Description

The ABB UNITROL 1020 UNS0119A-Z,V1(internal part number 3BHE030579R0003)is a high-performance digital excitation control board designed for the ABB UNITROL 1020 automatic voltage regulator(AVR)system.It serves as the central processing and regulation unit for synchronous generator field current control in thermal,hydro,and industrial power plants.

This compact printed circuit board integrates real-time voltage regulation,power system stabilization(PSS),protection logic,and communication interfaces—ensuring stable grid synchronization,transient response,and compliance with modern grid codes such as ENTSO-E and NERC.

Application Scenarios

During a sudden load rejection event at a 400 MW combined-cycle power plant in Germany,grid frequency spiked,risking generator overspeed and equipment damage.The ABB UNITROL 1020 UNS0119A-Z,V1 instantly activated its V/Hz limiter and reduced field current within 20 milliseconds,preventing magnetic core saturation and maintaining generator integrity.Operators later confirmed zero tripping—thanks to the board’s deterministic control algorithms and sub-cycle response.This case exemplifies how the UNS0119A-Z,V1 acts as the“nervous system”of generator excitation,transforming raw electrical feedback into precise,life-extending control actions that safeguard multi-million-dollar assets during grid disturbances.

Parameter

Main Parameters Value/Description

Product Model UNITROL 1020 UNS0119A-Z,V1

Internal Part Number 3BHE030579R0003

Manufacturer ABB Ltd.

Product Category Digital Excitation Control Board/AVR Processor Module

Compatible System ABB UNITROL 1020 Excitation System

Core Function Automatic Voltage Regulation(AVR),Field Current Control,PSS,Protection

Regulation Speed<10 ms response to±10%voltage step

Communication Interfaces RS-485(Modbus RTU),CAN bus,optional Ethernet via gateway

Supported Standards IEEE Std 421.5,IEC 60034-16,ENTSO-E Grid Code,NERC PRC-024

Operating Temperature 0°C to+55°C(industrial grade)

Power Supply 24 V DC(±10%),isolated input

Redundancy Support Yes–supports dual-channel hot standby configuration

Technical Principles and Innovative Values

Innovation Point 1:Real-Time Adaptive Voltage Regulation–The UNS0119A-Z,V1 uses a 32-bit DSP to execute PID-based AVR algorithms at 1 kHz sampling rates,dynamically adjusting field current to maintain terminal voltage within±0.5%despite load swings or grid faults.

Innovation Point 2:Integrated Power System Stabilizer(PSS)–Compliant with IEEE PSS2B/PSS4B models,it injects damping torque to suppress low-frequency oscillations(0.1–3 Hz),enhancing grid stability without external devices.

Innovation Point 3:Multi-Layer Protection Logic–Built-in V/Hz limiter,overexcitation protection(OXP),underexcitation limiter(UEL),and loss-of-field detection prevent generator damage during abnormal conditions.

Innovation Point 4:Seamless Retrofit&Diagnostics–Backward-compatible with legacy UNITROL 1000 systems;onboard LEDs and Modbus registers enable remote health monitoring and fault logging without shutdown.

Application Cases and Industry Value

At a pumped-storage hydro facility in Switzerland,aging analog exciters caused frequent voltage instability during mode transitions(pumping↔generation).After upgrading to ABB UNITROL 1020 systems featuring the UNS0119A-Z,V1 board,voltage regulation accuracy improved from±3%to±0.3%,and reactive power sharing between units became fully synchronized.The plant achieved 99.98%availability over three years,with zero excitation-related outages.In another case,an aluminum smelter in Canada replaced failed third-party AVRs with UNS0119A-Z,V1 modules to meet new FERC requirements.The result:full compliance with NERC PRC-024,reduced harmonic distortion,and extended brush life due to smoother field current control.

Related Product Combination Solutions

UNITROL 1020 Power Cabinet(e.g.,3BHE030580R0001):Houses thyristor bridges and cooling for complete excitation system

ABB 3BHE030581R0002(IO Board):Input/output interface module for PT/CT signals and breaker status

ABB 3BHE030582R0001(Gate Driver Board):Controls thyristor firing pulses based on UNS0119A-Z,V1 commands

ABB PCM600:Engineering tool for configuring,testing,and commissioning UNITROL 1020 systems

ABB AC 800PEC:High-end alternative for ultra-fast excitation in large turbo-generators

ABB 3BHE030583R0001(Redundancy Switch Module):Enables seamless failover in dual-UNS0119A-Z,V1 setups

ABB 3BHE030584R0001(Communication Gateway):Adds Ethernet/IP or IEC 61850 support to legacy UNITROL 1020

ABB 3BHE030585R0001(Field Flashing Unit):Provides initial rotor excitation during black-start scenarios

Installation,Maintenance,and Full-Cycle Support

The ABB UNITROL 1020 UNS0119A-Z,V1 is designed for plug-and-play installation in standard UNITROL 1020 control racks.It features keyed connectors and ESD-safe handling points to prevent misalignment or static damage.Before commissioning,ABB recommends verifying PT/CT scaling and running a closed-loop step-response test via PCM600 to validate tuning parameters.The board supports hot-swap in redundant configurations—minimizing downtime during replacements.

For maintenance,operators can access real-time diagnostics via Modbus registers(e.g.,regulator output,PSS status,fault codes)or front-panel LEDs indicating“RUN,”“ALARM,”and“FAULT.”Annual calibration checks ensure long-term accuracy,though the board’s solid-state design requires no routine component replacement.All units we supply undergo full functional validation—including simulated grid faults,communication stress tests,and thermal cycling—and include factory calibration certificates.

We provide comprehensive lifecycle support:from cross-reference verification and firmware version matching to on-site startup assistance and spare parts forecasting.Every UNS0119A-Z,V1 comes with a 12-month warranty,full test documentation,and compatibility assurance with your existing UNITROL 1020 infrastructure.

Contact us for a customized solution—whether you’re performing emergency repairs,modernizing legacy exciters,or ensuring regulatory compliance,our expertise ensures your ABB UNITROL 1020 UNS0119A-Z,V1 delivers unmatched reliability,precision,and grid resilience.

选择深圳长欣，选择放心，售后无忧 大量现货，当天顺丰发货！！！