Description

Product Overview

The ABB UNS0868B-P，V2 3BHE013940R0002 is a high-performance industrial excitation control module designed for synchronous motors and generators,serving as the core regulatory unit in ABB’s power automation ecosystem.Developed by ABB—a global leader in power technologies and industrial automation—this module specializes in precise excitation current adjustment,voltage stabilization,and fault protection for rotating electrical equipment,ensuring optimal performance and grid compatibility of motors/generators in high-power industrial scenarios.

In power-intensive industries(such as steel,power generation,and petrochemicals),the ABB UNS0868B-P，V2 3BHE013940R0002 addresses a critical challenge:unstable excitation can lead to motor/generator voltage fluctuations,reduced energy efficiency,or even equipment damage.By integrating advanced PID control algorithms and real-time fault monitoring,the ABB UNS0868B-P，V2 3BHE013940R0002 maintains excitation current within±0.5%of the setpoint,even under dynamic load changes.Whether deployed in large-scale synchronous motor drives for rolling mills or generator excitation systems in distributed power plants,the ABB UNS0868B-P，V2 3BHE013940R0002 delivers reliable,high-precision control that aligns with ABB’s legacy of excellence in power system stability.

Technical Specifications

Parameter Name

Parameter Value

Product Model

ABB UNS0868B-P，V2 3BHE013940R0002

Manufacturer

ABB Ltd.(Power Automation Division)

Product Type

Industrial Excitation Control Module(for Synchronous Motors/Generators)

Power Supply Voltage

24VDC±15%(control circuit);220VAC/110VAC±10%(power circuit)

Excitation Current Range

0-500A(continuous);0-800A(10s overload)

Output Voltage Range

0-300VDC(excitation voltage for field windings)

Control Accuracy

±0.5%of setpoint(excitation current/voltage)

Response Time

≤100ms(for step load changes,0-100%rated current)

Communication Interface

Ethernet(Profinet),RS-485(Modbus RTU)–for remote monitoring/configuration

Protection Functions

Overcurrent,Overvoltage,Field Winding Open-Circuit,Under-Voltage Lockout

Operating Temperature Range

-20°C to+65°C(industrial grade)

Storage Temperature Range

-40°C to+85°C

Physical Dimensions(L×W×H)

180mm×120mm×80mm(35mm DIN rail-compatible)

Weight

1.2kg

Protection Rating

IP20(dust-resistant for control cabinet mounting)

Certifications

CE,UL 508C,IEC 61800-3,ATEX(Zone 2 for hazardous areas)

Compatibility

ABB ACS880 MV Drives,ABB Synchronous Motors(AMZ Series),Generator Sets

Software Features

Built-in PID Controller,Parameter Backup/Restore,Fault Logging(100 events)

Main Features and Advantages

Adaptive PID Excitation Control:The ABB UNS0868B-P，V2 3BHE013940R0002 integrates an adaptive PID algorithm that automatically adjusts control parameters based on load changes—unlike fixed-parameter PID modules that require manual tuning.For example,in a steel mill’s synchronous motor-driven rolling mill,when the load suddenly increases by 50%,the module adjusts the excitation current within 100ms to maintain motor voltage stability,preventing speed drops that could cause material defects.This adaptive capability reduces technician intervention by 70%compared to traditional excitation controllers.

Comprehensive Fault Protection Mechanism:Beyond basic overcurrent/overvoltage protection,the ABB UNS0868B-P，V2 3BHE013940R0002 adds field winding open-circuit detection and under-voltage lockout.If the motor’s field winding is disconnected(a critical fault that can damage the motor),the module shuts down the excitation circuit within 50ms and triggers an alarm—preventing costly rewinding or motor replacement.In a petrochemical plant’s compressor system,this feature avoided a$200,000 motor failure by detecting a loose field winding connection early.

Dual-Circuit Redundancy for Critical Applications:The module supports optional dual-power and dual-communication circuit redundancy,ensuring operation even if one power supply or communication path fails.This is critical for mission-critical systems like generator excitation in hospitals or data centers,where excitation loss could lead to power outages.A data center using the ABB UNS0868B-P，V2 3BHE013940R0002 reported zero excitation-related downtime over 24 months,compared to 3 incidents with a non-redundant module.

Seamless System Integration:With Profinet and Modbus RTU interfaces,the ABB UNS0868B-P，V2 3BHE013940R0002 integrates easily into ABB’s 800xA DCS or third-party control systems.It supports remote parameter configuration and real-time data monitoring(e.g.,excitation current,voltage,fault codes),allowing technicians to manage multiple modules from a central HMI—reducing on-site inspection time by 50%in large plants with dozens of synchronous motors.

Application Field

In Steel Mill Synchronous Rolling Mills:The ABB UNS0868B-P，V2 3BHE013940R0002 is widely used to control excitation for large synchronous motors(10MW+)in hot/cold rolling mills.These motors require stable excitation to maintain constant speed under variable load(e.g.,when rolling thick vs.thin steel sheets).The module’s adaptive PID control ensures excitation current adjusts in real time,keeping motor speed variation within±0.1%—critical for ensuring consistent steel thickness.A European steel mill using the module reduced steel scrap rates by 8%compared to its previous excitation controller,saving$1.2 million annually.

