So we have either
"9+3" : 9/9 * 300W + 3/9 * R2 = (770W - 65W) giving R2 =
1215W and maximum power at "9+9" is 1515W
"3+9" : 3/9 * 300W + 9/9 * R2 = (770W - 65W) giving R2 =
605W and maximum power at "9+9" is 905W
If we could trace the cables then we could pick the right one.
Or just take the average -- R2 = 910W and round it up to 1KW
The above makes no sense to me. Resistor wattage ratings are merely
the maximum wattage that can be put though them without the
expectation they will be destroyed. The power ratings are not used to
compute the power or current through them. If you put 600 W through a
300 W resistor you can expect it to soon burn out.
That was just a first-order calculation. I presumed the maximum wattages are for the same input voltages.
You can do the whole V=IR foo if you want to, but you don't know the voltages applied to the resistors or the resistor values themselves.
- Gee, if choppers are used this creates transients in the input, and invalidates the use of ordinary current meters or power meters.
The current meters in the experiments were on the mains-side of the control box.
At 01:12 PM 9/2/2011, Susan Gipp wrote:
The dimmers are commercial ones from an Italian manifacturer. Here the specs
http://www.gsei.it/attachs/P020_01.pdf
In Italian sorry. Try google translator.
Thanks.
TECHNICAL DATA 10 / 20 Amp:
* RANGE: 0 - 100% 20 Steps. CURRENT linearization.
SAVE SETUP TO E2PROM.
* BREAKING LOAD ALARM / FUSE SEMICONDUCTOR AND WITH CONTACT
N.a. 48V 1A AC / DC. TIME RESPONSE FROM EVENT 200mS.
(Appears only point on the display).
PHASE-ANGLE:
200mS * SOFT START AND AUTO SOFT START FOR LACK OF TEMPORARY
LINE VOLTAGE AND POWER TOOL.
ZERO-CROSSING FAST With preheating:
* SOFT START PHASE ANGLE, MAINTENANCE AND PASSAGE FOR 5 Sec
ZERO CROSSING WITH FAST CYCLE TIME 400ms.
Hmmm .... 0 - 100% 20 Steps. (But it only displays one digit?)
"Zero crossing" and "CURRENT linearization" implies it's not simple chopper
