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- UR 9AH
- Universal Relay CPU Module
- USA
- 120 × 30 × 100 mm
- 0.74 kg
- Xiamen, China
- New & In Stock
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Product Overview
The GE UR 9AH is a Universal Relay CPU Module used within the GE Multilin UR Series modular protection platform. As the central processing element of the relay architecture, it handles the processing and coordination tasks required to turn acquired electrical measurements into protection, control, monitoring, and communication functions.
In a typical UR Series installation, measurement modules receive signals from CTs, VTs, and other connected inputs, while the CPU coordinates the information used by the relay’s configured functions. It also works with the relay’s logic, event recording, diagnostics, and communication structure, depending on the overall system configuration.
The CPU module is therefore different from an input or CT/VT interface module. Its role is centered on processing and system coordination rather than providing a dedicated field measurement connection. During maintenance, a CPU-related issue can affect multiple relay functions simultaneously, making system diagnostics and configuration verification particularly important.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | UR 9AH |
| Product Type | Universal Relay CPU Module |
| Product Family | Multilin UR Series |
| Series | GE Multilin UR Series |
| Module Type | CPU / Processing Module |
| Processing Function | Relay Control and Data Processing |
| System Function | Protection, Control, Monitoring and Coordination |
| 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 | 0.74 kg |
Product Features
- Central processing function coordinates the data and logic used by the UR Series protection system.
- Multilin UR Series integration provides the processing foundation for a modular universal relay architecture.
- Protection logic coordination allows configured protection functions to work with acquired electrical measurements.
- System monitoring support coordinates information used for relay status, diagnostics, and operating records.
- Communication coordination supports the relay’s interaction with connected system interfaces and external control equipment.
- Modular architecture separates processing responsibilities from dedicated measurement and interface modules.
- Maintenance-oriented diagnostics helps the protection system identify and report operating or configuration conditions.
Working Principle
The UR 9AH operates as the processing core within the modular UR Series relay architecture. It receives information from the relay’s measurement and I/O structure, executes configured logic, and coordinates the resulting protection and control actions.
1. Data acquisition
Electrical measurements are obtained through the appropriate CT/VT and I/O modules within the protection system. These modules provide the CPU with the information required for the configured relay functions.
2. Data processing
The CPU processes the incoming measurement and status information according to the relay configuration. It evaluates the data against the operating logic associated with the installed protection application.
3. Protection logic execution
Configured protection functions use the processed information to determine whether an electrical condition meets the relevant operating criteria. The CPU coordinates these functions rather than acting as a standalone measurement interface.
4. Control and output coordination
When a protection or control function requires an action, the CPU coordinates the corresponding relay logic and output path. Depending on the application, this can include trip, alarm, control, or other programmed responses.
5. Monitoring and diagnostics
The CPU also coordinates system information used for diagnostics, status monitoring, event information, and maintenance activities. This gives technicians a central point for evaluating the operating condition of the relay system.
6. Communication and system integration
The processing module works with the broader UR Series architecture to make relay information available to connected control, monitoring, or engineering systems. The exact communication functions depend on the complete relay configuration.
Role in a Multilin UR Series Protection Architecture
The UR 9AH occupies the central processing layer of a Multilin UR Series protection system. Measurement modules provide electrical data, while the CPU processes that information and coordinates the configured protection, control, monitoring, and communication functions.
