Description

The ABB UNS4681V511 3BHE004074R0511​is a sophisticated numerical protection relay designed for comprehensive generator and motor protection applications.This advanced Intelligent Electronic Device(IED)combines multiple protection functions with advanced monitoring capabilities,providing complete equipment protection in a single compact unit.The ABB UNS4681V511 3BHE004074R0511​delivers exceptional reliability and precision for critical power generation applications,ensuring equipment safety and system stability through its comprehensive protection features and advanced communication capabilities.

Application Scenarios

In a 150MW hydroelectric power plant,the ABB UNS4681V511 3BHE004074R0511​was deployed as the primary protection for the main generator.The relay successfully detected and cleared a stator ground fault within 15ms,preventing equipment damage and minimizing outage time.The ABB UNS4681V511 3BHE004074R0511​comprehensive monitoring capabilities provided detailed fault analysis data,enabling maintenance teams to quickly identify and address the root cause of the issue.

Parameter

Parameter

Specification

Product Model

ABB UNS4681V511 3BHE004074R0511​

Manufacturer

ABB Group

Product Type

Generator Protection Relay

Protection Functions

Differential,Stator Ground,Loss of Field,Overexcitation

Measurement Accuracy

±0.5%for current,±0.2%for voltage

Operating Time

<20ms for most protection functions

Communication Protocols

IEC 61850,Modbus,DNP3.0

Input Ratings

1A/5A CT,110V/220V VT

Power Supply

48-250V DC/AC

Operating Temperature

-40°C to+70°C

Display

High-resolution LCD with intuitive interface

Certifications

IEC 60255,IEEE C37.90,UL 508

Dimensions

Standard 19″rack mounting

Weight

Approximately 8.2kg

Technical Principles and Innovative Values

Advanced Protection Algorithms:The ABB UNS4681V511 3BHE004074R0511​utilizes sophisticated digital signal processing with 64 samples per cycle sampling rate,ensuring accurate phasor measurement and precise fault detection.The relay’s adaptive characteristics automatically adjust protection settings based on operating conditions,providing optimal protection during startup,normal operation,and emergency conditions.This intelligent adaptation significantly reduces nuisance tripping while maintaining protection security.

Comprehensive Communication Capabilities:Featuring native IEC 61850 protocol support,the ABB UNS4681V511 3BHE004074R0511​enables seamless integration into modern digital substations.The relay supports both MMS and GOOSE communication,facilitating fast and reliable data exchange with other protection devices and control systems.This communication flexibility allows for coordinated protection schemes and remote monitoring capabilities.

Enhanced Diagnostic Features:The ABB UNS4681V511 3BHE004074R0511​includes comprehensive self-monitoring and condition monitoring functions that continuously assess the health of both the relay itself and the protected equipment.The device records detailed disturbance records with 256 samples per cycle resolution,providing valuable data for post-event analysis and system optimization.

Application Cases and Industry Value

In a combined cycle power plant,the ABB UNS4681V511 3BHE004074R0511​was implemented to protect a 200MVA gas turbine generator.The relay’s comprehensive protection functions including differential protection,reverse power protection,and overexcitation protection ensured reliable operation during frequent start-stop cycles.The installation resulted in a 35%reduction in false trips and improved fault clearance times.The ABB UNS4681V511 3BHE004074R0511​detailed event recording capability helped identify recurring issues with the excitation system,leading to proactive maintenance that prevented major failures.

A large industrial facility utilized the ABB UNS4681V511 3BHE004074R0511​for critical motor protection applications.The relay’s fast response time and accurate measurement capabilities ensured reliable operation during motor starting and abnormal conditions.The device’s thermal overload protection prevented equipment damage during locked rotor conditions,maintaining production continuity and improving plant availability.

Related Product Combination Solutions

ABB UNS4680V511​-Basic protection version

ABB UNS4682V511​-Enhanced version with additional functions

ABB RET670​-Transformer protection relay

ABB REF670​-Feeder protection relay

ABB REC670​-Busbar protection system

ABB REQ670​-Circuit breaker management

ABB COM600​-Station communication device

Installation and Maintenance

Installation Preparation:The ABB UNS4681V511 3BHE004074R0511​requires proper panel mounting with adequate clearance for wiring and ventilation.CT and VT connections must follow manufacturer guidelines to ensure measurement accuracy.The relay’s web interface provides step-by-step configuration guidance,while the front-panel display allows for local settings adjustment.

Maintenance Recommendations:Regular maintenance includes annual calibration checks and firmware updates.The ABB UNS4681V511 3BHE004074R0511​built-in self-test functions continuously monitor relay health,providing early warning of potential issues.Our technical support team offers comprehensive assistance with configuration,testing,and troubleshooting,ensuring optimal performance throughout the product lifecycle.

Lifecycle Management:The ABB UNS4681V511 3BHE004074R0511​is designed for 20-year service life with guaranteed long-term component availability.Our support includes migration planning for future upgrades and compatibility assurance with evolving industry standards.Complete documentation and training materials ensure proper operation and maintenance throughout the product’s lifecycle.

Contact us today to discuss how the ABB UNS4681V511 3BHE004074R0511​can enhance your generator protection system.Our experts will provide customized solution recommendations based on your specific application requirements and operational needs.

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