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- UR 9HH
- Universal Relay CPU Module
- USA
- 120 × 30 × 100 mm
- 1.5 kg
- Xiamen, China
- New & In Stock
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Product Overview
The GE UR 9HH is a Universal Relay CPU Module for the Multilin UR Series modular protection platform. It serves as the central processing section of the relay, coordinating information from measurement, I/O, communication, and other functional modules installed in the same UR system.
In a typical electrical protection cabinet, the CPU receives processed measurement and status information from CT/VT and I/O interfaces, executes the configured protection and control logic, and coordinates the resulting system responses. It also supports diagnostic processing and communication functions required for integrating the relay into a larger protection or automation system.
The UR 9HH is therefore part of the relay’s core processing architecture rather than a standalone field signal interface. Its operation is closely related to the configuration of the complete UR relay, making configuration compatibility and system verification important considerations during replacement or maintenance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | UR 9HH |
| Product Type | Universal Relay CPU Module |
| Product Family | Multilin UR |
| Series | Multilin UR Series |
| Module Type | CPU Module |
| System Role | Central relay processing |
| Processing Function | Protection, control, diagnostics, and system coordination |
| Measurement Integration | Modular CT/VT and I/O architecture |
| I/O Integration | Multilin UR modular I/O |
| Communication Role | Relay data and system communication coordination |
| Configuration | UR Series relay configuration |
| Application | Electrical protection and control |
| Installation | Modular relay chassis |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 1.5 kg |
Product Features
- Central CPU module for a Multilin UR Series protection system.
- Coordinates information from measurement and field-interface modules.
- Supports execution of configured protection and control logic.
- Integrates system diagnostics and operating-status information.
- Works within the modular UR Series relay architecture.
- Supports communication between relay functions and connected supervisory systems.
- Suitable for protection and control applications involving generators, motors, transformers, feeders, and industrial power systems.
- Provides a central processing point for coordinating multiple relay functions.
Working Principle
1. Receiving system information
The UR 9HH receives measurement and status information through the modular UR relay architecture. CT/VT modules, digital I/O, analog interfaces, and other functional modules form the input layer surrounding the CPU.
2. Processing protection information
The CPU processes the available information according to the relay’s configured protection and control functions. Rather than directly performing the physical measurement, it interprets information supplied by the appropriate interface modules and coordinates the programmed logic.
3. Coordinating relay functions
Protection functions, control logic, alarms, status handling, and other configured operations require coordinated processing. The CPU provides the processing path that allows these functions to operate as part of one integrated relay configuration.
4. Handling diagnostics
System and module status information can be processed for diagnostic purposes. During troubleshooting, this information helps maintenance personnel examine whether an abnormal condition is associated with the CPU, another module, configuration, communication, or an external field circuit.
5. Supporting communication
The CPU also participates in the processing of information exchanged through the relay’s communication architecture. This allows relevant measurements, status information, alarms, and relay data to be made available to connected monitoring or control systems where applicable.
Role in a Multilin UR Series Protection Control Architecture
The UR 9HH occupies the central processing position in a modular UR Series relay. Measurement modules acquire electrical information, I/O modules interface with field equipment, communication modules connect external systems, and the CPU coordinates the processing of these different information paths.
| Architecture Layer | Typical Function | Relationship with UR 9HH |
|---|---|---|
| CT/VT Interface | Receives current and voltage measurement signals | Supplies measurement information for CPU processing |
| Digital I/O | Interfaces status and control circuits | Exchanges field status and control information |
| Analog I/O | Interfaces applicable analog signals | Supplies additional process information |
| Communication Interface | Connects external systems | Exchanges processed relay information |
| CPU Module | Central relay processing | UR 9HH 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 data through the communication architecture |
Industrial Applications
| Application | Use of the UR 9HH |
|---|---|
| Generator Protection | Provides central processing for generator protection configurations |
| Motor Protection | Coordinates measurement and configured motor protection functions |
| Transformer Protection | Processes information used by transformer protection schemes |
| Feeder Protection | Supports coordinated processing of feeder measurements and status signals |
| Substation Protection | Integrates relay processing with measurement, I/O, and communication modules |
| Industrial Power Systems | Supports centralized processing within plant electrical protection systems |
| Distribution Systems | Coordinates relay functions for electrical distribution equipment |
| Protection System Maintenance | Serves as a CPU replacement component within compatible UR Series systems |
Installation and Maintenance
- Isolate the equipment — Follow the site’s electrical safety procedures and place the relevant protection system in a safe maintenance condition before removing the CPU.
