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GE Multilin Universal Relay CPU Module
featuring native PRP redundancy
IEEE 1588 time sync, and concurrent IEC 61850 GOOSE
Modbus TCP/IP, and DNP 3.0 support
The UR9GH is a central CPU module within the GE Multilin Universal Relay platform, serving as the primary computational hub of the UR chassis. It houses the core processor responsible for running high-speed protection algorithms, executing complex control logic, and capturing transient oscillography alongside sequence-of-events logs. For industrial network connectivity, the 9G variant provides an RS485 serial interface with a single 10Base-F fiber optic Ethernet channel, while the 9H variant upgrades the topology to redundant 10Base-F fiber optic networks, both offering native interoperability for substation automation protocols including IEC 61850, Modbus TCP/IP, and DNP 3.0. This field-replaceable hardware unit delivers asset protection and grid operational stability across global infrastructure networks.
High-performance processing
Flexible communication options
User-friendly configuration
The UR9GH CPU Module is a field-replaceable hardware component within the GE Multilin UR series, functioning as the main processing unit for multiple asset protection units, such as the G60 Generator Protection, T60 Transformer Protection, B90 Bus Protection, and F60 Feeder Management Relays. This module is utilized across infrastructure sectors, including power generation plants, heavy industrial facilities, petrochemical refineries, and high-voltage transmission substations.
Through the EnerVista UR software interface, the UR9GH executes remote configurations, implements operational logic, and provides detailed fault diagnostics through oscillography and event logs. The UR9GH processor serves as a spare part to minimize unexpected industrial downtime, and acts as a replacement component for upgrading legacy UR relay sub-systems to Ethernet-based networks, ensuring asset protection and grid operational stability.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
General Electric UR9GH CPU Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in t330101-00-16-10-01-05n.
Thermal Power Generation and Cogeneration
Functions as the core CPU within generator protection relays to monitor stator ground faults, reverse power, and loss-of-step conditions, executing millisecond-level safe tripping isolation during electrical faults in generator blocks.
Hydroelectric Power Plants
Deployed inside the electrical control panels of large hydro-generator sets to calculate negative-sequence currents and overspeed overvoltage parameters, instantaneously routing trip commands to breakers via onboard IEC 61850 GOOSE fast messaging.
Nuclear Power Plants
Mounted within plant electrical distribution networks and safety-grade power cabinets of nuclear facilities, utilizing microsecond IEEE 1588 time synchronization protocols to provide absolute chronological alignment for plant-wide transient fault recordings.
Petrochemicals and Large-Scale Refining
Operates within dedicated protection devices for large synchronous motors in petrochemical plants to monitor high-risk electrical faults like overloading and broken rotor bars, preventing unexpected process production shutdowns.
Modern Mining and Heavy-Duty Hoists
Serves within protection units of high-voltage power networks for massive open-pit mines and underground deep central substations; its ruggedized hardware resists thermal brittle cracking under ambient mining variations from -40°C to +60°C.
Wind Power and Offshore Wind Farms
Deployed inside offshore wind farm collector substations and onshore wind collection line protection racks to receive reactive and active power currents from tower-side converters, executing rapid location and lockout during single-phase ground faults on submarine or underground cables.
When maintaining the UR9GH processor module, physical insertion and removal must only be performed after completely isolating the chassis power, as hot-swapping is strictly prohibited to prevent damage to sensitive electronic components and gold fingers. Before replacing or upgrading the module, use EnerVista software to perform a complete backup of the original device's configuration files and firmware versions; the order code of the new board must match the original exactly. During routine operations, regularly monitor the "READY" and "CRITICAL FAIL" indicators on the front panel, and leverage its dual-network PRP architecture and IEEE 1588 protocol to guarantee absolute continuity of substation communication and time synchronization. In the event of a critical hardware fault trigger, blind operation is strictly forbidden, and the entire module must be reported immediately and replaced as a unit.
Alternative Names
Alternative Names
UR-9GHUR 9GH
Technical notes
Technical notes
The UR9GH is an advanced central processor module designed under the 9G hardware architecture for the GE Multilin Universal Relay portfolio, encompassing platforms such as the F60, B90, T60, and G60. Operating as the primary computational and control engine of the Intelligent Electronic Device, this component is deployed within primary electrical enclosures of power plant generator-transformer blocks, EHV substation automation systems, and critical industrial distribution grids. It manages localized high-speed protection algorithm execution, real-time transient fault recording (oscillography) capture, and full-scale industrial network data routing and secure interface interfacing, rather than processing direct analog AC/DC sampling.
The GE UR9GH is the core processor module for GE Multilin Universal Relays (UR series). It executes protection algorithms, processes data, and manages communications for the entire relay system.
What is the primary function of the UR9GH module in a relay?
It serves as the "brain" of the relay, running the firmware, calculating power grid measurements, triggering logic controls, and driving protection outputs.
How do you use the UR9GH module in an industrial system?
Users insert the UR9GH into the designated slot of a GE UR series chassis, connect communication cables, and configure parameters or upgrade firmware using Enervista software.
What communication interfaces does the UR9GH module support?
It typically integrates multiple communication interfaces, including RS232/RS485 serial ports for local connection, and RJ45 Industrial Ethernet or fiber optic ports for networking.
Why is UR9GH so critical in power grid protection?
Because it provides high-speed data processing capabilities, ensuring the relay can react and trip within milliseconds during grid faults like short circuits.
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