Hello to all,
short intro: I'm from Belgium (so please forgive any spelling/grammar mistakes), I used to do fault-finding on cnc-machinery (both software as hardware), now I'm (again) into a whole new professional world, I like to get some change of environment every few years.
Currently I'm having a bit of a discussion with a friend, as described below:
Our (street-) power supply is from a transformer, secondary in Y, with the neutral (star-point) earthed to ground. Voltage is 3x400 V, or 230V for each neutral-phase voltage.
If you would hook up a large transformer (eg an industrial welder) between 2 phases (400V), Would it, or would it not, affect the grid?
Theoretical question, I know if any difference, it would be very small, but imagine quite a large transformer then.
More specific, if you would hook up a perfect symmetric 3phase resistor in Y between the phases from that grid, would you see a voltage difference between the starpoint of the Y-resistor (which is floating at this instant) and the starpoint of the grid (where it is asymetrically challenged due to the large welder)?
Now, both of us have a good understanding of electrics, and yet neither of us can deliver sufficient proof to the other one to help him convince for either situation.
I say yes, it would affect the grid, he says it wouldn't, but neither of us can really back it up.
I was pointed forward to here from another forum, If this isn't the right place to ask please let me know...
Many thanks in advance...
short intro: I'm from Belgium (so please forgive any spelling/grammar mistakes), I used to do fault-finding on cnc-machinery (both software as hardware), now I'm (again) into a whole new professional world, I like to get some change of environment every few years.
Currently I'm having a bit of a discussion with a friend, as described below:
Our (street-) power supply is from a transformer, secondary in Y, with the neutral (star-point) earthed to ground. Voltage is 3x400 V, or 230V for each neutral-phase voltage.
If you would hook up a large transformer (eg an industrial welder) between 2 phases (400V), Would it, or would it not, affect the grid?
Theoretical question, I know if any difference, it would be very small, but imagine quite a large transformer then.
More specific, if you would hook up a perfect symmetric 3phase resistor in Y between the phases from that grid, would you see a voltage difference between the starpoint of the Y-resistor (which is floating at this instant) and the starpoint of the grid (where it is asymetrically challenged due to the large welder)?
Now, both of us have a good understanding of electrics, and yet neither of us can deliver sufficient proof to the other one to help him convince for either situation.
I say yes, it would affect the grid, he says it wouldn't, but neither of us can really back it up.
I was pointed forward to here from another forum, If this isn't the right place to ask please let me know...
Many thanks in advance...