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- GE
- UR 9EH
- Universal Relay CPU Module
- USA
- 120 × 30 × 100 mm
- 0.75 kg
- Xiamen, China
- New & In Stock
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Product Overview
The GE UR 9EH is a Universal Relay CPU Module used in the GE Multilin UR Series modular protection platform. It provides the central processing layer that coordinates information from measurement and I/O modules with the configured protection, control, monitoring, and communication functions of the relay.
Within a typical UR Series installation, CT/VT modules acquire electrical measurements while digital and other I/O interfaces provide equipment status and control signals. The CPU processes this information according to the relay configuration and coordinates the corresponding protection decisions and output actions.
The CPU is therefore a system-level component rather than a dedicated field signal interface. When a relay experiences a broad range of abnormal behavior, technicians can use CPU status and diagnostic information together with the condition of the connected I/O and measurement modules to determine whether the problem is related to processing, configuration, communications, or an external signal path.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | UR 9EH |
| Product Type | Universal Relay CPU Module |
| Product Family | Multilin UR Series |
| Series | GE Multilin UR Series |
| Module Type | CPU / Processing Module |
| Processing Function | Relay Data Processing and Control |
| System Function | Protection, Control and Monitoring |
| Data Source | Relay Measurement and I/O Modules |
| Logic Function | Configured Protection and Control Logic |
| Communication Role | Relay System Communication Management |
| Application | Electrical Protection and Automation |
| System Integration | GE Multilin UR Protection Platform |
| Installation | Protection / Control Panel |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 0.75 kg |
Product Features
- Central relay processing coordinates information received from the UR Series measurement and I/O structure.
- Universal relay architecture supports the processing requirements of different electrical protection applications.
- Protection logic execution handles configured protection and control logic using available measurement and status information.
- System coordination links measurement acquisition, protection decisions, control outputs, and monitoring functions.
- Diagnostic support provides system-level information useful during commissioning and maintenance.
- Communication coordination supports the exchange of relay information with connected engineering, monitoring, and control systems.
- Modular construction allows CPU processing to be separated from dedicated CT/VT and I/O interface functions.
Working Principle
The GE UR 9EH operates as the central processing element of the Multilin UR Series relay architecture. It receives information from the relay’s measurement and I/O modules, executes configured logic, and coordinates the appropriate system response.
1. Measurement and status input
CT/VT modules and other I/O hardware provide electrical measurements, equipment status, and other information to the relay architecture. These signals form the data used by the CPU.
2. Data processing
The CPU processes incoming information according to the configured relay application. It evaluates measurements and status changes against the logic associated with the installed protection functions.
3. Protection logic
Configured protection functions use the processed data to determine whether the electrical conditions meet their operating criteria. The CPU coordinates these functions as part of the overall relay architecture.
4. Output coordination
When the configured logic requires an action, the CPU coordinates the corresponding output or control path. Depending on the application, this may result in a trip, alarm, interlock, control command, or other programmed response.
5. Monitoring and diagnostics
The CPU also manages system information used for relay status and diagnostics. This allows maintenance personnel to review system behavior and identify conditions affecting processing, I/O, configuration, or communication.
6. External system communication
The processing layer coordinates information exchanged between the UR Series relay and connected engineering, monitoring, or control equipment, allowing relay data and status information to be incorporated into the wider protection system.
Role in a Multilin UR Series Protection Architecture
The UR 9EH occupies the central processing layer of the Multilin UR Series architecture. Measurement and I/O modules supply information, while the CPU processes that information and coordinates the configured protection, control, monitoring, and communication functions.
