GE Multilin UR Series UR8BV CT/VT Module

Product Overview

The GE UR-8BV is a CT/VT Module (Current Transformer / Voltage Transformer) from GE Multilin, designed for the UR Series Universal Relay platform. This module provides accurate analog signal acquisition from external CTs and VTs, converting current and voltage inputs into reliable digital data for protection, control, metering, and monitoring in power systems. The UR-8BV features enhanced diagnostics to detect internal failures and block tripping, ensuring system integrity.

The module supports 3-phase current and voltage inputs from CTs and VTs, with Class 0.2s or 0.5s accuracy depending on configuration. Its compact design and robust construction make it ideal for demanding substation and industrial environments.

Key Features

• Accurate measurement of current and voltage from external CTs and VTs
• Wide input range compatible with various CT and VT configurations
• Enhanced diagnostics to detect internal failures and block tripping
• Class 0.2s or 0.5s accuracy for high-precision metering
• Compact design for space-efficient installation
• Modular plug-and-play architecture for easy maintenance and upgrades
• Compatible with EnerVista UR Setup Software

Technical Specifications

Applications

• Power system protection — overcurrent, differential, and distance protection
• Transformer protection — current and voltage monitoring
• Generator protection — phase and ground fault detection
• Motor protection — load monitoring and fault identification
• Substation automation — SCADA integration and data acquisition

Compatibility

The UR-8BV is fully compatible with the GE Multilin UR Series universal relay family. It can replace older CT/VT units within the UR series and supports scalable upgrades. Always pair new CT/VT modules with compatible CPU modules to avoid hardware mismatch errors.

Installation Guide

1. Power Down: Completely de-energize the UR relay chassis. Never install or remove modules while energized.
2. ESD Protection: Wear a grounded ESD wrist strap before handling the module.
3. Slot Verification: Confirm the CT/VT slot position per the relay manual.
4. Module Insertion: Slide the UR-8BV into the designated slot, aligning the rear connector with the backplane.
5. Secure Mounting: Tighten the faceplate retention screws.
6. Wiring: Connect CT and VT secondary wiring per the UR series wiring diagram. Ensure secondary windings are properly grounded.
7. Configuration: Power on and configure CT/VT ratios and settings via EnerVista UR Setup software.

FAQ

Q: What does the "8B" order code signify?
A: The "8B" designates a CT/VT module with enhanced diagnostics and accurate analog signal acquisition capabilities.

Q: What accuracy class does the UR-8BV provide?
A: The UR-8BV provides Class 0.2s or 0.5s accuracy depending on the specific model configuration.

Q: How does the enhanced diagnostics feature work?
A: The module continuously monitors internal circuitry and can detect failures and block tripping to prevent false operations and protect system integrity.

Q: Is the UR-8BV compatible with older UR CPUs?
A: Compatibility depends on the CPU firmware version. New CT/VT modules should be paired with newer CPUs to avoid hardware mismatch errors.

Selection Tips

• Choose UR-8BV for high-accuracy CT/VT signal acquisition with enhanced diagnostics.
• For standard 4CT/4VT applications, consider the UR-8AH.
• For sensitive ground fault protection, consider the UR-8G, UR-8J, UR-8M, or UR-8R modules.
• Always verify CPU and firmware compatibility before ordering.

Ordering Information