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Product Introduction
The GE UR 8NH CT/VT Module is a high-reliability measurement interface designed for GE UR Series Universal Relay systems. It is used to acquire and process three-phase current and voltage signals from current transformers (CTs) and voltage transformers (VTs), converting them into accurate low-level signals for protection, monitoring, and control applications.
This module is engineered for protection-critical environments where accurate electrical measurement is essential for system stability and fault response. Supporting 1A/5A selectable CT inputs and three-phase measurement capability, the UR 8NH ensures dependable data acquisition for relay protection, substation automation, and power system monitoring. Its robust design and strong isolation characteristics make it suitable for demanding utility and industrial applications.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | UR 8NH |
| Product Type | CT/VT Measurement Module |
| Series | GE UR Universal Relay Series |
| Function | Three-phase current and voltage measurement |
| Phase CT Inputs | 3 × (1 A / 5 A selectable) |
| Ground CT Input | Not specified / optional depending on system |
| Voltage Inputs (VTs) | Three-phase voltage measurement |
| Frequency | 50/60 Hz |
| Measurement Type | Protection-grade electrical monitoring |
| Accuracy Level | High-precision relay protection measurement |
| Isolation | Industrial high-voltage isolation |
| System Compatibility | GE UR Universal Relay systems |
| Mounting Type | Horizontal unit rack-mounted |
| Operating Environment | Power systems, substations, industrial plants |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 2.27 kg |
Applications
• Power System Protection:
Provides accurate three-phase CT/VT signals for relay-based protection functions such as overcurrent, differential, and voltage protection.
• Substation Automation Systems:
Used for real-time monitoring and control of electrical parameters in substations.
• Power Generation Facilities:
Supports generator and transformer protection with reliable electrical measurements.
• Industrial Power Distribution:
Ensures stable monitoring of electrical networks in large industrial plants.
• Energy Monitoring Systems:
Provides data for load analysis, fault detection, and system optimization.
Advantages
• Three-Phase Measurement Capability:
Enables complete system visibility across all phases, improving protection accuracy.
• Protection-Grade Signal Accuracy:
Delivers precise CT/VT measurement essential for relay decision-making.
• Flexible CT Input Support:
Supports both 1A and 5A current transformer configurations.
• High Electrical Isolation:
Ensures safe operation in high-voltage and fault-prone environments.
• Robust Industrial Construction:
Designed for continuous operation in substations and heavy industrial systems.
• Seamless Integration with UR Systems:
Fully compatible with GE UR Universal Relay architecture.
