GE UR9AH

Description

Product Description

GE UR9AH is a high-accuracy, nine-channel analog input module designed for the GE Multilin Universal Relay (UR) series. This module, the UR9AH, is a critical expansion card that enables a UR-series protective relay (such as a UR F60, UR T60, or others) to directly monitor AC voltage and current waveforms from potential transformers (PTs/VTs) and current transformers (CTs). The primary function of the GE UR9AH module is to provide the relay with the high-fidelity, isolated analog measurements necessary for advanced protection, metering, and power quality analysis. It converts the analog signals into digital data for the relay’s processor, which executes complex algorithms for differential protection, distance protection, overcurrent, and voltage-based functions. Integrating the UR9AH directly into the protective relay consolidates what would require multiple external transducers and PLC analog cards into a single, highly reliable device. For system designers, the GE UR9AH is an essential component for building comprehensive electrical protection and monitoring systems within substations and high-voltage switchgear.

Product Parameters / Technical Specifications

• Manufacturer: GE (GE Grid Solutions, part of the Multilin brand)
• Series: Universal Relay (UR) Series Expansion Module
• Functional Designation: 9-Channel Analog Input Module (for voltage and current)
• Input Channels: Nine fully isolated analog input channels. These are typically configured as:
  • Three Current Channels (IA, IB, IC): For direct connection to CT secondaries (e.g., 1A or 5A).
  • Three Voltage Channels (VA, VB, VC): For direct connection to VT/PT secondaries (e.g., 120V or 69.3V).
  • Three Auxiliary Voltage Channels (VS1, VS2, VS3): For additional voltages (e.g., neutral voltage, synchrocheck, or bus voltage).
• Input Ratings: Designed for standard instrument transformer secondary ratings. Current inputs handle 1A or 5A continuous; voltage inputs handle up to 300V continuous.
• Accuracy: High accuracy class (typically 0.2% or better for metering) suitable for both protection and revenue-grade metering.
• Isolation: Channels are isolated from each other and from the relay’s internal logic.
• Communication: Interfaces directly with the UR relay’s main processor via an internal bus when plugged into an available slot.
• Configuration: Fully configured using the UR relay’s setup software (EnerVista UR Setup).

Advantages and Key Features

• Consolidated Protection & Metering: Replaces multiple discrete devices (transducers, meters, separate I/O cards) by providing high-accuracy analog conversion directly within the protection relay, simplifying panel design and wiring.
• High-Fidelity Waveform Capture: Provides the relay with full waveform data, enabling advanced functions like harmonic analysis, sequence component calculation, and detailed oscillographic fault recording.
• Enhanced System Reliability: By minimizing external wiring and components between the CT/PT and the relay’s processor, it reduces potential points of failure and improves the security of the protection scheme.
• Flexible Application: The nine configurable channels allow the GE UR9AH to support a wide range of applications, from simple feeder protection to complex transformer differential, generator protection, or busbar protection schemes.
• Seamless Integration: Becomes a native part of the UR relay. All measured values (magnitudes, angles, harmonics) are instantly available for use in the relay’s protection elements (FlexLogic™) and are communicated over the relay’s network ports.
• Hot-Swappable Design: Can typically be installed or replaced without de-energizing the main UR relay chassis.

Application Cases in Industry

• Transformer Differential Protection: Used in a UR T60 relay, where the UR9AH module provides the multiple three-phase current inputs needed for the differential protection of a power transformer (windings 1, 2, and possibly 3).
• Feeder & Line Protection: In a UR F60 relay, it provides the three-phase currents and voltages for distance (21), directional overcurrent (67), and voltage-controlled/restrained overcurrent (51V) protection.
• Generator Protection: Used in a UR G60 relay to provide stator current and voltage inputs for 100% stator ground fault (64G), loss of field (40), and reverse power (32) protection.
• Substation Automation: Serves as the primary analog interface for a UR relay acting as a bay controller or intelligent electronic device (IED) in a digital substation, providing data for SCADA, metering, and protection.

Comparison with Competing Products

Selection Suggestions and Precautions

1. Verify Relay Compatibility: The GE UR9AH module is not universal for all UR relays. You must confirm it is compatible with your specific UR relay model (e.g., F60, T60, G60) and its firmware version. Consult the relay’s ordering guide or hardware manual.
2. CT/PT Secondary Rating Match: Critical. Configure the module’s settings in EnerVista UR Setup to match the exact secondary ratings of your connected CTs (1A or 5A) and VTs (e.g., 120V, 115V, 69.3V). Incorrect settings will lead to erroneous measurements and maloperation.
3. Slot and Resource Allocation: The module must be installed in a designated expansion slot. Also, ensure the UR relay’s firmware license supports the advanced protection functions (e.g., differential, distance) that will use the UR9AH inputs.
4. Wiring and Burden: Use proper gauge wiring. While the module’s burden is very low, ensure the total burden on the CT/VT circuits (including wiring) does not exceed the transformer’s rating, especially for metering-class accuracy.
5. Sourcing from Authorized Channels: Purchase this module from authorized GE Grid Solutions distributors or highly reputable suppliers specializing in protection relays to ensure authenticity and firmware compatibility.

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