kW Line Losses Metered?
kW Line Losses Metered?
(OP)
This may sound a little stupid but I was just wondering if the kW losses (due to I^R) is also metered by the kWHour meter. I believe that the kWHour meter can see this but unfortunately it cannot distinguish between losses and useful power.






RE: kW Line Losses Metered?
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If we learn from our mistakes I'm getting a great education!
RE: kW Line Losses Metered?
Regards
Marmite
RE: kW Line Losses Metered?
RE: kW Line Losses Metered?
RE: kW Line Losses Metered?
Regards,
H. Bronzeado
RE: kW Line Losses Metered?
As rcwilson saied, high class meters can calculated line and transformer losses. You can check meters, like to ION meters (PML in past, Schnieder today, please tech. note: http:
Best Regards.
Slava
RE: kW Line Losses Metered?
You cannot measure the losses upstream of the meter.
If you know the parameters, Resistive components, reactive components, transformer magnetizing currents, etc, you may CALCULATE the upstream losses. Some meters have an internal processor that is capable of doing these CALCULATIONS for you and then combining the results with the metered quantity. You must program into the meter the parameters needed to do the calculations.
Now the question becomes:
"Is METERING just MEASURING, or does it include the addition of CALCULATED amounts?"
I don't know.
Bill
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"Why not the best?"
Jimmy Carter
RE: kW Line Losses Metered?
I agree we must define the terms accurately, but the 2S meter does in fact "measure" upstream neutral losses. Blondel says we need 2 elements, but the 2S uses one thereby avoiding a neutral connection. Your statement works for Blondel compliant metering.
Consider a 120/240 volt source with lossless leg connections to the meter and load, and a 1 ohm resistive neutral connection to the load. Load on L1 circuit is 1 ohm resistive, open circuit on L2. Current on L1 and neutral is 60 A. Power dissipated by load is 3600 W. Power dissipated in the neutral resistive connection is 3600 W. Meter sees 240 V and the average of L1 and L2 (30 A) and measures 7200 Wh in an hour's time.