ABB UNITROL 1020 UNS0119A-Z,V1 is an advanced excitation system designed

ABB UNITROL 1020 UNS0119A-Z,V1 – Excitation System & AVR Specifications
Overview
The ABB UNITROL 1020 UNS0119A-Z,V1 is an advanced excitation system designed for reliable and efficient generator control. It integrates automatic voltage regulator (AVR) functions with robust protection and monitoring features, ensuring stable generator operation under varying conditions.

Thanks to its compact design, IGBT-based power electronics, and microprocessor technology, the UNITROL 1020 provides 20A continuous excitation current and supports flexible integration with different power sources, including Permanent Magnet Generators (PMG) and auxiliary windings.

Its rugged aluminum base plate and compact form factor make it suitable for installation even in harsh, vibration-intensive environments, including direct mounting inside generator terminal boxes.

Technical Specifications
Feature    Details
Model    UNITROL 1020 UNS0119A-Z,V1
Manufacturer    ABB
Category    Excitation System / Automatic Voltage Regulator (AVR)
Input Voltage    AC: 0–300 VAC (3-phase, sinusoidal)
DC: 0–420 VDC
Excitation Output    Continuous current: 20 A DC
Operating temperature (full load): up to +40 °C
Response Time    3-phase measurement: < 20 ms
1-phase measurement: < 50 ms
Interfaces    Analog inputs: 3 (configurable)
Analog outputs: 2 (configurable)
Digital inputs: 4 (configurable)
Communication    Modbus TCP (remote access support)
Additional Features    Dual-channel support
Advanced load sharing
Rotating diode monitoring
Auto-synchronization
Integrated Ethernet & USB ports
Data & event logging
Mechanical Design    Solid aluminum base plate for high-vibration environments
Compact form factor for direct terminal-box mounting
Key Benefits
High reliability: IGBT power technology with microprocessor-based control

Flexible integration: Compatible with PMG and auxiliary windings

Fast response: Sub-20 ms voltage regulation with 3-phase sensing

Advanced monitoring: Real-time diagnostics, rotating diode supervision, and data logging

Rugged design: Withstands harsh industrial and vibration-heavy environments