The Leakage Current RF Monitors by EPRI are advanced devices designed to measure and monitor leakage currents across various types of insulators, including long rod, composite, substation post, glass, and porcelain disc insulators. These monitors are robust, low-cost, and patented, featuring a wireless communication system that transmits data to a base station for aggregation, storage, and further transmission.

The monitors use a ferrous current transformer to measure the current, enhancing resiliency during flashover events and reducing impedance. They continuously monitor leakage currents, storing peak values over adjustable periods. The system supports secure, two-way communication for remote adjustments and automatic calibration, ensuring accurate and uninterrupted monitoring. Data is wirelessly transmitted to a base station, which can handle up to 48 monitors and also measures environmental parameters.