- Verify compatibility — Confirm that the UR 9HH is appropriate for the existing Multilin UR relay configuration and installed functional modules.
- Record the existing configuration — Preserve relevant relay settings and configuration information before carrying out a CPU replacement.
- Apply ESD precautions — Use suitable electrostatic discharge protection when handling the CPU and its electronic interfaces.
- Inspect the chassis interface — Check the module connector area and chassis position for contamination, damage, or other conditions that could affect installation.
- Seat the module correctly — Align the CPU with its intended position and ensure that it is properly seated without applying excessive force.
- Inspect neighboring modules — Verify that CT/VT, I/O, communication, and other installed modules remain correctly seated after CPU installation.
- Restore the required configuration — If configuration data needs to be restored, confirm that the correct settings and protection logic correspond to the specific relay application.
- Check startup diagnostics — Review system and module diagnostics after energization and investigate any abnormal indications.
- Verify communications — Check communication with connected engineering, supervisory, or substation systems where applicable.
- Perform functional tests — Verify relevant protection, control, alarm, I/O, and communication functions according to the site’s maintenance or commissioning procedure.
- Document the maintenance work — Record the CPU replacement, configuration status, diagnostic results, and functional test results for future service activities.
Related Components
| Component | Function |
|---|---|
| GE Multilin UR CT/VT Modules | Interface current and voltage measurement signals with the relay |
| GE Multilin UR Digital I/O Modules | Interface 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 monitoring and control systems |
| GE Multilin UR Relay Chassis | Provides the modular platform for the CPU and functional modules |
| GE Multilin UR Protection Modules | Support application-specific protection functions |
| Field CTs and VTs | Supply electrical measurement signals to the relay |
| Relay Configuration Software | Supports configuration, settings, diagnostics, and maintenance |
Recommended Related Models
| Model | Product Type | Typical Relationship |
|---|---|---|
| GE UR 9AH | Universal Relay CPU Module | Related Multilin UR Series CPU module |
| GE UR 9CH | Universal Relay CPU Module | Related UR Series central processing module |
| GE UR 9EH | Universal Relay CPU Module | CPU module for a modular UR relay configuration |
| GE UR 9EV | Universal Relay CPU Module | Related UR Series CPU module |
| GE UR 9GH | 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 within the UR architecture |
Key Advantages
- Provides centralized processing for a modular Multilin UR protection system.
- Coordinates measurement, protection, control, diagnostics, and communication functions.
- Integrates with the modular architecture of UR Series relay systems.
- Supports coordinated operation of multiple functional modules.
- Suitable for maintenance and CPU replacement in compatible UR Series applications.
- Helps maintain a structured processing path between field interfaces and configured relay functions.
Technical FAQs
What does the GE UR 9HH CPU module process?
The UR 9HH processes information supplied by the relay’s installed measurement and I/O modules and coordinates configured protection, control, diagnostic, and communication functions.
How does the CPU interact with CT/VT modules?
CT/VT modules provide the relay with electrical measurement information. The CPU receives the resulting information through the modular relay architecture and uses it as part of the configured protection and control processing.
What should be verified after installing a replacement UR 9HH?
The relay configuration, module status, diagnostics, communication functions, protection logic, I/O operation, and relevant alarms should be checked. Functional testing should follow the site’s approved commissioning or maintenance procedure.
Can a CPU fault be diagnosed without replacing the module immediately?
Yes. Initial troubleshooting should examine diagnostic indications, power conditions, configuration, neighboring modules, communication paths, and I/O behavior. A CPU-related fault should be considered together with these other possible causes rather than assuming the processor is the source of every relay abnormality.