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  1. M

    Currents on a three phase system

    I agree this is a complex matter. The point is, I have a professional power distribution meter that's giving me currents on L1, L2 and L3 (all positive) and kWh consumption on L1, L2 and L3. These current values are positive and not identical, so it pushed me to believe that somehow the currents...
  2. M

    Currents on a three phase system

    One more thing, regarding this point. What I meant was, what happens if I sum only the current values, without takng into account the phase shift, only the magnitudes. I mean, even if th system is perfectly balances and the neutral is zero, there's still current going in, right?
  3. M

    Currents on a three phase system

    Perfect, thanks.
  4. M

    Currents on a three phase system

    P1 = V1 x I1 P2 = V2 x I2 P3 = V3 x I3 Total power = P1 + P2 + P3 is this formula/approach correct?
  5. M

    Currents on a three phase system

    I'm reading that in order to calculate how much power the system is using you actually use all three phases: current L1 * voltage L1 +. ... + currentL3 * voltageL3 (the formula is more complex, but I'm interested only on the phases) so the currents in the single phases are relevant. Logically...
  6. M

    Currents on a three phase system

    The problem I'm having is this, the documentation of the device I'm monitoring is giving me "L1-N", "L2-N", "L3-N", and all three are positive values. Maybe I'm missing what the "-N" means here. That's why I wanted to know what would I be getting by adding them up. Additionally, the vector sum...
  7. M

    Currents on a three phase system

    Hi, thanks for answering. The neutral current, however, is a vector sum, am I correct? What if I sum L1 + L2 + L3, just the values?
  8. M

    Currents on a three phase system

    Hi everyone, is it possible to sum at any given moment in time L1 + L2 + L3, algebrically speaking? If so, what would this value represent? Thanks
  9. M

    Three Phase system question

    Guys, thanks to everyone for your help. I think, however, that you are giving me more information than what I really needed. The only thing I needed to know was wheter I could get a single amplerage value representing how much a three-phase system was consuming, and if this could be done as a...
  10. M

    Three Phase system question

    That's exactly what I have, in particular, the meters are Janitza.
  11. M

    Three Phase system question

    Perfect Baluncore, that's what I wanted to confirm. The problem I was facing is that some of the devices are three-phase while others aren't, so when I had to aggregate them (for example, see how much 2 single phase and 1 three phase were consuming), I couldn't just "sum" the current consumed...
  12. M

    Three Phase system question

    Ok, maybe I haven't been very clear. Right now, we are measuring current. The problem is, three-phase systems are giving either the single-phase amperage or the trigonometric sum, so we do not have a real value of how much current is actually going through. At this point, an idea came up: what...
  13. M

    Three Phase system question

    Thanks to everyone for the answers. I'm working with powerbars that measure current and energy consumption from datacenters (in particular, Janitza powerabars, three-phase system). My client would like to switch from current (which is currently measure as single phase or trigonometric sum) to...
  14. M

    Three Phase system question

    Hi both, thanks for answering. So what you're saying, Baluncore, is that attempting to measure the "current consumption" of a three phase system would be meaningless and would not indicate how much the system is consuming. Instead, a more meaningful value would be the power consumption of the...
  15. M

    Three Phase system question

    Hi everyone, I'm not an electrical engeneering nor do I have a significant background in the field. Right now I'm trying to monitor current consumption from three phase systems. My question is: is it possible to obtain the current consumption of the whole system as a function of the current...
  16. M

    Signal spreading in spread spectrum technology (DSSS)

    Ok, thanks for your help. I already read this (and many other) articles about DSSS. The only thing I didn't quite get was how the spectrum was actually spread by multiplying it with the PN sequence: now I get it, it's the PN sequence that has a large spectrum which get's carried to the...
  17. M

    Signal spreading in spread spectrum technology (DSSS)

    I'm sorry, what wiki article are you talking about? I can't see any link.
  18. M

    Signal spreading in spread spectrum technology (DSSS)

    So the wide spectrum is basically encoded in the sequence? E.g., 111111 would be a low frequency sequence while 10101010 a high frequency one? Do you mean the fact the sequence repeats itself in the time domain depending on the original data rate? Do you mean the spectral density of the...
  19. M

    Signal spreading in spread spectrum technology (DSSS)

    Hi, I've been trying to understand DSSS, but I'm not an engineer and have trouble with one point. I get the fact that multiplying the user signal with the chip sequence is what spreads the signal. My question is, why is this? If the data rate is, say, 1 bps, and the chip sequence 1000 bits...
  20. M

    Intensity and frequency of radio waves

    So is it logical to think that by increasing the frequency, the intensity at a distance A meters would be greater than with lower frequency?
  21. M

    Intensity and frequency of radio waves

    Hi, I am not a physicists and have been trying to understand some basic concepts about electromagnetic waves in the context of telecommunications. Now, this is what I know so far: the energy of electromagnetic waves is proportional to it's frequency (E = h*f), and basically it's the energy...
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