ABB UNITROL1020 UNS0119A-Z,V1 3BHE030579R0001 Compact Digital Excitation Automatic Voltage Regulator

Description

Main Functions Real‑time sampling of generator VT voltage and CT current signals, execute AVR automatic‑voltage closed‑loop regulation calculation. Multiple selectable control modes: auto‑voltage regulation, manual field‑current regulation, constant reactive‑power control, constant power‑factor control. Built‑in full‑set excitation‑limit and protection functions: over‑excitation limit, under‑excitation limit, V/Hz limitation, field‑current over‑current protection. Optional IEEE 421.5 compliant PSS power‑system stabilizer for grid‑connected generatorseero. Rotating‑diode monitoring function for brushless excitation systems. Integrated IGBT power stage provides adjustable DC excitation current for generator exciter. Collect field‑site binary status signals; output relay‑contact signals for alarm, trip and protection blocking. Event logging and disturbance‑recording function with time‑stamp, support SNTP time synchronization for post‑fault waveform analysis. Automatic synchronisation and reactive‑power load‑sharing for parallel‑running generators. Multiple communication interfaces realize data exchange with plant DCS and upper‑level monitoring system. Hardware self‑diagnosis detects internal circuit, measuring‑loop faults, upload fault codes to local HMI or DCS. Parameter configuration, debugging and firmware upgrade are completed by ABB CMT1000 commissioning software.

Installation Requirement Wall‑mount or rack‑mount installation inside excitation cabinet. High‑power cables and weak‑signal measuring cables shall be routed separately. Ensure reliable protective grounding of the cabinet. Auxiliary power supply shall stay within rated operating range. After unit replacement, confirm hardware full part‑number UNS0119A‑Z,V1 / 3BHE030579R0001 strictly matches original project configuration, download complete excitation configuration file. Perform voltage‑loop calibration, excitation‑output test, I/O point‑to‑point test and communication debugging. Different hardware revisions and software packages cannot be directly interchanged without software adaptation. Do not put into service until no hardware self‑diagnosis fault alarm exists.

Typical Application Scenarios Compact digital excitation regulator for small‑and‑medium‑sized synchronous generators in hydropower stations, diesel‑gas power plants, industrial captive power stations and marine vessels, used for excitation‑system maintenance and spare‑part replacement.

Key Features

1. High‑performance integrated AVR within UNITROL1000 series, equipped with local HMI display and keypad for convenient on‑site operation.
2. Multiple optional software packages, support rotating‑diode monitoring, automatic synchronisation and load‑sharing for parallel‑generator systems.
3. Fast dynamic response and high‑precision voltage‑regulation performance, adapt to island‑mode and grid‑parallel working conditions.
4. Multiple standard communication interfaces, easy to connect with plant DCS monitoring system.
5. Robust cabinet‑mount mechanical structure, good anti‑vibration performance for harsh industrial environment.
6. Strict attention to full part‑number and hardware‑version matching during spare‑part replacement; cannot be directly substituted by UNITROL1010 without adaptation.