GE UR8LH is a CT/VT module in the Universal Relay product family developed by GE Multilin, a business unit of General Electric. It is primarily used in industrial power systems for current and voltage transformer (CT/VT) signal acquisition and diagnostics.

1. Key Technical Features

High-Accuracy Acquisition
The module provides 4 current transformer (CT) inputs and 4 voltage transformer (VT) inputs, converting high-voltage field current and voltage signals into low-level signals that can be safely processed by protection relays.

Enhanced Diagnostics
It incorporates advanced signal integrity verification functions to assess analog signal quality, ensuring the accuracy and reliability of measurement data.

High Compatibility
The UR8LH can be used to replace or upgrade existing Universal Relays (such as the UR series) or to add new functionality. It supports multiple communication protocols, including Modbus, PROFIBUS, and PROFINET.

2. Typical Application Scenarios

Power System Protection
In substations or power plants, it serves as a front-end voltage/current measurement module that supports downstream protection logic, such as overcurrent, undervoltage, and differential protection.

Industrial Automation
Suitable for environments with high reliability requirements—such as wind turbines, mining cranes, and remote SCADA nodes—ensuring stable monitoring and operation even under harsh conditions.

Summary

GE UR8LH is a highly reliable signal acquisition module specifically designed for power protection relays. Its core value lies in improving measurement accuracy while reducing fault risks through enhanced diagnostic capabilities.