Name: ABB UNITROL1020 UNS0119A-Z,V1 3BHE030579R0001 | Direct Replacement Excitation Regulator - ABB DCS HEAVY EQUIPMENT
SKU: ABB UNITROL1020 UNS0119A-Z,V1 3BHE030579R0001
Price: 9451.00 USD
Availability: InStock

Description

Meta Description

ABB UNITROL1020 UNS0119A-Z,V1 (3BHE030579R0001) is a compact digital automatic voltage regulator (AVR) from UNITROL 1000 series. It delivers precision excitation control for synchronous generators. All units complete full bench testing, suitable for power plant generator maintenance and overhaul replacement.

Product Core Brief

Model: UNITROL1020, Type Code: UNS0119A-Z,V1; Order Code: 3BHE030579R0001
Brand: ABB
Series: UNITROL 1000
Core Function: Regulate generator terminal voltage and control excitation current for synchronous machines
Type: Digital Automatic Voltage Regulator (AVR / Excitation Controller)
Key Specs: Max continuous excitation current 20 A DC; Built-in Ethernet & RS485; Supports parallel operation; Onboard LCD operator panel
Condition: ⚠️ Original production discontinued; limited new surplus and fully tested used inventory available

Product Introduction

Unstable generator voltage under varying loads directly threatens grid safety, and UNITROL1020 serves as the compact excitation control core to resolve this challenge. It integrates measurement, control logic and IGBT power output within one single unit.

Compared with earlier UNITROL 1000-7 series controllers, this model adopts separated control and communication processors, bringing faster response and richer data logging functions. It is widely deployed on small-to-medium synchronous generators for hydro, diesel, gas and co-generation power plants.

Key Technical Specifications

Parameter	Details
Full Identifier	UNITROL1020 UNS0119A-Z,V1 / 3BHE030579R0001
Official Type	Digital AVR Excitation Controller
Continuous Excitation Output	20 A DC
Input Measurement	1-phase / 3-phase voltage up to 250 V AC
Communication Ports	Ethernet, RS485; supports Modbus TCP / RTU
Configuration Tool	CMT1000 PC software
Operation Ambient	-25 °C ~ +70 °C, non-condensing
Mounting	Standard cabinet DIN mounting
Primary Application	Synchronous generators, synchronous motors

ABB UNITROL1020 UNS0119A-Z,V1 3BHE030579R0001

QC Testing Standard (Transparent Inspection Flow)

Incoming Receiving Check

Verify serial number consistency; inspect enclosure, LCD screen and terminal blocks; check PCB for discoloration, burn traces or repair marks.
Live Bench Functional Test

Install unit on dedicated generator excitation simulation rack; power on to verify LCD display and LED status; execute voltage regulation test, communication handshake and I/O signal simulation. Test photos or video can be provided on request.
Electrical Safety Test

500 V DC insulation resistance test and protective ground continuity inspection.
Firmware & Parameter Recording

Read and archive firmware revision; back up existing parameter set before packaging.
Final Packing & QC Label

Seal with anti-static bag, wrapped with bubble cushion. Attach QC Passed sticker marked with test date.

Field Pitfall Guide for Replacement

❗ Firmware version mismatch causes parameter incompatibility.

We encountered a site case where replacement unit with newer firmware could not import the original parameter file, leading to two days of re-tuning. Always record firmware version of your original UNITROL1020 before ordering.

❗ Save a full parameter backup before powering down the old controller.

Factory default settings cannot match site generator characteristics. Without backup, engineers need to redo all PID, limiter and protection settings manually.

❗ Confirm hardware variant suffix.

Different 3BHE030579Rxxxx variants have optional PSS modules. UNS0119A-Z,V1 cannot directly replace versions with built-in power system stabilizer without modification.

❗ Strict ESD protection required during handling.

Onboard measurement and DSP circuits are sensitive to electrostatic discharge. Wear anti-static wristband when wiring or removing the unit.

ABB UNITROL1020 UNS0119A-Z,V1 3BHE030579R0001

Quick Conclusion

Critical spare part for maintenance of existing UNITROL1020 excitation systems
Suitable for hydro, diesel, gas turbine and industrial co-generation generator sets
Not recommended for new power project design (product discontinued)
Confirm full part suffix, firmware version and optional PSS function before purchase

FAQ

Q1: Can UNITROL1020 UNS0119A-Z,V1 replace UNITROL1010 directly?

A: Physical outline is similar, but maximum excitation output and internal control logic differ. Complete parameter re-tuning is required; direct plug-and-play is not supported.

Q2: What warranty coverage is available?

A: All fully tested controllers carry standard 12-month warranty, effective after successful on-site commissioning acceptance.

Q3: Can you provide test records before shipment?

A: Yes. We can share power-on screenshots, communication test results and physical inspection photos for verification.