This manual introduces the main functions of Trench line traps, and the use of line traps to prevent carrier signals from being dissipated in the substation, carrier transmission path external fault or main transmission path branch.
Trench is a world leader in air‑core dry‑type inductors for electric utility applications. Their Line Traps are used in Power Line Carrier (PLC) communication systems to provide high impedance at carrier frequencies while allowing normal power‑frequency operation.
The product line includes two winding technologies (E‑design and O‑design), several tuning options (single‑frequency, double‑frequency, wideband, self‑tuned), metal‑oxide surge arresters for protection, and multiple mounting configurations such as suspension and pedestal mounts. Detailed ratings for continuous current, short‑time current, and inductance are provided for both IEC 353 and ANSI C93.3 standards.
It presents a high impedance at the carrier frequency band while introducing negligible impedance at the power frequency.
Trench offers single‑frequency, double‑frequency, wideband, and self‑tuned tuning options.
They are equipped with advanced metal‑oxide surge arresters rated at 10 kA discharge current.