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Product Overview
The GE Multilin UR8LA module delivers a dependable analog interface for CT and VT inputs within the GE Universal Relay family. It captures current and voltage signals with high accuracy, allowing the relay to execute precise protection, metering, and monitoring functions. Moreover, its stable performance helps engineers maintain reliable measurements during demanding grid operations. The module integrates seamlessly into UR platforms, and it ensures consistent data fidelity even in harsh substation environments. In addition, its flexible input ranges allow utilities and industrial facilities to deploy a single module across multiple protection schemes.
Key Features and Functional Highlights
The UR8LA offers accurate CT and VT signal acquisition that supports advanced protection algorithms and high-resolution metering. Its 1 A and 5 A CT options accommodate a wide range of feeder and transformer installations. Furthermore, the module uses proven GE Multilin hardware that maintains measurement stability across wide temperature variations. Engineers appreciate its straightforward integration, because installation requires no complex configuration. Therefore, the UR8LA improves relay performance and ensures dependable long-term operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Module Type | CT/VT Module |
| Series | GE Multilin UR (Universal Relays) |
| CT Inputs | 8 channels |
| VT Inputs | 4 channels |
| CT Nominal Range | 1 A or 5 A |
| VT Nominal Range | 67 V or 120 V |
| Accuracy | Class 0.2 metering accuracy |
| Sampling Rate | High-speed sampling for protection |
| Operating Temperature | -40°C to +70°C |
| Humidity Range | 0%–95% non-condensing |
| Weight | 0.6 kg |
| Compliance | IEC 61850, ANSI/IEEE standards |
Typical Applications and System Integration
The UR8LA supports protection and control systems in substations and industrial power networks. It feeds accurate analog data into UR relays that safeguard transformers, motors, generators, and transmission lines. Moreover, utilities adopt this module when upgrading legacy protection systems because it improves measurement precision without altering existing CT and VT wiring. Integration into digital substations is also straightforward, and the module aligns with modern IEC 61850 architectures.
Support, Reliability, and Maintenance
The UR8LA is built for long service life in demanding electrical environments. Its rugged design resists vibration, temperature swings, and electrical noise, which ensures dependable relay performance. Routine maintenance requires minimal effort because the module supports stable calibration over long operating periods. Additionally, GE Multilin provides extensive documentation and field-proven service experience, which helps operators maintain system reliability with confidence.
FAQ
Q1: Can the UR8LA handle mixed CT ranges in one installation?
Yes, it supports both 1 A and 5 A CT circuits, and users can configure ranges per channel.
Q2: Is the module suitable for digital substation projects?
Yes, it integrates cleanly with IEC 61850-based UR platforms and supports modern substation architectures.
Q3: What benefits does Class 0.2 accuracy provide?
It delivers precise metering values, which improves load studies, event analysis, and protection reliability.
Q4: Does the UR8LA require periodic calibration?
Calibration intervals are long, and most sites perform checks only during scheduled relay maintenance.
Q5: Is the module compatible with all UR chassis types?
It fits standard GE UR relay frames and works with multiple protection and control configurations.
