The General Electric Multilin UR 9UH is a high-performance CPU module designed for the Universal Relay (UR) platform. It functions as the central processing engine for the relay, executing critical protection logic, control functions, and monitoring routines essential for power system automation and protection.

Features

• Core processing engine for UR Series relays, supporting complex protection algorithms for generators, transformers, motors, and transmission lines.
• Integrated communication suite including one 10/100 Base-T Ethernet port (RJ45), two 100 Base-FX fiber optic ports (LC connector, multimode 1310 nm), and one RS485 serial port.
• Supports advanced industry protocols: IEC 61850, DNP3, Modbus RTU/TCP, and IEEE C37.118 synchrophasors.
• Enables high-speed network redundancy via Parallel Redundancy Protocol (PRP) and precise time synchronization using IEEE 1588 PTP (accuracy up to 1 microsecond).
• Equipped with a 1 GHz embedded processor, 512 MB RAM, and 1 GB flash storage for deterministic real-time data processing.

Applications

• Generator Protection: Monitoring voltage, frequency, and current for medium to large-scale generators.
• Transmission Line Management: Providing distance and differential protection for grid stability.
• Transformer and Motor Protection: Implementing thermal modeling and fault detection.
• Substation Automation: Facilitating high-speed SCADA/DCS integration and centralized breaker control.

Technical Specifications

Installation Guidelines

• The UR 9UH is a modular component intended for rack mounting within the standard UR relay chassis.
• Ensure the relay is fully powered down before inserting or removing the CPU module to prevent electrical damage.
• Verify that the input voltage matches the specific relay configuration requirements.
• Maintain proper grounding of the chassis to ensure electromagnetic compatibility and operator safety.
• Configuration and setpoint management are conducted via the EnerVista Launchpad software suite.

FAQ

What is the primary function of the UR9UH module?

The UR9UH acts as the central processing unit (CPU) for the Universal Relay platform. It manages the relay's internal logic, executes protection algorithms, and handles multi-protocol communication for substation automation.

Does this module support IEC 61850?

Yes, the UR9UH supports advanced communication protocols including IEC 61850, DNP3, and Modbus TCP/RTU.

Is this module compatible with older UR relay hardware?

The UR9UH is designed to maintain compatibility within the Universal Relay (UR) family, supporting various models such as the D60, F60, G60, and L90.