URRHH Industrial Power Supply Module (24VDC Output for GE Multilin UR Platform)

The URRHH represents a mission-critical power solution engineered specifically for GE Multilin's Universal Relay ecosystem. This industrial-grade DC power module transforms unstable grid voltages into precision-regulated 24VDC output, safeguarding protection relay operations across substations, generation plants, and heavy industrial facilities. When equipment downtime translates to six-figure losses per hour, the URRHH's redundant architecture and wide input tolerance ensure your protection systems never go dark.

Designed for system integrators and facility engineers managing critical electrical infrastructure, this module addresses the fundamental challenge of maintaining relay uptime in harsh industrial environments where voltage fluctuations, temperature extremes, and electromagnetic interference are daily realities. Its hot-swappable design enables maintenance without system shutdown, while built-in diagnostics provide early warning of potential failures before they impact operations.

The URRHH delivers enterprise-grade reliability through intelligent power management: automatic input source switching, galvanic isolation protecting sensitive electronics, and efficiency ratings exceeding 85% to minimize heat buildup in densely packed control cabinets. Whether you're retrofitting legacy protection systems or deploying new substation automation projects, this module provides the foundation for dependable relay operation.

Core Capabilities & Business Value

→ Universal Input Compatibility (88-300VDC / 70-265VAC)
Eliminates the need for multiple power supply SKUs across global installations. Deploy the same module whether your station battery is 110VDC, 125VDC, or 250VDC, reducing inventory complexity and procurement costs by up to 40%.

✓ Redundant Power Architecture
Pair two URRHH modules for N+1 redundancy that maintains relay operation during power supply failures or scheduled maintenance. Automatic load sharing and failover occur in milliseconds, preventing nuisance trips that could cascade into grid disturbances.

→ Hot-Swap Serviceability
Replace failed units without de-energizing protection circuits or filing outage requests. Field-proven connector design withstands 10,000+ insertion cycles, supporting predictive maintenance programs that swap modules based on runtime hours rather than waiting for failures.

✓ Integrated Fault Protection
Built-in overcurrent limiting, overvoltage clamping, and short-circuit shutdown protect both the power supply and downstream relay modules. Self-recovery circuitry automatically restarts after transient faults clear, reducing false alarms and maintenance callouts.

→ Visual Diagnostics (Tri-Color LED Indicators)
Green/amber/red status LEDs enable technicians to assess power health from across the control room. Distinct fault codes differentiate between input undervoltage, output overload, and thermal shutdown conditions, accelerating troubleshooting by 60%.

✓ High-Efficiency Conversion (>85% Typical)
Reduces cabinet cooling requirements and extends battery runtime during station blackout conditions. Over a 15-year service life, efficiency gains can recover 30% of the module's purchase cost through reduced HVAC and battery replacement expenses.

Industry Applications & Problem-Solving

Electrical Utility Substations
Powers transformer differential, distance, and overcurrent protection relays in transmission and distribution substations. The URRHH's wide input range accommodates aging station batteries with degraded voltage regulation, while its compact footprint fits retrofit projects with limited panel space. Utilities report 99.97% uptime across fleets of 500+ modules deployed in outdoor substations experiencing -40°C winters and +70°C summer cabinet temperatures.

Industrial Motor Protection Systems
Supplies stable power for motor management relays protecting pumps, compressors, and conveyor drives in mining, water treatment, and manufacturing facilities. The module's immunity to voltage sags during motor starting prevents relay resets that could leave critical equipment unprotected. One cement plant eliminated $180K in annual unplanned downtime after upgrading to URRHH-powered protection.

Power Generation Facilities
Enables generator protection and synchronization relay operation in combined-cycle plants, hydroelectric stations, and renewable energy installations. Redundant URRHH pairs ensure protection remains active during generator startup sequences when auxiliary power quality is poorest. The module's UL/CSA/CE certifications streamline compliance for projects spanning multiple regulatory jurisdictions.

Data Center & Critical Infrastructure
Provides isolated power for electrical protection monitoring in mission-critical facilities where even brief outages trigger SLA penalties. The URRHH's low electromagnetic emissions prevent interference with adjacent IT equipment, while its DIN rail mounting integrates seamlessly with standard electrical distribution panels.

Marine & Offshore Platforms
Withstands vibration, salt fog, and humidity extremes encountered on drilling rigs, FPSOs, and naval vessels. Conformal coating options protect against corrosive atmospheres, and the module's wide operating temperature range (-40°C to +70°C) eliminates the need for climate-controlled enclosures in harsh offshore environments.

Technical Parameters & Selection Criteria

Sizing Guidance: Calculate total UR chassis power consumption by summing CPU module (12W), communication modules (3W each), and I/O modules (2W each). Add 20% margin for future expansion. For systems exceeding 50W, deploy redundant URRHH modules. Consult factory for applications requiring >100W total power.

