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ABB UNITROL 1020 Automatic Voltage Regulator (AVR)

ABBUNITROL 1020 is a high-performance digital AVR developed for excitation control of synchronous generators and motors. It continuously monitors generator terminal voltage and automatically adjusts excitation current to maintain stable voltage output under varying load conditions.

The regulator incorporates advanced microprocessor technology, intelligent control algorithms, and high-speed IGBT semiconductor devices to ensure fast response and exceptional regulation accuracy. UNITROL 1020 supports automatic voltage regulation, reactive power control, power factor control, and manual excitation operation, enabling flexible operation across a wide range of applications.

One of the key advantages of UNITROL 1020 is its support for dual-channel redundancy, generator synchronization, rotating diode monitoring, and load sharing between generators operating in parallel. These capabilities help improve system availability and reliability in critical power generation installations.

With integrated Ethernet, USB, and RS-485 communication interfaces, the regulator can easily connect to SCADA systems, plant control systems, and remote monitoring platforms. ABB's CMT1000 software further simplifies commissioning, configuration, diagnostics, and maintenance activities.

UNITROL 1020

Technical Specifications：

Parameter	Specification

Manufacturer

ABB

Model

UNITROL 1020

Product Type

Digital Automatic Voltage Regulator (AVR)

Application

Generator Excitation Control

Generator Size Range

100 kVA to 80 MVA

Continuous Excitation Current

Up to 20 ADC

Short-Time Overload Current

Up to 38 A (10 seconds)

Voltage Regulation Accuracy

±0.2%

Response Time

≤ 5 ms

Control Modes

AVR, FCR, VAR Control, Power Factor Control

Communication Interfaces

Ethernet, USB, RS-485

Protocols

Modbus TCP, Modbus RTU

Auxiliary Supply

AC/DC Universal Input

Operating Temperature

-40°C to +70°C

Protection Class

IP20

Certifications

CE, UL, CSA, DNV

Configuration Software

ABB CMT1000

UNITROL 1020

Key Features and Benefits：

Precise Voltage Regulation

Maintains stable generator voltage with high regulation accuracy, improving power quality and system stability.

High Excitation Performance

Provides continuous excitation current up to 20 ADC, suitable for demanding generator applications.

Advanced Generator Protection

Integrated protection functions include overexcitation, underexcitation, V/Hz limitation, fault monitoring, and voltage supervision.

Dual-Channel Redundancy

Supports redundant operation to maximize availability in critical power generation facilities.

Parallel Generator Operation

Built-in load sharing and automatic synchronization capabilities simplify multi-generator installations.

Flexible Communication

Supports Ethernet, USB, and RS-485 connectivity for seamless integration with modern automation systems.

Easy Commissioning

ABB CMT1000 software offers parameter configuration, diagnostics, event recording, monitoring, and tuning tools.

UNITROL 1020

Applications：

Power Generation Plants

Used in hydroelectric, thermal, diesel, gas turbine, and combined-cycle power stations.

Industrial Power Systems

Supports captive power plants and industrial generator installations.

Marine Applications

Provides voltage regulation for shipboard generators and marine electrical systems.

Oil & Gas Facilities

Ensures reliable generator operation in offshore and onshore energy installations.

Mining Industry

Supports power generation and electrical infrastructure in mining operations.

Utility Power Networks

Used in distributed generation and grid-connected generator applications.

Renewable Energy Projects

Suitable for hydroelectric and hybrid renewable energy generation systems.

FAQ:

Q1: What is ABB UNITROL 1020?

A: ABB UNITROL 1020 is a digital automatic voltage regulator used for excitation control of synchronous generators and motors. It maintains stable voltage output and improves power system performance.

Q2: What is the maximum continuous excitation current?

A: UNITROL 1020 supports up to 20 ADC continuous excitation current.

Q3: Does UNITROL 1020 support generator synchronization?

A: Yes. The regulator includes automatic synchronization and load-sharing functions for parallel generator operation.

Q4: Which communication protocols are supported?

A: Ethernet, Modbus TCP, Modbus RTU, USB, and RS-485 interfaces are supported depending on configuration.

Q5: Is the UNITROL 1020 suitable for retrofit projects?

A: Yes. It is widely used for excitation system upgrades and generator modernization projects.

Q6: What software is used for configuration?

A: ABB CMT1000 software is used for commissioning, diagnostics, parameter configuration, monitoring, and tuning.

Q7: Which industries use UNITROL 1020?

A: Power generation, marine, oil & gas, mining, utilities, manufacturing, and renewable energy industries commonly deploy UNITROL 1020.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.