4 Feb
2011
4 Feb
'11
11:03 a.m.
Philip Belben <philip at axeside.co.uk> writes:
Remember that it's three phase with a 2pi/3 phase difference. Your
calculations are only correct if we were considering three separate
single-phase supplies: 3*240*16=11.5kW and 3*240*25=18kW respectively.
If we consider a resistive load in a delta connection, which is the case
in a typical Swedish electrically heated house with 380V (the voltage
between two phases) radiators, the maximum power available is
sqrt(3)*380*16*3=32kW and 49kW respectively.
Regards,
--Frej
> Swedish
houses have electric heating, run off 3-phase. A house will have
> at least 16A, sometimes 25A meter fuses; Sweden is quite cold in winter.
Are you sure? 16A 3 phase is only 11kW, 25A 18kW. I would expect 60A
or 100A fuses.