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- UR 1HH
- Power Supply Module
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- 120 × 30 × 100 mm
- 1.15 kg
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Product Overview
The GE UR 1HH Multilin UR Series Power Supply Module is a power supply component used within GE Multilin UR Series protection and control devices. It forms part of the internal hardware architecture, converting the available input power into the operating power required by the relay’s electronic circuits and associated functional modules.
Unlike an I/O module or communication card, the UR 1HH focuses on maintaining the electrical supply required for the protection device to operate. A stable internal power source is essential for functions such as protection logic, measurement, monitoring, event recording, communications, and relay control.
For maintenance engineers, the power supply module should be considered as part of the complete UR Series relay assembly. When a relay exhibits abnormal startup behavior, loss of display, communication failure, or unexpected resets, the power supply section and its associated connections should be checked together with the main relay hardware.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Model | UR 1HH |
| Product Family | Multilin UR Series |
| Product Type | Power Supply Module |
| Primary Function | Internal Relay Power Supply |
| System Role | Power Conversion and Distribution |
| Application | Protection and Control Systems |
| Installation | GE Multilin UR Series Devices |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 1.15 kg |
Product Features
The UR 1HH supports the power requirements of compatible GE Multilin UR Series protection equipment.
Key characteristics include:
- GE Multilin UR Series power supply module
- Model UR 1HH
- Provides operating power for compatible relay electronics
- Integrates into the UR Series device architecture
- Supports protection and control equipment operation
- Suitable for relay maintenance and replacement
- Supports continuous operation of internal electronic circuits
- Suitable for industrial and utility protection systems
- Used within established UR Series installations
- Suitable for maintenance of existing protection hardware
Working Principle
The UR 1HH operates at the power-supply layer of a Multilin UR Series relay.
A simplified power path can be represented as:
External Power Input → UR 1HH → Internal DC Power Rails → Relay Electronics
The module receives the applicable input power and converts it into the internal supply levels required by the relay’s electronic circuits. These internal power rails support the processor, measurement circuits, protection functions, communication interfaces, display hardware, and other applicable sections of the device.
A power-supply problem can therefore affect several seemingly unrelated relay functions at the same time. For example, communication loss and processor instability may occur alongside display or startup abnormalities when the internal power supply is not operating correctly.
During troubleshooting, engineers should distinguish between a failure of the power supply itself and problems caused by input power, connectors, internal wiring, or downstream electronic circuits.
Role in a Multilin UR Protection Architecture
The UR 1HH occupies the power infrastructure layer of the GE Multilin UR Series architecture.
Station Power → UR 1HH → Relay Electronics → Protection Logic / Measurement / Communication → Control System
| System Layer | Typical Component | Function |
|---|---|---|
| Power Input Layer | Station / Auxiliary Supply | Provides external operating power |
| Power Conversion Layer | UR 1HH | Converts and distributes internal power |
| Processing Layer | UR Series Processor | Executes protection and control logic |
| Measurement Layer | Current / Voltage Inputs | Provides electrical measurements |
| Communication Layer | Relay Communication Interface | Exchanges system data |
| Control Layer | Relay Outputs | Operates associated control circuits |
The power supply module therefore supports the operation of the entire relay rather than serving a single protection channel.
Industrial Applications
The UR 1HH is relevant to installations using GE Multilin UR Series protection and control equipment.
| Application | Typical Use |
|---|---|
| Power Generation | Generator and electrical protection systems |
| Transmission | Protection and monitoring equipment |
| Distribution | Feeder and substation protection |
| Industrial Power Systems | Electrical equipment protection |
| Motor Protection | Supporting compatible UR Series relays |
| Transformer Protection | Relay power infrastructure |
| Substations | Protection and control cabinets |
| Utility Automation | Relay-based monitoring and control |
The specific application depends on the UR Series relay in which the power supply module is installed.
Installation and Maintenance
Replacement of a relay power supply module should be carried out only after confirming the applicable UR Series device configuration and power requirements.
Recommended checks include:
- Confirm the complete UR 1HH model designation.
- Identify the exact UR Series relay.
- Verify compatibility with the existing relay hardware.
- Isolate the applicable power source before replacement.
- Check the input power wiring.
- Inspect connectors for looseness or contamination.
- Examine the module for visible physical damage.
- Verify correct module positioning.
- Ensure connectors are fully seated.
- Restore power according to the applicable maintenance procedure.
- Check relay startup behavior.
- Verify display and processor operation.
- Check communication interfaces.
- Review relay diagnostics and alarms.
- Confirm protection functions after maintenance.
If the relay remains unstable after replacing the power supply module, the input supply, wiring, connectors, and downstream relay electronics should also be investigated.
Related Components
The UR 1HH operates together with several functional sections of a Multilin UR Series protection device.
| Component | Function |
|---|---|
| UR Series Protection Relay | Provides protection and control functions |
| UR 1HH | Supplies internal relay power |
| Processor Module | Executes protection logic |
| Analog Input Section | Receives electrical measurements |
| Digital I/O | Interfaces with external control circuits |
| Communication Interface | Connects the relay to control systems |
| Front Display / Keypad | Provides local operation and status |
| Control Power Wiring | Supplies external operating power |
| CT / VT Circuits | Provide current and voltage measurements |
The correct replacement should be based on the complete relay model and installed hardware configuration.
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| GE UR 1HH | Multilin UR Series Power Supply Module | Relay power infrastructure |
| GE Multilin UR Series Relays | Protection and Control Relay | Electrical protection |
| GE Multilin UR Feeder Protection Relays | Feeder Protection | Distribution and feeder applications |
| GE Multilin UR Generator Protection Relays | Generator Protection | Generator protection |
| GE Multilin UR Transformer Protection Relays | Transformer Protection | Transformer protection |
| GE Multilin UR Motor Protection Relays | Motor Protection | Industrial motor protection |
Model selection should be based on the exact UR Series relay and the required internal hardware configuration.
Key Advantages
- GE Multilin UR Series power supply hardware
- Model UR 1HH
- Supports compatible UR Series protection equipment
- Provides internal relay operating power
- Supports stable operation of relay electronics
- Integrates with the existing UR Series architecture
- Suitable for protection and control systems
- Useful for relay maintenance and replacement
- Supports established utility and industrial installations
- Suitable for long-term protection-system service
Technical FAQs
What functions depend on the UR 1HH power supply module?
The module supports the internal electronic circuits of the compatible UR Series relay. Depending on the relay configuration, these circuits can include processing, measurement, protection logic, communications, display functions, and control outputs.
What symptoms can point toward a relay power-supply problem?
Possible symptoms include failure to start, unexpected resets, loss of the front display, unstable operation, communication interruptions, or multiple relay functions becoming unavailable at the same time. Input power and wiring should be checked before identifying the module as the fault source.
Can a power-supply issue cause communication problems in a Multilin relay?
Yes. Communication hardware depends on the relay’s internal power rails. If those supplies become unstable or unavailable, communication interfaces may stop operating even though the communication network itself is functioning normally.
What should be verified before installing a replacement UR 1HH?
The exact UR Series relay model and internal hardware configuration should be identified first. Technicians should also verify the applicable power arrangement, connector configuration, and replacement procedure before removing the existing module.