GE UR-9TH Central Processing Unit Module

Product Overview

The GE Multilin UR-9TH is a high-performance CPU Module designed to serve as the primary controller for the Universal Relay (UR) platform. As the "9" series processor, it handles all protection logic, high-speed calculations, and communication management for the relay. The "TH" variant is specifically engineered for high-availability networks, featuring support for the Parallel Redundancy Protocol (PRP). This allows for zero-delay recovery in the event of a network failure by transmitting data across two independent LANs simultaneously. With integrated IEEE 1588 support, the UR-9TH provides microsecond-accurate time synchronization, making it a cornerstone of modern digital substation architectures.

Technical Specifications

• Module Type: Central Processing Unit (CPU)

• Manufacturer: GE Multilin

• Manufacturing Location: Ontario, Canada

• Network Redundancy: Parallel Redundancy Protocol (PRP)

• Time Synchronization: IEEE 1588 (Precision Time Protocol)

• Software Support: EnerVista UR

• Diagnostic Features: Self-Assessment & Equipment Mismatch Testing

• Weight: Approx. 1lb, 10oz

Key Features and Engineering Advantages

• Seamless Network Recovery: By utilizing PRP, the UR-9TH duplicates every data frame and sends them over two distinct network paths. If one path fails, the destination receives the duplicate frame from the second path with zero switchover time.

• Microsecond Precision: The module supports the IEEE 1588 protocol, allowing the relay to synchronize with a Grandmaster clock to within one microsecond. This is critical for synchronized phasor measurements and accurate Sequence of Events (SOE) recording.

• Advanced Self-Diagnostics: The UR-9TH continuously performs self-tests. Error codes like WRONG TRANSCEIVER prevent hardware damage by ensuring SFP modules are compatible, while the Equipment Mismatch test ensures that the physical modules in the chassis match the programmed order code.

• High-Speed Logic Execution: The processor manages inputs from CT/VT modules and executes complex protection algorithms (like those found in the F35, B30, or T60) at sub-cycle speeds.

• Comprehensive Interface Support: The module manages communications with programming devices, local HMIs, and peer-to-peer inter-relay communications (GOOSE messaging) for coordinated protection schemes.