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 device measures leakage current using a high wattage shunt resistor, enhancing resiliency of the device during flashover events and reducing impedance. It continuously monitors both AC and DC leakage current, storing peak values over adjustable periods. The system features a secure, two-way communication protocol for remote adjustments. The monitors are designed for easy installation at the grounded end of insulators, with different attachment methods for various insulator types. Data is wirelessly transmitted to a base station, which can handle up to 48 monitors and also measures environmental parameters.