On Tuesday 20 April 2004 02:06 pm, Stefan Trethan wrote:
the power company meters have a aluminium disk and 2 coils, one for
voltage and one for current. (i reckon a 3 phase unit has 6 coils).
this ensures that really the power is measured. the fields somehow
multiply to generate the torque. (i don't know the details just now but
there are coils for voltage and current). at least this is how the european
power meters work.
The one we have here now is like that. The one where we used to live was
electronic, sort of. The display, instead of being the usual mechanical
stuff, was a small LCD panel which would sequence through a number of
different things, cumulative and otherwise. That gave that particular power
company the ability to nail us for more money during "peak" hours vs.
"off-peak" hours and similar nonsense. I wasn't real happy about that.
