ABB UNITROL 1005 3BHE043576R0011 Digital Excitation Regulator (AVR)

ABB UNITROL 1005 Digital Excitation Regulator (AVR)
I. Basic Product Information
Model: UNITROL 1005 (the smallest power model in the UNITROL 1000 series)
Original part number example: 3BHE043576R0011 (UNITROL 1005-0011 ECO standard version)
Brand: ABB Swiss excitation product line
Category: Compact IGBT digital synchronous generator excitation automatic voltage regulation device AVR
Position: Special for small-capacity synchronous generators, rated excitation 5A, peak 10A, compatible with ≤ 3.5MVA diesel / gas / hydro / marine synchronous generators eero

Core Electrical Power Parameters
Excitation output capacity (IGBT power loop)
Continuous rated excitation current: 5A DC
Peak excitation current: 10A DC (short time)
Supports four power supply methods: self-excited, PMG permanent magnet machine, generator auxiliary winding, DC battery, excitation power supply maximum 3kVAeero
Terminal voltage measurement
Single-phase / three-phase PT voltage acquisition, compatible with 100/110/230/400/690V units
Current sampling
Single-channel CT current input (1A/5A software switch), used for parallel reactive droop, constant PF/VAR control
Device working power supply
Wide AC/DC applicable, AC 85~264V / DC 88~264V, compatible with factory DC panels, AC control power supply
Measurement circuit
Real-time acquisition of terminal voltage, stator current, excitation current, excitation voltage, rectifier input voltage

Hardware Interface Configuration
1. Communication Interface
USB: Local direct connection to CMT1000 debugging software, can read/write parameters and firmware without power supply
Ethernet RJ45: Modbus TCP, remote debugging, IEEE1588 time synchronization
Optional RS485/CAN bus expansion
2. I/O Terminals (spring cage terminals, shock-resistant)
Analog input: 2 channels (remote voltage setpoint, external limit signal)
Digital input DI: 8 channels (rise / fall voltage, manual / automatic, grid connection allowed, fault locking, etc.)
Digital output DO: 4 channels (fault alarm, excitation trip, operation status, strong excitation action)
3. Structure and Protection
Full aluminum base, highly resistant to vibration (5g peak), suitable for ship, mining vibration environments
Protection IP20, standard cabinet DIN rail installation
No local LCD HMI, only panel status LED indicators (operation / fault / communication / strong excitation)
The overall machine is of compact size, smaller in volume compared to 1010/1020

Two major software versions and function packages
1) ECO Complete Version (mainstream in the field, order suffix 0011)
Full-function grid connection / parallel unit scheme:
Basic AVR constant voltage regulation
Constant reactive VAR, constant power factor PF superimposed regulation
Reactive droop compensation, multi-unit parallel reactive equalization
Soft excitation rise, voltage ramp, grid voltage matching
Complete excitation limit: OEL over-excitation, UEL under-excitation, V/Hz voltage frequency limit
FRT grid fault穿越， boost control
Thyristor crowbar de-magnetization trigger output (drives external fuse trip)
2-hour continuous operation curve recording， event fault log with timestamp
2) Light Compact Version

Only single-unit island operation， no parallel reactive control， only basic AVR， simple fault recording， does not support grid guideline FRT function ABB Group V. Core Control and Protection Functions
Multiple operation mode switching
Automatic voltage AVR, constant excitation current FCR, constant power factor PF, constant reactive power VAR
Core for parallel grid connection
Static reactive power droop, multi-machine reactive power balanced distribution, synchronous grid connection voltage matching
Complete protection and limitation
Overexcitation limit OEL, inverse-time overheat protection
Underexcitation UEL (to prevent phase lag instability)
V/Hz low-frequency limit (to prevent core magnetic saturation)
Machine terminal overvoltage, PT disconnection monitoring, excitation circuit disconnection protection
Grid adaptability
Support for wind power / distributed power grid connection standards, low voltage ride-through FRT algorithm
Self-diagnosis
Power-on self-check, real-time loop monitoring, fault code storage, CMT1000 one-click export of waveforms