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Induction watthour meter for power systems transmitting carrier communication signals

  • US 3,925,728 A
  • Filed: 02/21/1974
  • Issued: 12/09/1975
  • Est. Priority Date: 02/21/1974
  • Status: Expired due to Term
First Claim
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1. An induction watthour meter for power systems transmitting carrier cOmmunication signals, comprising:

  • an electromagnetic assembly including a voltage magnetic section having stator core made of a ferrite magnetic material and a current magnetic section having stator core made of a ferrite magnetic material;

    a voltage metering coil on said stator core of said voltage magnetic section; and

    a current metering coil on said stator core of said current magnetic section so as to define a metering circuit including said voltage and current metering coils connectable to power line conductors of a power system for measuring the consumption of electrical energy of a customer electric load with said power line conductors transmitting high frequency carrier signals of a communication system connected to said power system;

    a terminating impedance network including said current metering coil and a capacitor element connected together to define a parallel resonant circuit tuned to said carrier signals such that said resonant circuit presents a predetermined value of impedance that is higher than the impedance of said customer electric load to said carrier signals when occurring in the same power line conductors supplying the electrical energy to the customer load.

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