Description
GE UR8NH Multilin Universal Relay Module
Product Overview
The GE UR8NH is a high-performance universal relay expansion module belonging to the GE Multilin UR series, professionally manufactured by General Electric for power system protection, industrial automation and substation monitoring applications. Serving as an auxiliary I/O and signal expansion module for Multilin UR-series protective relays, the UR8NH provides reliable signal acquisition, circuit isolation and contact expansion functions. With compact mechanical structure, high dielectric isolation strength and excellent electromagnetic compatibility performance, this module is widely installed in power distribution cabinets, high-voltage substations, industrial power control systems and energy management equipment. It maintains long-term stable operation in complex electromagnetic interference environments, ensuring accurate signal transmission and secure circuit switching for power protection devices.
GE UR8NH
Core Product Features
2.1 Industrial-Grade Reliable Hardware Design
The UR8NH module adopts high-quality dielectric polymer insulating materials and reinforced printed circuit board. It features robust anti-interference capability with 2 kV AC RMS dielectric isolation, effectively preventing high-voltage surge and cross-circuit signal crosstalk in power systems. All electronic components comply with industrial high-standard screening, supporting continuous long-term operation without frequent maintenance, adapting to uninterrupted working requirements of power industry.
2.2 Flexible Signal Expansion Capacity
Designed for universal signal expansion, this module is compatible with 1-phase and 3-phase power systems. It integrates multi-channel signal access terminals, supporting analog and digital signal synchronous collection. The internal circuit is reasonably grouped with clear functional partitioning, which facilitates on-site wiring and later circuit debugging. It can expand input and output ports for master protection relays to meet multi-point signal monitoring demands of complex power stations.
2.3 Excellent Environmental Adaptability
Optimized for harsh power station working conditions, the module has a wide operating temperature range from -20°C to +70°C, and the storage temperature spans from -40°C to +85°C. It can normally work under relative humidity of 5% to 95% (non-condensing), resisting dust, moisture and ambient temperature fluctuation in indoor power distribution rooms and outdoor cabinet environments.
2.4 Low Power Consumption & Easy Installation
Powered by the matched Multilin UR relay base without additional external power supply, the module features passive low-power design to reduce system energy consumption. It supports standard cabinet embedded installation and rail mounting, with compact overall size saving internal cabinet space. The standardized terminal wiring interface simplifies construction steps and lowers on-site installation difficulty.
Detailed Technical Specifications
3.1 Electrical Performance Parameters
| Parameter Item | Technical Data |
|---|---|
| Product Model | UR8NH |
| Product Type | Multilin Universal Relay Expansion Module |
| Applicable System | 1-phase / 3-phase Power System |
| Voltage Transformer Input | 4 × 50 – 240 V AC |
| Current Transformer Burden | ≤ 0.12 VA @ 5 A |
| Measurement Accuracy | 0.2% of reading ± 0.02% of range |
| Working Frequency Range | 45 Hz – 65 Hz |
| Dielectric Isolation Strength | 2 kV AC RMS |
| Signal Interface Type | Analog & Digital Mixed Interface |
3.2 Power Supply Parameters
| Power Parameter | Specification |
|---|---|
| Power Supply Mode | Powered by UR series relay base (no independent power supply) |
| Optional Working Voltage | 24 V DC / 110 V AC / 220 V AC |
| Power Consumption | Ultra-low passive power consumption |
3.3 Environmental & Mechanical Parameters
| Item | Technical Specification |
|---|---|
| Operating Temperature | -20°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Ambient Humidity | 5% – 95% (Non-condensing) |
| Ingress Protection Rating | IP20 (Indoor cabinet protection grade) |
| Installation Method | DIN-Rail mounting / Cabinet embedded installation |
| Weight | Approx. 1.50 kg |
| Dimensions (L × W × H) | 180 mm × 145 mm × 120 mm |
Certification Compliance
The GE UR8NH relay expansion module has passed multiple international authoritative certifications to meet global industrial and power industry standards. It holds CE electromagnetic compatibility certification and UL safety certification, complying with IEC international electrical safety specifications. In addition, the product conforms to ISO 9001 quality management system standards and RoHS environmental protection directives. Strict factory testing ensures that the module has excellent anti-interference performance, electrical safety and long-term stability, meeting the stringent requirements of power industry substations and industrial power distribution systems.
Application Scenarios
- Power Substation Protection System: Matched with GE Multilin UR series relays to expand signal acquisition ports, used for voltage and current signal monitoring of high and medium voltage power distribution equipment.
- Industrial Power Distribution: Applied in factory power distribution cabinets to realize switching signal transmission and state feedback of power distribution loops.
- Energy Management System: Collect analog electrical signals such as 4-20mA to assist intelligent monitoring and data analysis of energy storage and power supply equipment.
- Railway & Municipal Power Supply: Deployed in railway power supply stations and municipal power grid facilities to ensure safe and reliable operation of public power infrastructure.
- Petrochemical Power Control: Used in industrial power control links of chemical and petroleum enterprises, adapting to complex electromagnetic industrial environments.
Product Advantages & After-sales Support
The GE features high measurement accuracy and strong dielectric isolation capability, effectively avoiding signal distortion and high-voltage breakdown risks in power system operation. Its passive power supply design simplifies system circuit layout and reduces equipment failure points. The industrial-grade temperature tolerance enables stable operation in indoor unheated and non-air-conditioned power distribution rooms. With standardized structural design, it is highly compatible with all models of GE Multilin UR master relays, realizing seamless docking and convenient replacement maintenance.
GE provides a 1-year official manufacturer warranty for the module. Complete technical datasheets, wiring diagrams and user manuals are provided for users. Professional after-sales technical support covers equipment debugging, compatibility consultation and fault maintenance, ensuring long-term reliable operation of power system equipment.
Conclusion
The GE is a high-precision and high-reliability universal relay expansion module specially designed for power protection systems. With outstanding electrical isolation performance, accurate signal collection capability and wide environmental adaptability, it perfectly matches GE Multilin UR-series protective relays to expand system I/O functions. Featuring compact structure, simple installation and strong compatibility, this module is widely applicable in various power grid and industrial power scenarios. As a mature auxiliary component in power automation systems, the GE remains a cost-effective and stable choice for substation upgrading, power distribution transformation and industrial power monitoring projects.
