GE UR9GV Analog Input Module

Configured for simultaneous current and voltage signal acquisition in Universal Relay (UR) series platforms, the GE Multilin UR9GV (UR9GV Analog Input Module) provides direct physical execution of current transformer (CT) and voltage transformer (VT) signal processing.

Hardware Specifications

Industrial Control and Protection Metrics

• Backplane Bus Communication Velocity: The UR9GV utilizes the UR series high-speed backplane bus to transmit synchronized current and voltage waveforms to the host relay processor. This interface is engineered for deterministic data throughput, ensuring that protection algorithms receive samples within the required relay scan cycles.
• Profinet / EtherNet/IP Deterministic Networks: While this module functions as an analog acquisition node, it integrates into the broader UR protection ecosystem, supporting deterministic network reporting for differential and phase-to-ground protection schemes via the host relay's communication infrastructure.
• I/O Density Scaling: The 8-channel architecture (4 CT / 4 VT) provides a versatile footprint for complex monitoring. The module supports differential, phase-to-phase, and phase-to-ground measurements, allowing for scalable protection logic in generator, transformer, motor, and feeder applications.
• Firmware Flash Compatibility: The module supports field-upgradeable logic and diagnostics integrated with the host relay firmware, ensuring that sensor calibration data and fault detection algorithms remain compatible with the latest software revisions.

Frequently Asked Questions

Q: Does the hot-swappable design apply to the CT and VT input leads?

A: No. While the UR9GV module is physically hot-swappable, the secondary circuits of the current transformers must be externally shorted via a test block before module removal. Similarly, VT circuits should be isolated to prevent hazardous voltage feedback. Extracting the module under load will result in an open-circuited CT, leading to high-voltage generation and potential equipment damage.

Q: Is this module capable of standalone metering without a host relay?

A: No. The UR9GV is a passive acquisition module designed to be powered and controlled by a UR relay chassis. It does not possess independent processing or communication capabilities and must be installed within a host relay to function.

Field Installation Guidelines

• Mechanical Seating: Align the module with the chassis guide rails and slide it into the relay housing until the latch mechanism engages. Ensure the module is firmly pressed to guarantee that the high-density backplane connectors are fully seated.
• Grounding: Ensure that all CT and VT inputs are properly referenced to the chassis ground bus as defined by the specific protection scheme. Proper grounding is necessary to minimize common-mode noise and maintain measurement accuracy across the differential and phase inputs.
• Diagnostic Verification: After installation, utilize the GE EnerVista software to verify that the module is correctly recognized by the UR chassis. Perform a loop check to ensure that current and voltage readings at the relay match the primary sensor input values.