UR8CH | GE Multilin UR 8CH CT/VT Module

Product Overview

The GE UR-8CH is a CT/VT Module (Current Transformer / Voltage Transformer) from GE Multilin, designed for the UR Series Universal Relay platform. This module features eight independent channels suitable for CT or VT inputs, ensuring flexibility in configuration for diverse protection schemes. The UR-8CH supports differential protection, concurrent split-phase protection, and distance protection, making it a versatile solution for power system management.

The module incorporates enhanced diagnostics capabilities to bolster system reliability and facilitate proactive maintenance. It communicates seamlessly with SCADA and other control systems through Modbus RTU and DNP3 protocols.

Key Features

• 8 independent channels for CT or VT inputs — flexible configuration
• Supports multiple protection schemes: differential, concurrent split-phase, and distance protection
• Enhanced diagnostics for system reliability and proactive maintenance
• Communication capabilities via Modbus RTU and DNP3 protocols
• CT Input Range: 0.5 A to 5 A
• VT Input Range: 5 V to 250 V
• CT Accuracy: Class 0.5
• VT Accuracy: Class 0.2
• Compatible with EnerVista UR Setup Software

Technical Specifications

Applications

• Protection of feeders, transformers, and generators
• Differential protection schemes
• Concurrent split-phase protection
• Distance protection for transmission lines
• Control of switching operations
• Automation of substation processes

Compatibility

The UR-8CH is fully compatible with the GE Multilin UR Series universal relay family. Its eight configurable channels provide greater flexibility compared to standard 4CT/4VT modules. 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-8CH 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 channel assignments via EnerVista UR Setup software.

FAQ

Q: What does the "8C" order code signify?
A: The "8C" designates a CT/VT module with 8 configurable channels for flexible CT/VT input assignment.

Q: Can all 8 channels be used as CT inputs?
A: The UR-8CH supports flexible configuration — channels can be assigned as CT or VT inputs depending on application requirements.

Q: What protection schemes are supported?
A: The UR-8CH supports differential protection, concurrent split-phase protection, and distance protection.

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

Selection Tips

• Choose UR-8CH when you need 8 configurable CT/VT channels for flexible protection schemes.
• For standard 4CT/4VT applications, consider the UR-8AH.
• For enhanced diagnostics, consider the UR-8LH or UR-8NH.
• Always verify CPU and firmware compatibility before ordering.

Ordering Information