Overview
The GE UR8GV, also cataloged as the UR8GV CT/VT Input Module, operates as a dedicated hardware component for analog current and voltage signal acquisition within GE Multilin Universal Relay platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR8GV |
| Brand | General Electric (GE Multilin) |
| Product Type | CT/VT Input Module |
| Series | Multilin Universal Relay (UR Series) |
| Origin | USA / Canada manufacturing locations depending on configuration |
| Weight | Approx. 0.5 kg to 1 kg |
| Dimensions | Approx. 15 cm L x 18 cm W x 4 cm H |
| Operating Temp | -40 deg C to +60 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Power Consumption | Supplied through UR relay rack backplane |
| Input Interface | Current Transformer (CT) and Voltage Transformer (VT) inputs |
| Current Inputs | CT measurement channels |
| Voltage Inputs | VT measurement channels |
| Communication Interface | Internal UR high-speed backplane bus |
| Configuration Software | EnerVista UR Setup |
| Mounting Type | UR chassis plug-in module |
| Measurement Functions | Current, voltage, RMS, metering, and protection calculations |
| Frequency Range | 20 Hz to 65 Hz |
| CT Secondary Input | 1 A or 5 A nominal |
| Application | Generator, transformer, feeder, motor, and transmission protection |
Backplane Communication and I/O Architecture
The UR8GV module uses the GE Multilin UR modular architecture with internal backplane communication between the measurement module and the relay CPU. The module transfers sampled CT and VT data through the relay hardware bus for protection algorithms, metering functions, event recording, and fault analysis.
The GE industrial control platform architecture supports modular I/O density scaling through interchangeable hardware cards. The UR8GV integrates with UR chassis configurations and maintains firmware flash compatibility with supported UR relay CPU assemblies.
Frequently Asked Questions
Q: What type of electrical signals does the GE UR8GV process?
A: The UR8GV processes analog electrical signals from current transformers and voltage transformers for relay measurement and protection calculations.
Q: How is the UR8GV connected to the relay processor?
A: The module connects through the internal UR relay backplane bus and exchanges measurement data with the installed CPU module.
Q: Can the UR8GV be installed outside the UR relay chassis?
A: No. The UR8GV is designed as a plug-in module installed inside the GE Multilin Universal Relay chassis.
Field Installation Guidelines
- Install the UR8GV module only in a compatible GE Multilin Universal Relay chassis slot.
- Verify CT and VT secondary wiring polarity before connecting field conductors.
- Use shielded wiring practices for analog measurement circuits where required by the installation environment.
- Separate CT/VT signal wiring from high-current power cables to reduce electromagnetic interference.
- Confirm module seating and backplane connector engagement before energizing the relay system.
- Perform relay configuration verification through EnerVista UR Setup after hardware installation.
