot the messenger I just pulled this out of a very thinning head, my brain hurts.