So I'm using a fluke 1777 at work. I'm collecting data on a big 480 motor at 46 amps. For the life of me know can not reproduce the power reading on this meterIt is saying that motor uses 2.3 kw on each phase at .17 of. I'm getting closer to 32kws! Even if I use that stupid low of m, I don't get 2.3 kwsWhat am I missing here? I'm starting to wonder if the other guy hooked it up right. I've never heard of a power fsct of .16! I've tried the star calculation in my uglies, online calculators, simple power equation for 3 phase.Shame there is not more documentation online of how to actually set this thing up or how the output calculates anything.
>>2889304>17 of.17 pf i mean
This is one of the phases. How the fuck are they getting about 2 kw?
pf of .17 is horrendous.you're using raw numbers instead of rms.instead of hanging out on 4chan, you should be trying to learn about apparent vs instantaneous power.https://www.electronicdesign.com/markets/energy/article/21801657/whats-the-difference-between-watts-and-volt-amperes
>>2889355Surprisingly that is rms. If you have it apit out and excel file, it labels thst 480 as average voltage rms phase to phase.
Guess this is why factoey electricians make so much money. Ac power can be some weird bullshit
>we>at workThen what are you asking a diy board for? Learn how to do your job.
>>2889357It says that 476 is peak to peak voltage, which would mean the peak would be at 238 volts, which would mean that rms voltage would be 168 volts
>>2889309>>2889446Just a clueless feggit speaking but might there be some kind of control unit that messes the readings due to the meter being configured for (or exclusively built for/only capable of) measuring the motor in some other control scheme or even just in the absence of one?Maybe some kind of VFD is messing with it?
>>2889309>This is one of the phases. How the fuck are they getting about 2 kw?12.73 kVA * 0.17 pf = 2.16 kWLooks like this is kVA and power for one phase (L12). For a balanced three phase supply and load, you should be seeing about 38.6 kVA
>>2889355>pf of .17 is horrendousYeah. Either an unloaded motor. Or check the phasing of your current probes (CTs).
>>2889482Kind of circular logic though, given that pf is defined by the ratio of kw/kva. How are they getting that kva and kw with that current and p to p voltage?
>>2889618pf is the cosine of the angular diff between e and i. jfc op use a cap ffs or a vfd
>>2889304what does says the specs plate of the motor?>phase motors>that motor which one? provide a schematic about the circuit you are working and how many motor, hor are connected and all that bullshit usually needed.These power factor is wrong. If that would be real, these unit should have gone off line a long time ago.
>>2889618real power is A-Bnot sure about reactive and apparent, since they have to add up pythagoraticallyapparent might be A+Band reactive just B?been a while since i did this
Real power is when electroc tension and current are in phase. This happens with resistors. This does not happen in purely inductive things like coils where electrical tension and current have 90degree phase difference
