Description
1. Unboxing & Physical Snapshot
- Model & Brand: General Electric (GE Multilin) Universal Relay (UR) Series Power Supply Module — Part Number / Designation: URSHA (UR-SH Generation High-Voltage Module)
- Physical Dimensions: Standard modular slide-in chassis profile designed for rear insertion into GE Universal Relay modular protective relay chassis.
- Estimated Shipping Weight: Approximately 1.8 kg to 2.5 kg net (Packaged in heavy anti-static foam containment and double-walled industrial corrugated export carton)
- What’s in the Box: GE URSHA power supply module unit, rear high-voltage plug-in terminal connections, faceplate status LED panel, and manufacturer compliance/conformance literature.
2. Product Introduction
Structure B (Architecture hook): Engineered for high-reliability power system protection and substation automation, the GE Multilin URSHA serves as a third-generation high-voltage power supply module within the Universal Relay (UR) product ecosystem. Designed to supersede legacy UR-1H and UR-RH generations, this unit powers the protective relay platform and its dry contact input connections, ensuring continuous operation across critical transmission and distribution assets.
Housed in a ruggedized slide-in enclosure with an optional harsh environmental conformal coating, the module features enhanced thermal efficiency and an increased power rating (45 W) compared to older iterations. Its robust isolation barriers and over-temperature protection circuitry ensure reliable performance under severe electrical and thermal stress conditions typical of utility switchyards.
3. Core Technical Specifications
| Parameter | Value |
| Component Type | High-Voltage Power Supply Module |
| Product Family | GE Multilin Universal Relay (UR) Series (UR-SH Generation) |
| Part Number Designation | URSHA |
| Input Voltage Range | 125 V to 250 V DC / AC nominal high-voltage range |
| Power Output Rating | 45 W capacity (optimized thermal dissipation) |
| Isolation Voltage | 2300 VAC input-to-output/chassis isolation |
| Over-Temperature Protection | Automatic thermal shutdown at +105°C internal threshold |
| Mounting Format | Modular slide-in rack format for UR relay chassis |
| Operating Temperature | -40°C to +60°C continuous industrial substation threshold |
| Storage Temperature Range | -40°C to +85°C |
| Physical Net Weight | Approximately 1.5 kg to 2.0 kg |
4. Global Compliance & Industry Certifications
Type-test verification and rigorous electrical compliance standards are mandatory for power supply assets integrated into utility protection and control relays.
- Expected Certifications: CE Mark (EMC and Low Voltage Directives), UL/cUL Listed Industrial Control Equipment ratings, and IEEE / IEC compliance standards for substation automation hardware.
- Safety Relevance: High dielectric isolation (2300 VAC) and over-temperature protection safeguard internal relay processing boards and prevent power supply failure during substation switching surges or high-voltage transients.
- Audit Note: Verify that the input voltage rating (high-voltage 125–250V vs. low-voltage 24–48V models) matches your station battery or auxiliary supply infrastructure prior to chassis installation.
5. Long-Term Storage & Asset Preservation Guide
Veteran Maintenance Note: Storing high-reliability protection relay power modules in unconditioned warehouses requires strict humidity control to preserve electrolytic capacitor health and prevent internal circuit corrosion.
- ESD Protection: Keep the power supply module permanently sealed inside its original metallized anti-static shielding bag to protect internal switching transistors and control ICs from static discharge.
- Climate Baseline: Store the unit in a clean, dry location maintaining relative humidity strictly below 50% non-condensing and ambient temperatures between -20°C and +40°C.
- Physical Preservation: Store units flat on dedicated shelving; never stack heavy equipment directly on top of the module housing to avoid faceplate distortion or connector pin damage.
6. Physical Installation Prerequisites
- Ensure that the DC/AC auxiliary control power feed to the relay chassis is completely locked out and de-energized before inserting or extracting the URSHA power supply module.
- Align the module carefully with the internal chassis guide rails, applying steady pressure until the rear multi-pin high-voltage power connector seats entirely into the backplane.
- Fasten all front-panel retention screws firmly to secure the module against vibration and ensure proper chassis earth ground continuity.
7. Buyer’s FAQ (Logistics & Compliance Focus)
- What Harmonized System (HS) code governs international customs clearance?
The standard global export classification for this industrial power supply unit is 8504.40.9580 (Static converters / power supplies for industrial control and automation systems).
- How does Country of Origin (COO) verification impact utility procurement audits?
Accurate origin tagging on commercial shipping documents ensures compliance with international trade frameworks and regional infrastructure sourcing rules; inspect the factory label for production origin data.
- Is this third-generation supply backward compatible with older UR chassis?
Yes, the URSHA is engineered as a direct form-fit-function replacement for older first-generation (UR-1H) and second-generation (UR-RH) power supplies within existing Universal Relay frames.
- What level of transit insurance should be specified?
Always mandate fully declared-value, tracked air cargo insurance to protect delicate internal electronic components and transformer assemblies against shock drops during global transit.