| Architecture Layer | Typical Function | Role of UR 9EH |
|---|---|---|
| CT / VT Modules | Acquire current and voltage measurements | Supplies measurement information to the processing layer |
| I/O Modules | Interface equipment status and control circuits | Provides status and control information |
| CPU Module | Process data and execute configured logic | Central processing and coordination |
| Protection Functions | Evaluate electrical conditions | Executed and coordinated by the CPU |
| Output / Trip Layer | Transfers protection and control commands | Coordinates configured output actions |
| Communication Layer | Exchanges relay information | Supports system-level data coordination |
| Engineering / Monitoring Layer | Configuration and supervision | Interacts with relay data and diagnostics |
Industrial Applications
| Application | Typical Use |
|---|---|
| Electrical Substations | Central processing for feeder and equipment protection |
| Power Generation | Coordinating generator protection, control, and monitoring functions |
| Industrial Distribution | Processing electrical measurements and configured protection logic |
| Switchgear Protection | Managing protection and control functions within switchgear systems |
| Transformer Protection | Coordinating transformer-related measurements and protection logic |
| Motor Protection | Processing measurement and status information for configured motor protection |
| Utility Protection | Supporting modular relay processing in utility electrical systems |
| Process Plants | Integrating electrical protection, monitoring, diagnostics, and control |
Installation and Maintenance
- Verify the CPU model — Confirm that UR 9EH matches the approved Multilin UR Series hardware configuration.
- Review the complete relay arrangement — Check the installed measurement, I/O, and communication modules before replacing the CPU.
- Follow power isolation procedures — De-energize the applicable protection equipment according to the approved maintenance procedure.
- Use appropriate ESD precautions — Protect the CPU and other electronic modules from electrostatic discharge during handling.
- Check module seating — Ensure the CPU is correctly positioned and fully seated within the relay assembly.
- Inspect associated hardware — If CPU-related diagnostics appear, also check connected I/O, CT/VT, power, and communication components.
- Verify configuration compatibility — Confirm that the installed CPU corresponds with the intended relay configuration.
- Review system diagnostics — Check available status and diagnostic information after installation or when investigating abnormal operation.
- Verify communication — Confirm that required communication with engineering, monitoring, or control systems is functioning correctly.
- Check protection configuration — Verify that the configured protection functions correspond to the installed hardware and connected measurement paths.
- Perform functional testing — Test applicable protection, alarm, control, and output functions before returning the relay to service.
- Document maintenance work — Record the CPU replacement, configuration verification, diagnostic status, and functional-test results.
Related Components
| Component | Function |
|---|---|
| GE Multilin UR Series CT/VT Module | Provides current and voltage measurement interfaces |
| GE Multilin UR Series I/O Module | Interfaces equipment status and control circuits |
| GE Multilin UR Series Protection Relay | Provides the complete modular protection platform |
| Current Transformer (CT) | Supplies current measurement information |
| Voltage Transformer (VT) | Supplies voltage measurement information |
| Protection Output / Trip Circuit | Transfers configured relay commands to external equipment |
| Engineering / Monitoring System | Supports relay configuration, supervision, and diagnostics |
Recommended Related Models
| Model | Product Type | Typical Relationship |
|---|---|---|
| GE UR 9AH | Universal Relay CPU Module | Related UR Series CPU module |
| GE UR 9CH | Multilin UR Series Universal Relay CPU Module | Related UR Series CPU module |
| GE UR 8GH | Multilin UR Series CT/VT Ground Protection Module | Related measurement and protection interface |
| GE UR 8NH | Multilin UR Series CT/VT Module | Related CT/VT interface module |
Key Advantages
- Central CPU processing within the Multilin UR Series architecture
- Coordinates configured protection and control logic
- Processes information from measurement and I/O modules
- Supports relay monitoring and diagnostics
- Coordinates protection outputs and system functions
- Integrates processing with the modular UR Series platform
Technical FAQs
What is the function of the GE UR 9EH CPU Module?
The UR 9EH serves as a central processing module within the Multilin UR Series architecture. It processes measurement and status information and coordinates configured protection, control, monitoring, and communication functions.
How does the UR 9EH interact with CT/VT and I/O modules?
CT/VT and I/O modules provide measurement and status information to the relay system. The UR 9EH processes that information and applies the configured logic, while the associated output hardware carries out the required control or protection action.
What should be checked when multiple relay functions are affected simultaneously?
Start with system-level diagnostics and CPU status, then check the relay’s power, configuration, communications, measurement modules, and I/O hardware. A problem affecting several functions at once should not automatically be attributed to a single field input.
What tests should be performed after replacing the UR 9EH?
Verify CPU recognition and diagnostics, then check the relay configuration, communications, measurement inputs, protection functions, alarms, and required outputs. Applicable protection and functional tests should be completed before the relay is returned to service.