Description
Key Technical Specifications
- Model Number: UR8AH
- Manufacturer: GE Multilin
- Series: UR Series Universal Relays
- Product Type: CT/VT Input Module
- Phase CT Inputs: 3 channels (1A / 5A selectable)
- Ground CT Input: 1 channel (1A / 5A selectable)
- VT Inputs: 4 Voltage Transformer channels
- Configuration Software: EnerVista UR Setup
- Application: Power System Protection, Monitoring, and Control
- Mounting: Plug-in module for UR Relay Chassis
Functional Role & Application Analysis
The GE UR8AH is a specialized CT/VT input module designed exclusively for the GE Multilin UR Series Universal Relays. Its core role is to safely step down and isolate high-voltage, high-current signals from the power grid into precise, measurable values that the relay’s internal processor can analyze. This module solves the critical need for accurate electrical measurement and system grounding, directly enabling the relay to detect faults like overcurrent, overvoltage, and phase imbalance.
Typical use cases include:
- Power Generation & Transmission: Deployed in substations and power plants to monitor generators, transformers, and transmission lines for grid stability.
- Industrial Power Distribution: Utilized in heavy manufacturing and petrochemical facilities to protect critical motor control centers and switchgear.
- Legacy System Maintenance: Serves as an essential replacement part for aging UR Series relays to prevent catastrophic electrical failures and unplanned outages.
Our Quality Standard & Testing Process
We understand that the cost of an unreliable protection relay part in a power grid is far greater than its purchase price. We have established a rigorous, multi-stage testing process to ensure every UR8AH module we ship is 100% functional.
- Visual & Component Inspection: All boards undergo professional cleaning and visual inspection. We check for physical damage, corrosion, and verify the integrity of precision resistors and isolation components.
- Live System Test: The module is installed in a live Multilin UR test chassis and run for 24 hours to verify continuous operation, power distribution stability, and backplane communication.
- Full-Function Diagnostics: We simulate 1A/5A CT signals and VT voltages across all channels to ensure measurement accuracy, scaling, and isolation meet original factory specifications.
- Warranty Backing: Only parts that pass all diagnostic tests are approved for shipment and backed by our full 12-month warranty.
GE-UR8AH
Compatibility & Migration Paths
To ensure this UR8AH is 100% compatible with your system, you must check these key compatibility points. Failure to verify this is a common project risk that can lead to extended grid downtime.
- Relay Chassis Compatibility: You must confirm your existing UR Relay chassis (e.g., UR6, UR9) supports the UR8AH module. It is not universally compatible with all GE protection relays.
- Configuration Software: Verify your engineering team has the correct version of EnerVista UR Setup software to configure the CT/VT scaling parameters after installation.
- Replacement & Alternatives: Ensure the exact model number matches. Different suffixes may indicate variations in CT/VT channel configurations or factory calibration.
- Get Expert Help: Unsure about your relay’s compatibility? Contact our technical team today for a free compatibility check before ordering.
