ABB UNITROL 1020
Product Name
ABB UNITROL 1020 Automatic Voltage Regulator (AVR); Compact Excitation Controller for Small/Medium Synchronous Generators (UNITROL 1000 Family, ABB Power Grids/Process Automation).
Product Description
The UNITROL 1020 is a high-performance, all-in-one automatic voltage regulator (AVR) engineered for small/medium synchronous generators and industrial machines, leveraging microprocessor control and IGBT power electronics for precise voltage regulation, fast transient response, and robust fault handling. It integrates control logic, power circuits, and communication interfaces into a compact form factor, enabling easy installation and commissioning in genset, industrial, and backup power applications. Key capabilities include dual-channel redundancy, parallel load sharing, rotating diode monitoring, automatic synchronizing, and comprehensive event logging/trending via ABB’s CMT 1000 tool. It supports multiple communication protocols (Ethernet/Modbus, RS-485, USB) for seamless integration with SCADA/DCS and remote monitoring. Typical applications include diesel/gas gensets, CHP plants, industrial cogeneration, and backup power systems where stable generator voltage, parallel operation, and high availability are critical. Note: Always verify the exact part number (e.g., UNS0119A-Z/V1, 3BHE030579R0003) and generator rating to ensure compatibility before ordering spares or upgrades.
Key Parameters & Specifications (Consolidated, per ABB Official Data)
| Category | Specification | Notes (Critical Distinctions) |
|---|---|---|
| Manufacturer | ABB (Power Grids/Process Automation) | UNITROL 1000 family; AVR for small/medium generators |
| Model/Order Number | UNITROL 1020; typical variants: UNS0119A-Z/V1, 3BHE030579R0003 (confirm with unit label) | Base model+variant/revision |
| Product Type | Automatic Voltage Regulator (AVR); Excitation Controller | Not a PLC/DCS module or general-purpose drive |
| Primary Application | Small/medium synchronous generators, industrial machines, gensets, CHP, backup power | Parallel operation, load sharing, rotating diode monitoring |
| Excitation Output (Continuous) | Up to 20 A DC (at 55 °C ambient)
|
IGBT-based; derate at higher ambient temps |
| Auxiliary/Power Supply | 3-phase AC: 9–300 V AC; 1-phase AC: 50–300 V AC; DC: 18–300 V DC | Wide input range for flexible integration |
| Measurement Inputs | Generator voltage (3-phase, max 500 V AC); Generator current (1-phase, 1 A AC/5 A AC) | Standard CT/VT inputs for generator monitoring |
| Analog I/O | 3 analog inputs, 2 analog outputs (configurable); ±10 V reference output | For setpoints, feedback, and control signals |
| Digital I/O | 12 configurable digital I/O (up to 8 as outputs); optional extension via analog inputs (up to 6 extra digital inputs) | For interlocks, alarms, and sequence control |
| Communication Interfaces | 1× Ethernet (100 Mbit/s, Modbus/CMT 1000); 1× RS-485 (Modbus/reactive load sharing); 1× USB Type B (CMT 1000) | SNTP time sync supported |
| Internal Auxiliary Voltage | 24 V DC output (max 600 mA) for external relays/sensors | Power for auxiliary components |
| Environmental Ratings | Operating Temp: -40 °C to +70 °C; Storage Temp: -40 °C to +85 °C; Humidity: 5–95% RH (non-condensing); Vibration/Shock: Industrial grade |
