Description

ABB 3BHE035301R0004 UNITROL1010 | Synchronous Machine Excitation Control Unit Spare Part

Product Core Brief

Model: UNITROL1010, Part No: 3BHE035301R0004
Brand: ABB
Series: UNITROL®1000 Series Digital Excitation System
Core Function: Digital Automatic Voltage Regulator(AVR), control excitation current for synchronous generators / synchronous motors, stabilize terminal voltage, reactive power & power factor
Product Type: Compact Indirect Excitation Controller
Key Specs: Continuous excitation output 10A DC, 10s overload 25A DC; IGBT power stage; multi-regulation modes; Ethernet/RS485/USB/CAN communication
Condition: New Original surplus stock

⚠️ Different suffix codes (0001/0003/0004) correspond to different firmware/software packages; cannot directly cross-replace without confirming feature license

Product Introduction

ABB UNITROL1010 belongs to UNITROL1000 platform compact digital excitation regulator, widely used for ≤80MVA indirect excited synchronous machines, including small hydropower units, diesel/gas generator sets, marine auxiliary generators, industrial synchronous motors and distributed power stations.

Adopts high-speed dual DSP architecture and IGBT power topology. Supports bumpless switching between multiple control modes, built-in complete excitation limiters and fault protection functions. It realizes parallel load sharing, rotating diode monitoring for brushless exciters, and built-in synchronizer function. Certified by DNV, UL and CE, suitable for vibration-prone marine and on-site machine direct mounting environments. Commissioning, parameter tuning and fault recording rely on official CMT1000 PC software.

Compare with UNITROL1020: UNITROL1010 max continuous output 10A; UNITROL1020 reaches 20A continuous excitation current. Same mechanical dimension, different power rating.

Key Technical Specifications

Parameter Item	Technical Data
Full Part Number	UNITROL1010 / 3BHE035301R0004
Excitation Output	Continuous:10A DC (55°C); 10s overload:25A DC
Power Stage	IGBT based indirect excitation
Auxiliary Control Power	1Ph AC 16–250VAC; 3Ph AC 9–250VAC; DC 18–300VDC
Machine Voltage Measurement	1/2/3-phase up to 500V AC
Frequency Range	10–150Hz
Regulation Modes	AVR(Constant Voltage) / FCR(Field Current) / VAR / Power Factor
Core Built-in Functions	V/Hz limiter, Over/Under Excitation Limiter, PQ Limiter, Rotating Diode Monitoring, Parallel Load Sharing, Built-in Synchronizer
Communication Ports	Ethernet(Modbus TCP), RS485(Modbus RTU), USB service port, CAN bus (Dual-channel interconnection)
Environmental Range	Operating: -40°C ~ +70°C; Storage: -45 ~ +85°C
Certification	CE, cUL UL508c, DNV Class B Marine Approval
Installation	DIN rail / direct machine mounting; IP20 cabinet installation

ABB 3BHE035301R0004 UNITROL1010

Installation & Configuration Guide

Stage1: Pre-Installation Preparation (15 mins)

⚠️ Safety Preconditions

Implement Lockout-Tagout procedure. Disconnect generator main switch, cut excitation power and auxiliary control supply. Wait minimum 5 minutes for internal capacitors full discharge to avoid electric shock risk. Confirm generator is in safe maintenance state.

Tool Preparation

ESD anti-static wrist strap, PH2 screwdriver, Fluke multimeter, shielded communication cables, mobile phone for wiring photo recording, laptop with CMT1000 software and dedicated USB programming cable.

Preparation Checklist

Confirm part number suffix 3BHE035301R0004 matches original unit software license;
Export parameter backup file from old controller;
Separate power cables and signal cables during wiring to reduce EMI interference.

Stage2: Old UNITROL1010 Removal (12 mins)

Step1: Label all terminals: Excitation output, machine voltage VT, CT current, auxiliary power, communication wiring, digital/analog I/O.

Step2: Disconnect signal terminals first, then power & excitation high-power terminals.

Step3: Release DIN rail fixing latch, slide controller outward horizontally; avoid twisting PCB.

Step4: Inspect terminal plug pins for oxidation, burn marks and loose pins. Blow dust by dry compressed air.

⚠️ Key Reminder: Record CAN bus wiring sequence if running dual redundant channel configuration; reversed CAN wiring leads to main/standby switching failure.

