watt-hour metering

Discussion in 'Prime Plug-in Charging' started by Old Bear, Oct 19, 2017.

  1. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    13,099
    6,628
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    To do it right, you are not missing anything. It takes two current sensors, one on each hot side of the split-phase system.

    But wiring all the 'hots' through a single sensor core, as shown in McRascal's diagram (one phase straight, opposite phase reversed) should work as a reasonable 'kinda-sorta' approximation in most cases. It would be just fine if the supply was perfectly clean and balanced, but that isn't the real world. Ordinary impedance and mismatch issues will make it susceptible to interference from other unmonitored loads on the same local transformer, but may be close enough for coarse approximations and monitoring.

    On three phase systems, this approximation completely falls apart.

    Posted via the PriusChat mobile app.
     
  2. mveras1972

    mveras1972 Member

    Joined:
    May 23, 2019
    134
    46
    3
    Location:
    New Philachussetts
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I am installing a 20A Z-Wave outlet which can monitor power and energy and send that info to my SmartThings which I can view in my iPhone. Just another way to monitor power.
     
  3. jb in NE

    jb in NE Senior Member

    Joined:
    Apr 13, 2018
    2,235
    1,568
    0
    Location:
    Nebraska
    Vehicle:
    2018 Prius Prime
    Model:
    Prime Premium
    Which make/model are you using?
     
  4. mveras1972

    mveras1972 Member

    Joined:
    May 23, 2019
    134
    46
    3
    Location:
    New Philachussetts
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    Enerwave ZW20RM Wireless Z-wave In-Wall Smart Meter Energy Monitor TR Duplex Receptacle,120VAC, 20Amp
     
    jb in NE likes this.
Loading...