Re: Input power measurement - Modifying Power Meters

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <teslalist-at-qwest-dot-net>" <davep-at-quik-dot-com>


>I have no clue how these things work,

         I do, in theory.

>but if they use a current transformer to sense current,

         The usual household size does not, simply
         a loop carrying the load current.

>you can can multiply the number of turns of your power

>wire through this transformer to increase the
>current.
         Or, as noted, make a current transformer.

         The trick is to get good accuracy.

         The current transformer needs a coil, needs

         calibration.  (or, rather, calibrate the
         assembly, the 'whole thing: kwh meter plus
         transformer.)


>For example, if you had a single turn on a current

>transformer and the meter was only reading 1A, if you

>modified this to have 10 turns on the current transformer,

>the meter would then read 10A.
         It reads KWH, tho your point is plain.


         Need to do some math and time for 10 seconds, then.
         Modifying the drag magnet is possible, but would
         need recalibration after.

         best
         dwp

...the net of a million lies...
         Vernor Vinge
There are Many Web Sites which Say Many Things.
         -me