Stage3: New UNITROL1010 Installation (18 mins)

Step1: Wear ESD protection before unpacking; static will damage internal DSP and IGBT drivers.

Step2: Verify full part number 3BHE035301R0004, do not mix with other suffix variants.

Step3: Mount controller firmly on DIN rail, lock the fixing buckle.

Step4: Reconnect terminals strictly following photographed wiring layout; control cable torque 0.4~0.6 N·m.

Step5: Route Ethernet / RS485 shield cable, single-point grounding of shielding layer.

Self-Check List

All terminals fully inserted ✅

Power cable & signal cable separated ✅

Cooling vents unobstructed ✅

PE protective earth reliably connected ✅

Stage4: Power-On & Commissioning (30 mins)

Pre-power inspection: Measure insulation, confirm no short-circuit between excitation output terminals and ground.

Step1: Restore auxiliary control power; observe front panel status LED, wait for controller initialization.

Step2: Connect laptop via dedicated USB cable, open CMT1000, import saved project parameters.

Step3: Verify measurement signals (VT voltage, CT current) display correctly on software interface.

Step4: Perform static test; carry out manual excitation test without generator rotation first.

Step5: On generator rotation, execute no-load voltage adjustment test, check AVR regulation performance.

Step6: Test limiters, protection functions and alarm logic; test parallel load sharing if multiple gensets.

Step7: Continuous running test for minimum 1 hour; record operating data, save final parameter file for archive.

Troubleshooting Tip: Unstable voltage regulation usually comes from poor VT signal wiring, wrong CT polarity or unoptimized PID gain parameters; adjust parameters via CMT1000.

Quality Inspection Process

Warehouse Incoming Verification

Check label full PN:3BHE035301R0004. Visual inspection for housing scratch, damaged terminals. Verify LED indicator status.
Bench Functional Testing

Power on test, verify all communication interfaces, analog/digital I/O channel test. Load simulate excitation output. Complete communication connection test with CMT1000.
Firmware & License Check

Confirm built-in software function package consistent with part suffix code.
Data Archiving

Record serial number, hardware revision, firmware version for traceability.
Final QC & Packing

Qualified unit packed with anti-static bag and foam. Attach QC Pass sticker. Test screenshots can be provided on request.

Field Replacement Pitfall Guide

❗ Confusion of different part suffix variants

3BHE035301R0001 / 0003 / 0004 carry different software function licenses. Direct replacement may lose PSS, synchronizer or dual-channel functions. Always match complete part number.

❗ Ignoring dedicated USB programming cable

Standard USB cable cannot establish communication; must use ABB original red dedicated USB cable supplied with unit.

❗ Improper excitation wiring polarity

Reverse excitation output polarity leads to no excitation, or permanent damage of IGBT power unit.

❗ No parameter backup before replacement

Each unit has site-tuned PID, limiter and PSS parameters. Without backup, re-commissioning costs huge time.

❗ Neglect ESD protection

PCB internal control chips are sensitive to static electricity; random channel faults may appear after installation without anti-static operation.

❗ Inadequate ventilation

Controller heat sink must maintain free airflow. Cabinet over-temperature triggers overheat protection and trip during heavy load.

Frequently Asked Questions (FAQ)

What is the difference between UNITROL1010 and UNITROL1020?

UNITROL1010 continuous excitation output 10A DC; UNITROL1020 is 20A DC. Same mechanical size and software platform. Select according to exciter rated field current.
Can UNITROL1010 realize dual redundant master/standby configuration?

Yes. Two UNITROL1010 connected via CAN bus for bumpless transfer. Must use same part number and consistent firmware version.
Which software is used for parameter setting?

CMT1000 commissioning tool software, exclusive for UNITROL1000 series.
Can this unit be used for brushless synchronous generators?

Fully applicable. Supports rotating diode fault monitoring function for brushless exciters.
What warranty is provided for stocked UNITROL1010 3BHE035301R0004?

All units enjoy 12-month warranty after shipment. Complete bench testing finished before delivery. Damage caused by wrong wiring, overvoltage surge and ESD abuse is excluded from warranty coverage.
Can I upgrade software function license on site?

Function package is bound to part suffix. On-site license upgrade requires official ABB service support.