3 phase meter

[dingledong]

A building has 1 3 phase thing in it and 3 fuse boards single phase 1 to each phase but they are going to turn of one board for about a year . How will this affect the readings as in bills
How does a 3 phase meter work

 

[shanky887614]

A building has 1 3 phase thing in it and 3 fuse boards single phase 1 to each phase but they are going to turn of one board for about a year . How will this affect the readings as in bills
How does a 3 phase meter work

when 3p is used the excess current goes down the phases.

on single phase it goes down the neutrel

in otherwords there wont be any strange readings just a lower demand for a while

 

[elliot123]

would this not unbalance the phases? not a 100% sure but i thought ideally you try load each of the phases the same

 

[dingledong]

So A 3 phase bill is not £x per phase . It's just a total bill then

 

[dingledong]

would this not unbalance the phases? not a 100% sure but i thought ideally you try load each of the phases the same

Yes it will unbalance as one phase will hardly be used ! The only thing that's 3 phase is a cooker I think . So even when that's used it will always be unbalanced

 

[Silly Sausage]

when 3p is used the excess current goes down the phases.

Do what???????

With or without a Neutral?
Do some reading up on unbalanced Stars with missing Neutral!

 

[shanky887614]

Do what???????

With or without a Neutral?
Do some reading up on unbalanced Stars with missing Neutral!

a n is not always needed especially when the 3p equipment uses delta.

what im saying is it doesnt need a n to moniter usage

 

[Knobhead]

I[SUB]n[/SUB] = √((I[SUB]a[/SUB]²+I[SUB]b[/SUB]²+I[SUB]c[/SUB]²)-((I[SUB]a[/SUB]*I[SUB]b[/SUB])+(I[SUB]a[/SUB]*I[SUB]c[/SUB])+(I[SUB]b[/SUB]*I[SUB]c[/SUB])))

 

[Simonslimline]

when 3p is used the excess current goes down the phases.

on single phase it goes down the neutrel

in otherwords there wont be any strange readings just a lower demand for a while

So what happens on a TPN supply with unbalanced loading on the phases!

 

[Knobhead]

I am not going in to effect of a broken neutral on a star system. The voltage/current vector diagrams are interesting but not easy to explain.

Added to which the OP could ask me a question but as he’s on my ignore list it could prove difficult.

 

[shanky887614]

So what happens on a TPN supply with unbalanced loading on the phases!

no difference at the meter.

all he is asking is if it would affect the readings and as the supply is monitered of course it wont affect it

 

[Simonslimline]

Impact of Floating Neutral in Power Distribution | Electrical Notes & Articles

 

[Silly Sausage]

Impact of Floating Neutral in Power Distribution | Electrical Notes & Articles

This has given me idea for the next prize in the Trainees bit, if Paul ever gets round to awarding the current ones!

 

[Simonslimline]

This has given me idea for the next prize in the Trainees bit, if Paul ever gets round to awarding the current ones!

We are waiting on more entries at the moment. I have made a thread in the new members section trying to lure them in.

 

[shanky887614]

We are waiting on more entries at the moment. I have made a thread in the new members section trying to lure them in.

anything interesting in the trainee section atm?