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- GE
- UR 9GH
- Universal Relay CPU Module
- USA
- 120 × 30 × 100 mm
- 0.8 kg
- Xiamen, China
- New & In Stock
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Product Overview
The GE UR 9GH is a Universal Relay CPU Module for the Multilin UR Series modular protection platform. It serves as the central processing element that coordinates measurement data, protection functions, control logic, diagnostics, and communication tasks within a configured UR relay.
In a typical protection cabinet, the CPU module works together with CT/VT input modules, digital and analog I/O, communication interfaces, and other functional modules. Measurement signals collected from field-side interfaces are passed into the relay architecture, where the CPU processes the available information according to the configured protection and control scheme.
The UR 9GH is relevant to applications where modular relay architecture is used for generator, motor, transformer, feeder, or other electrical equipment protection. During maintenance, CPU module compatibility is particularly important because the processor participates in the overall relay configuration and coordination of installed functional modules.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | UR 9GH |
| Product Type | Universal Relay CPU Module |
| Product Family | Multilin UR |
| Series | Multilin UR Series |
| Module Type | CPU Module |
| System Role | Central processing and relay coordination |
| Protection Platform | Universal Relay |
| Processing Function | Measurement, protection, control, and diagnostic processing |
| I/O Integration | Modular UR Series I/O architecture |
| Communication Role | Relay system communication and data coordination |
| Configuration | UR Series relay configuration |
| Application | Electrical protection and control |
| Installation | Modular relay chassis |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 0.8 kg |
Product Features
- Central processing module for a Multilin UR Series relay configuration.
- Coordinates information received from measurement and I/O modules.
- Supports execution of configured protection and control functions.
- Integrates relay diagnostics and system status information into the processing architecture.
- Works with the modular structure of the UR Series rather than functioning as an isolated protection device.
- Suitable for protection systems requiring coordinated processing of electrical measurements, status signals, and control commands.
- Useful for maintenance and replacement of the CPU section in an existing UR Series relay installation.
- Supports system-level coordination between the relay processor and installed functional modules.
Working Principle
1. Measurement and status acquisition
Field measurements and status information enter the UR relay through the appropriate CT/VT, digital input, analog input, and other interface modules. These modules form the measurement and signal acquisition layer, while the UR 9GH handles the processing side of the relay architecture.
2. Central processing
The CPU receives available measurement and status information from the modular relay system and processes it according to the configured protection and control functions. The processor therefore provides the link between incoming electrical information and the logical decisions performed by the relay.
3. Protection and control coordination
Once measurement conditions and equipment status are evaluated, the configured relay logic can determine the required protection or control response. The CPU coordinates this processing with the other functional modules installed in the UR relay.
4. Diagnostics and system status
The processor also participates in monitoring the operating condition of the relay system. Diagnostic information can help maintenance personnel distinguish between a field measurement problem, an I/O issue, a configuration problem, communication interruption, or a processor-related fault.
5. Communication and system integration
In an integrated protection system, processed information may be exchanged with other devices or supervisory systems through the relay’s communication architecture. The CPU provides the processing foundation needed to coordinate these system-level data and control functions.
Role in a Multilin UR Series Protection Control Architecture
The UR 9GH sits at the processing center of the modular relay architecture. CT/VT modules provide electrical measurement interfaces, I/O modules handle field signals, communication modules connect the relay to external systems, and the CPU coordinates the information exchanged between these functional sections.
| Architecture Layer | Typical Function | Relationship with UR 9GH |
|---|---|---|
| CT/VT Interface | Receives electrical measurement signals | Supplies measurement information for processing |
| Digital I/O | Handles status and control signals | Provides field status and receives coordinated control functions |
| Analog I/O | Handles applicable analog process signals | Supplies additional operating information |
| Communication Interface | Connects relay with external systems | Exchanges processed relay data and system information |
| CPU Module | Central processing and coordination | UR 9GH performs the core processing role |
| Protection Logic | Executes configured protection functions | Processed and coordinated by the CPU |
| Supervisory System | Monitoring and higher-level control | Receives relevant relay information through communication architecture |
Industrial Applications
| Application | Use of the UR 9GH |
|---|---|
| Generator Protection | Coordinates processing of generator measurement and protection information within the UR relay |
| Motor Protection | Supports processing and coordination of motor protection functions |
| Transformer Protection | Provides central processing for a modular transformer protection configuration |
| Feeder Protection | Processes measurement and status information used by feeder protection logic |
| Substation Protection | Integrates relay processing with field I/O and communication architecture |
| Electrical Distribution | Supports coordinated protection and monitoring of distribution equipment |
| Industrial Power Systems | Provides central relay processing for plant electrical protection systems |
| Retrofit Projects | Can be used when maintaining or servicing compatible modular UR Series protection equipment |
Installation and Maintenance
- Isolate the relay before servicing — Follow the site’s electrical safety procedure and isolate the relevant equipment before removing or installing the CPU module.