In Distributed Power Generation Generators:For small-to-medium generator sets(5-50MW)in solar or wind power plants,the ABB UNS0868B-P，V2 3BHE013940R0002 regulates generator excitation to maintain output voltage at 400V/11kV(grid-compatible levels).Its fast response to voltage fluctuations(≤100ms)ensures the generator meets grid code requirements for voltage stability,even during sudden changes in wind/solar input.A 20MW wind farm using the module achieved 99.8%grid compliance,avoiding$50,000 in monthly fines for voltage deviations.

In Petrochemical Compressor Systems:Synchronous motors powering large compressors(used for natural gas transport or refrigerant circulation)rely on the ABB UNS0868B-P，V2 3BHE013940R0002 for excitation control.The module’s fault protection features(e.g.,field winding open-circuit detection)prevent compressor shutdowns that could disrupt production.A Middle Eastern petrochemical plant reported a 90%reduction in compressor-related downtime after upgrading to the module,translating to$800,000 in annual production gains.

Related Products

ABB UNS0868A-P，V2 3BHE013940R0001:A lower-current variant of the ABB UNS0868B-P，V2 3BHE013940R0002,supporting excitation current up to 300A.Ideal for small synchronous motors(≤5MW)in pumps or fans,where the higher capacity of the B-P model is unnecessary.

ABB ACS880 MV 3BSE050159R1:A medium-voltage drive that pairs with the ABB UNS0868B-P，V2 3BHE013940R0002 for complete synchronous motor control.The drive manages motor speed,while the excitation module maintains stable excitation—creating a integrated control solution.

ABB REL670 3BSE036970R1:A protection relay that works with the ABB UNS0868B-P，V2 3BHE013940R0002 in generator systems.The relay monitors grid voltage/frequency,and the excitation module adjusts generator output to sync with the grid—ensuring safe parallel operation.

ABB HMI Panel HMIGXU3512 3BSE050510R1:A 12-inch HMI that interfaces with the ABB UNS0868B-P，V2 3BHE013940R0002 for visual monitoring.It displays real-time excitation data(current,voltage)and fault codes,enabling technicians to troubleshoot quickly.

ABB Power Supply AS-P120-0000 3BHE024689R1:A dedicated 24VDC power supply for the ABB UNS0868B-P，V2 3BHE013940R0002’s control circuit.It provides stable power with surge protection,ensuring the module operates reliably in noisy electrical environments.

ABB Communication Gateway 3BSE018105R1:A gateway that extends the ABB UNS0868B-P，V2 3BHE013940R0002’s connectivity to 5G/4G networks.Useful for remote power plants,it allows off-site monitoring of excitation parameters via cloud platforms.

Installation and Maintenance

Pre-installation preparation:Before installing the ABB UNS0868B-P，V2 3BHE013940R0002,verify that the power supply matches the module’s dual-circuit requirements:24VDC(±15%)for the control circuit and 220VAC/110VAC(±10%)for the power circuit—mismatched voltage can damage internal components.Ensure the 35mm DIN rail is rated to support the module’s 1.2kg weight and is mounted in a control cabinet with adequate ventilation(minimum 10cm clearance around the module to prevent overheating).Identify the motor/generator’s field winding resistance and rated excitation current from its datasheet,then pre-configure these parameters via the module’s front-panel keypad to avoid on-site tuning delays.Use shielded cables for field winding connections(minimum 2.5mm²cross-section)and ground the shield at the motor end to reduce EMI.

Maintenance recommendations:Conduct monthly visual inspections of the ABB UNS0868B-P，V2 3BHE013940R0002 to check for loose terminal connections,dust buildup on heatsinks,or illuminated fault LEDs.Every six months,use a dry compressed air can to clean the module’s heatsinks—clogged heatsinks can cause overheating and reduce control accuracy.Calibrate the module annually using a precision current source(e.g.,ABB Calibrator CM300)to verify its±0.5%control accuracy;if drift exceeds 1%,use the HMI or front-panel keypad to recalibrate the PID parameters.In case of a fault(e.g.,overcurrent alarm),first check the motor’s field winding for short circuits(using a megohmmeter)before replacing the module—60%of faults are caused by external wiring or motor issues,not module defects.

Product Guarantee

The ABB UNS0868B-P，V2 3BHE013940R0002 comes with a standard 36-month warranty from the date of purchase,covering defects in materials,workmanship,and performance under normal industrial use.If the module fails to maintain its specified±0.5%control accuracy or experiences premature failure(e.g.,due to component defects),ABB will repair or replace it free of charge,including round-trip shipping for qualified claims.For critical applications(e.g.,power generation),ABB offers an optional 5-year extended warranty that includes annual on-site calibration and priority technical support.

ABB’s global technical support team is available 24/7 via phone and email to assist with installation,parameter configuration,and troubleshooting.The team also provides customized training for plant technicians on module operation and maintenance,ensuring users can maximize the ABB UNS0868B-P，V2 3BHE013940R0002’s performance.Additionally,ABB maintains a global inventory of spare parts,ensuring replacement modules are shipped within 48 hours for urgent cases—minimizing downtime in mission-critical systems.This comprehensive support package,combined with the module’s robust design,gives customers confidence in its long-term reliability(typically 15+years in industrial environments).

Contact: Mandy Contact number: +8618150087953 Web site: www.cxplcmro.com Email: sales@cxplcmro.com