Product Overview
The UR8NH (Model: UR8NH) is a high-performance Current Transformer/Voltage Transformer (CT/VT) interface module specifically designed for the GE Multilin Universal Relay (UR) platform. Serving as the primary data acquisition gateway, the UR8NH (Part Number: UR8NH) provides eight standardized analog channels to facilitate high-fidelity measurements of primary power system parameters. This module is a critical component for protection, monitoring, and revenue-grade metering in utility substations and large-scale industrial power plants.
Leveraging the modular architecture of the UR series, the UR8NH (Model: UR8NH) converts high-level secondary currents and voltages into precise digital signals for the relay’s central processing unit. The hardware includes advanced onboard diagnostics that continuously verify the integrity of the internal A/D converters and transformer windings. This ensures the relay has access to the precise, real-time waveform data necessary for executing complex protection algorithms and maintaining grid stability.
Detailed Technical Specifications
The UR8NH module is engineered to meet rigorous IEEE and IEC protective relay standards for substation environments.
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Manufacturer: General Electric (GE Multilin)
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Model Number: UR8NH
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Module Type: 8-Channel CT/VT Analog Input Module
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System Compatibility: GE Multilin Universal Relay (UR) Series (e.g., G60, L90, D60, B30)
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Channel Configuration: 8 Channels (Typically configured as 8 CT or mixed CT/VT depending on software mapping)
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Nominal Inputs: Supports 1A or 5A secondary currents (Field-programmable via relay settings)
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Sampling Resolution: High-definition A/D conversion for accurate waveform oscillography
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Isolation: Full galvanic isolation between field terminals and the relay backplane
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Diagnostic Monitoring: Real-time hardware health and channel integrity self-testing
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Operating Temperature: –40°C to +85°C (Utility Grade)
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Storage Temperature: –40°C to +85°C
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Humidity: 5% to 95% non-condensing
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Dimensions: 28.0 cm x 21.4 cm x 1.7 cm
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Weight: 0.9 kg (1.98 lbs)
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Mounting: Internal plug-in module for 6U UR Chassis
Primary Application Scenarios
The UR8NH (Part Number: UR8NH) is a versatile acquisition module used in several key protection schemes:
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Busbar Protection: Providing high-density CT inputs for the B30 or B90 relays to monitor multiple feeders in a differential zone.
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Transmission Line Protection: Interfacing with current and voltage transformers to provide data for distance (21) and line differential (87L) protection.
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Generator Monitoring: Capturing phase current and neutral voltage data for the G60 relay to perform stator ground fault and thermal protection.
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Power Quality Analysis: Providing high-speed sampling for harmonic analysis and event recording in substation environments.
What's clients say about us
Excellent Emergency Support!
Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.
Mark Thompson
Maintenance Manager, USAReliable Source for New Spares
Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.
Robert Hoffmann
Engineering Lead, GermanyTop-tier Service and Quality
We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.
Lucas Müller
Operations Director, GermanyRelated Products
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