- Verify module compatibility — Confirm that the replacement CPU is appropriate for the existing UR Series relay configuration before installation.
- Check the relay configuration — Record relevant configuration information before replacing a processor so the installed protection scheme can be restored correctly.
- Use ESD protection — Handle the CPU using appropriate electrostatic discharge precautions to reduce the risk of damage to electronic circuitry.
- Inspect the module and chassis — Check the connector area, module seating points, and chassis interface for visible contamination or mechanical damage.
- Install the module correctly — Align the CPU with the intended chassis position and ensure that it is fully seated without excessive mechanical force.
- Check neighboring modules — Confirm that adjacent CT/VT, I/O, communication, and other functional modules remain properly seated after CPU installation.
- Restore configuration carefully — If configuration data must be restored, verify that the correct relay configuration is loaded for the particular protection application.
- Check system diagnostics — Review available diagnostic information after startup and investigate any module, communication, or configuration alarms.
- Verify communication — Confirm communication with connected supervisory, engineering, or substation systems where applicable.
- Perform functional testing — Test the relevant protection, control, I/O, and alarm functions according to the site’s commissioning or maintenance procedure.
- Document the replacement — Record the installed CPU model, configuration status, test results, and maintenance date for future troubleshooting and service work.
Related Components
| Component | Function |
|---|---|
| GE Multilin UR CT/VT Modules | Provide current and voltage measurement interfaces for the relay |
| GE Multilin UR Digital I/O Modules | Interface relay logic with field status and control circuits |
| GE Multilin UR Analog I/O Modules | Provide applicable analog signal interfaces |
| GE Multilin UR Communication Modules | Connect the relay with external communication and supervisory systems |
| GE Multilin UR Relay Chassis | Provides the modular mechanical and electrical platform |
| GE Multilin UR Protection Modules | Support application-specific protection functions |
| Field CTs and VTs | Provide electrical measurement signals to the relay |
| Relay Configuration Software | Used for configuration, settings, diagnostics, and maintenance activities |
Recommended Related Models
| Model | Product Type | Typical Relationship |
|---|---|---|
| GE UR 9AH | Universal Relay CPU Module | CPU module for Multilin UR Series relay architectures |
| GE UR 9CH | Universal Relay CPU Module | Alternative UR Series CPU configuration |
| GE UR 9EH | Universal Relay CPU Module | UR Series central processing module |
| GE UR 9EV | Universal Relay CPU Module | Related UR Series CPU module |
| GE UR 8GH | CT/VT Ground Protection Module | Measurement interface for ground protection applications |
| GE UR 8LH | CT/VT Module | CT/VT measurement interface |
| GE UR 8NH | CT/VT Module | CT/VT measurement interface for modular relay systems |
Key Advantages
- Centralizes processing within the modular UR Series relay architecture.
- Coordinates measurement, protection, control, diagnostics, and communication functions.
- Integrates naturally with the UR Series modular I/O structure.
- Supports maintenance and replacement of the CPU section without changing the complete protection architecture.
- Suitable for complex electrical protection systems requiring coordinated processing.
- Helps establish a clear processing path between field measurement modules and relay protection logic.
Technical FAQs
What is the role of the GE UR 9GH in a Multilin UR relay?
The UR 9GH functions as the CPU section of the relay. It processes information supplied by the installed measurement and I/O modules and coordinates configured protection, control, diagnostic, and communication functions.
Can the UR 9GH be treated as a standalone protection relay?
No. The CPU is one functional part of the modular UR Series architecture. The complete protection system also depends on the installed measurement interfaces, I/O, communication functions, configuration, and application-specific relay modules.
What should be checked when replacing a UR 9GH CPU module?
The replacement should be checked for compatibility with the existing relay configuration and installed modules. Configuration data, module status, diagnostics, communication functions, and applicable protection logic should also be verified after installation.
What symptoms can indicate a CPU-related problem in a UR Series relay?
Possible indications include processor or system diagnostic alarms, abnormal relay initialization, loss of expected system coordination, communication-related problems, or unexpected behavior in configured relay functions. Troubleshooting should also examine power, configuration, neighboring modules, communication paths, and field interfaces before identifying the CPU as the cause.