Method of, and apparatus for, inserting carrier frequency signal information onto distribution transformer primary winding

摘要: Power line carrier frequency signals are provided at a distribution transformer primary winding by controlled current injection onto the neutral and phase conductors of secondary circuit, with direction flow in each half being in-phase additive fashion. Apparatus for causing includes pair electronic control means supplying currents to windings an auxiliary having its coupled center tap local through band-stop filter remaining band-pass augmentation signal into transformer.