7a604b23_agement_and_Telecommunications_Glossary_Definition
[Term] Power line carrier system [Definition] 
A system employing radio frequencies used by an electric power utility company on AC transmission lines for protective relaying, telemetry, etc., for general supervision of the power system. It excludes the electric lines which connect the distribution transformer to the customer’s premises.
RSS-Gen — General Requirements for Compliance of Radio Apparatus - Spectrum Management and Telecommunications