The GE Multilin UR6TH is a specialized hardware module designed for the Universal Relay (UR) family, a flagship series of protection and control devices for high-voltage power systems. The UR6TH specifically functions as a Dual 100Base-FX (Fiber Optic) Ethernet communication module with integrated I/O capabilities. In a digital substation environment, this module allows the UR-series device (such as the C60, G60, or D60) to communicate via high-speed fiber networks while simultaneously managing localized contact inputs and outputs.
Key Product Specifications
- Part Number: UR6TH
- System Platform: GE Multilin Universal Relay (UR) Series
- Communication Interface: Dual 100Base-FX Fiber Optic Ethernet
- Fiber Connector Type: Multimode ST (Standard) or LC connectors (depending on sub-configuration)
- I/O Configuration: Typically features 8 contact inputs and 8 form-C (changeover) relay outputs
- Protocols Supported: IEC 61850 (MMS & GOOSE), Modbus TCP/IP, DNP 3.0, PTP (Precision Time Protocol)
- Redundancy Support: Compatible with PRP (Parallel Redundancy Protocol) and HSR (High-availability Seamless Redundancy)
- Dimensions: 190 mm x 110 mm x 25 mm (Standard UR slide-in module)
- Weight: 0.55 kg
Application Fields
The UR6TH module is essential for modernizing power grid communication:
- Digital Substations: Facilitating high-speed GOOSE (Generic Object Oriented Substation Events) messaging for peer-to-peer protection.
- Generator Protection: Providing a redundant communication path for G60 relays in power plant control rooms.
- Transmission Line Differential: Linking D60 relays across long distances via fiber optic cables for synchronized differential protection.
- SCADA Integration: Acting as the primary data gateway for transmitting voltage, current, and status data to a central energy management system (EMS).
Usage & Installation Instructions
- Module Insertion: Power down the UR chassis. Slide the UR6TH module into the designated slot (usually Slot F, G, or H depending on the chassis configuration). Ensure the module is seated firmly into the backplane.
- Fiber Connectivity: Remove the dust caps from the 100Base-FX ports. Insert the fiber optic cables until they click. Ensure the transmit (TX) and receive (RX) lines are correctly oriented to match the network switch configuration.
- Firmware Alignment: The UR6TH module must be compatible with the base unit’s firmware version. Use the EnerVista UR Setup software to verify that the hardware is recognized and that the communication settings (IP address, subnet, and MAC) are correctly mapped.
- I/O Mapping: Wire the field contacts to the terminal block. Configure the internal logic using the software to assign physical inputs to specific protection elements or status reporting.
Q&A – Frequently Asked Questions
Q: What is the advantage of using fiber (100Base-FX) over standard copper Ethernet? A: Fiber optics are immune to electromagnetic interference (EMI) and radio frequency interference (RFI), which are prevalent in high-voltage substation environments. They also provide electrical isolation between the relay and the network switch.
Q: Can I use the UR6TH for redundant communication? A: Yes. The dual-port design is specifically intended for network redundancy. It supports various architectures, including failover rings and the more advanced PRP/HSR protocols, ensuring that a single fiber break does not result in a loss of protection.
Q: Is the UR6TH hot-swappable? A: No. While the UR chassis is modular, you must remove power from the relay before installing or removing any hardware modules to prevent damage to the backplane or the module’s logic circuits.
Product News: Strengthening Substation Connectivity
The GE Multilin UR6TH continues to be a top-tier choice for utility operators transitioning to IEC 61850 standards. As power grids become more decentralized with the addition of renewable energy sources, the high-speed data throughput provided by the UR6TH is critical for maintaining stability. Recent updates to the UR platform firmware have enhanced the UR6TH’s ability to process “Heavy Traffic” GOOSE messages, reducing latency and improving the overall safety margin of the protection scheme. This makes the UR6TH a future-proof investment for facilities looking to integrate advanced grid diagnostics and real-time monitoring into their existing GE Multilin infrastructure.
