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GE Multilin UR Series UR-RHH Second Generation Power Supply Module
Source: | Author:kongjiang | Published time: 2026-09-20 | 41 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
The UR-RHH is a second-generation high-voltage power supply module designed for the GE Multilin Universal Relay (UR) series protection and control systems. As a critical component of the UR platform, this module delivers regulated power to the relay chassis and provides auxiliary power for dry-contact input circuits.

GE Multilin UR-RHH Second Generation Power Supply Module

Overview

The UR-RHH is a second-generation high-voltage power supply module designed for the GE Multilin Universal Relay (UR) series protection and control systems. As a critical component of the UR platform, this module delivers regulated power to the relay chassis and provides auxiliary power for dry-contact input circuits.
The UR-RHH supports a wide range of input voltages with two available configurations: the Low Range (LO) variant operates at 24–48 VDC nominal, while the High Range (HI) variant accepts 125–250 VDC or 100–240 VAC. This flexibility makes the module suitable for diverse substation and industrial power environments.

Key Features

  • Dual Input Voltage Ranges: Supports both low-voltage DC and high-voltage AC/DC applications with a single module family .

  • Built-in Self-Diagnostics: The module works with the relay's self-test system to continuously monitor internal hardware health and automatically de-energize in case of critical failure .

  • LED Status Indicators: Faceplate LEDs provide real-time power supply status — Continuous ON (normal operation), ON/OFF Cycling (warning or minor fault), and OFF (critical failure or no power) .

  • Redundant Power Support: Optional redundancy allows parallel installation of two modules, ensuring uninterrupted operation for mission-critical applications .

  • Internal Protection: Built-in 4 A / 250 V fuse protects against overload conditions .

  • Auxiliary Power Output: Supplies power to the relay's dry-contact input circuits in addition to the main processing logic.

Technical Specifications

Note: Input voltage range and power rating vary by configuration. Verify the physical nameplate before installation or replacement.

Compatibility and System Integration

The UR-RHH is fully compatible with all GE Multilin Universal Relay chassis systems . It integrates seamlessly with other UR modules including CPU, CT/VT input, digital I/O, and communication modules.
When replacing a power supply module, verify whether the installation uses a redundant configuration. Both modules in a redundant pair must be of the same type (e.g., RH and RH) to avoid potential hardware damage or undetermined system behavior .

Applications

  • Substation Protection and Control: Provides reliable power for protective relays in utility and industrial substations.

  • Power Generation and Distribution: Supports monitoring and protection of generators, transformers, and transmission lines.

  • Industrial Automation: Delivers stable power for critical assets in factory power management systems .

  • Infrastructure: Applied in rail transport, traffic management, and telecommunications power systems .

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