| Architecture Layer | Typical Function | Role of UR 9AH |
|---|---|---|
| CT / VT and Input Modules | Acquire electrical measurements | Supplies data to the processing layer |
| I/O Modules | Interface status and control signals | Provides input and output information |
| CPU Module | Processes data and executes configured logic | Central processing and coordination |
| Protection Functions | Evaluate electrical conditions | Executed and coordinated by the CPU |
| Output / Trip Logic | Generates configured control responses | Coordinates the required relay actions |
| Communication Layer | Exchanges relay information with external systems | Supports system-level data coordination |
| Engineering / Monitoring System | Configuration, diagnostics and supervision | Receives relay information through the system interfaces |
Industrial Applications
| Application | Typical Use |
|---|---|
| Electrical Substations | Central processing for modular feeder and equipment protection |
| Power Generation | Coordinating protection and control functions around generating equipment |
| Industrial Power Systems | Processing measurements and executing configured electrical protection logic |
| Switchgear Protection | Coordinating protection, monitoring, and control functions |
| Transformer Protection | Processing transformer-related measurements and protection logic |
| Motor Protection | Coordinating electrical measurements and configured motor protection functions |
| Utility Protection | Supporting centralized processing within modular protection relays |
| Process Industry | Integrating electrical protection, control, diagnostics, and monitoring functions |
Installation and Maintenance
- Verify the CPU model — Confirm that UR 9AH matches the approved UR Series relay configuration before installation.
- Review the system configuration — Check the relay hardware arrangement and installed modules before replacing the CPU.
- Follow power isolation procedures — De-energize the applicable protection equipment according to the approved maintenance procedure before removing the module.
- Protect the module from static discharge — Use appropriate ESD precautions when handling the CPU and other electronic protection hardware.
- Check module seating — Ensure the CPU is correctly positioned and fully seated within the relay assembly.
- Inspect associated modules — If CPU-related faults occur, also check the measurement, I/O, and communication modules because system behavior depends on their interaction.
- Verify configuration compatibility — Confirm that the installed CPU and relay configuration are consistent before returning the equipment to operation.
- Check diagnostic information — Review relay status and diagnostic indications to identify CPU, configuration, or system-level abnormalities.
- Verify communication functions — After replacement or maintenance, confirm that required communication paths operate correctly.
- Check protection logic — Verify that configured protection functions remain available and correctly associated with the installed relay hardware.
- Perform functional testing — Test applicable protection, control, monitoring, and output functions before placing the relay back into service.
- Document the replacement — Record the module change, configuration status, test results, and any associated maintenance actions.
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 field status and control signals |
| GE Multilin UR Series Protection Relay | Provides the complete modular protection platform |
| Current Transformer (CT) | Supplies current measurements to the protection system |
| Voltage Transformer (VT) | Supplies voltage measurements to the protection system |
| Trip / Output Module | Interfaces configured protection commands with external circuits |
| Engineering / Monitoring System | Supports relay configuration, supervision, and diagnostics |
Recommended Related Models
| Model | Product Type | Typical Relationship |
|---|---|---|
| GE UR 8GH | Multilin UR Series CT/VT Ground Protection Module | Related measurement and protection interface |
| GE UR 8LH | Multilin UR Series CT/VT Module | Related CT/VT interface module |
| GE UR 8NH | Multilin UR Series CT/VT Module | Related CT/VT interface module |
| GE UR 9BH | Universal Relay CPU Module | Related UR Series processing module |
Key Advantages
- Central CPU processing for the Multilin UR Series architecture
- Coordinates protection and control logic
- Processes information from measurement and I/O modules
- Supports relay diagnostics and system monitoring
- Integrates processing with the wider UR Series modular structure
- Suitable for centralized protection-system coordination
Technical FAQs
What is the role of the GE UR 9AH CPU Module?
The UR 9AH serves as a central processing module within the Multilin UR Series architecture. It processes information from the relay’s measurement and I/O structure and coordinates configured protection, control, monitoring, and system functions.
How is the UR 9AH different from a CT/VT module?
A CT/VT module provides an interface for transformer-derived electrical measurements, while the CPU module handles processing and system coordination. The two modules therefore perform different functions within the overall UR Series architecture.
What symptoms may indicate a CPU-related problem?
Possible indications can include abnormal relay diagnostics, loss of coordinated relay functions, configuration-related problems, or issues affecting multiple system functions at the same time. These symptoms should be evaluated alongside the relay’s diagnostic information and the status of the associated modules.
What should be verified after replacing the UR 9AH?
The installed hardware configuration, relay configuration, module status, protection functions, communications, and required output or trip functions should all be verified. Applicable functional tests should be completed before returning the protection system to service.