The EPRI Insulator Leakage Current Monitor is a robust, low-cost device designed to measure leakage currents across various types of insulators, including long rod, composite, and glass or porcelain disc insulators. It addresses issues related to contamination, washing, and the degradation of polymers. The monitor wirelessly reports measurement data and status via a radio frequency (RF) link to a base station, which aggregates, stores, and transmits the data.

The device measures leakage current using a ferrous current transformer that surrounds a straight current conductor, enhancing resiliency during flashover events and reducing impedance. It continuously monitors leakage current, storing peak values over adjustable periods. The system features a secure, two-way communication protocol for remote adjustments and automatic calibration. The monitors are designed for easy installation at the grounded end of insulators, with different attachment methods for various insulator types.