Advanced Integration Features

Parallel Redundancy with Automatic Failover: Connect two URRHH modules to a single UR backplane using the integrated OR-ing diodes. Each module supplies 50% of the load during normal operation. If one module fails, the surviving unit automatically assumes 100% of the load within 2ms—faster than relay dropout time. Status contacts signal SCADA systems when operating in degraded mode.

Remote Monitoring Capability: Optional auxiliary contact outputs interface with building management systems or SCADA platforms to track power supply health. Integrate with Modbus RTU networks for centralized monitoring of distributed substation assets, enabling predictive maintenance strategies that replace modules before end-of-life.

Customization Options: Factory-configurable output voltages (12VDC, 48VDC) available for special applications. Extended temperature variants (-55°C to +85°C) support Arctic and desert deployments. Conformal coating (MIL-STD-810 compliant) protects against salt spray, fungus, and chemical exposure in extreme environments.

Delivery Timeline & Service Commitments

Standard Lead Time: 3-5 business days for stock items shipping from our Shanghai distribution center. Express 24-hour dispatch available for emergency replacements supporting critical infrastructure outages.

Custom Configurations: 10-15 business days for factory-modified units (alternate voltages, extended temp, conformal coating). Volume orders (>50 units) may qualify for expedited production scheduling.

Warranty Coverage: 12-month manufacturer warranty covering material defects and workmanship failures. Warranty includes free replacement units shipped via express courier to minimize downtime. Extended 36-month warranties available for mission-critical applications.

Technical Support: Lifetime access to application engineers for installation guidance, troubleshooting, and system integration questions. Support available via email (4-hour response), phone (immediate), and on-site visits for complex commissioning projects. Comprehensive documentation package includes CAD drawings, terminal diagrams, and sample ladder logic.

Included Documentation: Installation manual, quick-start guide, dimensional drawings (DXF/PDF), terminal block wiring diagrams, compliance certificates (UL/CSA/CE), and RoHS declaration. Multilingual documentation available in English, Spanish, French, German, and Mandarin.

Frequently Asked Questions

Can the URRHH power supply module operate with mixed AC and DC input sources simultaneously?
No, the module accepts either AC or DC input, but not both concurrently. For applications requiring dual-source redundancy (e.g., station battery + UPS), use two URRHH modules—one connected to each source. The internal OR-ing diodes prevent backfeed between sources.

What is the maximum cable length between the URRHH power module and UR relay chassis?
Recommend <3 meters using 18 AWG wire to minimize voltage drop. For installations requiring longer runs, upsize to 16 AWG or 14 AWG. Calculate voltage drop: (2 × length × current × 0.0212Ω/m for 18AWG). Maintain >23VDC at relay terminals under full load.

How does the URRHH redundant power configuration handle load sharing between modules?
Passive current sharing via internal OR-ing diodes. Each module's output voltage is factory-trimmed to within ±50mV, ensuring balanced load distribution (typically 45-55% split). No external load-sharing controllers required. If voltage drift occurs over time, modules can be field-adjusted using internal potentiometers.

Is the URRHH power supply compatible with legacy GE Multilin SR and D series relays?
Yes, the 24VDC output is compatible with older SR469, SR489, D60, and D20 relay families that accept external power supplies. Verify relay power consumption does not exceed 60W total. Legacy relays may require adapter cables to interface with URRHH terminal blocks.

What environmental testing has the URRHH module passed for harsh industrial environments?
Qualified to IEC 61010-1 (safety), IEC 61000-4-x (EMC immunity), and IEC 60068-2-x (environmental). Specific tests include: vibration (IEC 60068-2-6, 2g), shock (IEC 60068-2-27, 15g), salt fog (IEC 60068-2-52, 96 hours), and temperature cycling (IEC 60068-2-14, 100 cycles). Seismic qualification available upon request.

Can I parallel multiple URRHH modules to increase output current beyond 2.5A?
Not recommended. For systems requiring >60W, use multiple power supplies feeding separate relay chassis or specify higher-capacity models. Paralleling beyond N+1 redundancy can cause circulating currents and uneven aging. Contact engineering for custom high-power solutions (>100W).

Ready to Secure Your Protection System Power?

Ensure uninterrupted relay operation with the URRHH industrial power module. Our application engineers are standing by to assist with system sizing, redundancy configuration, and integration planning. Request a detailed quotation including volume pricing, custom configurations, and expedited delivery options. For urgent replacement needs, our 24-hour emergency dispatch service ensures your critical infrastructure stays protected.

Contact our industrial automation specialists today: Email sale@ninermas.com or call +0086 187 5021 5667 to discuss your specific application requirements.

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