Description
Product Core Brief
- Model: UNITROL 1010 (3BHE035301R0004)
- Brand: ABB
- Series: UNITROL 1000
- Core Function: Automatic voltage regulator and small indirect excitation system for small and medium synchronous generators; provides AVR control, excitation regulation, protection, and communication.
- Product Type: AVR / Excitation Controller / Voltage Regulator
- Key Specs: Up to 10 A DC continuous excitation output | Built-in IGBT power stage | Digital PID regulation | Ethernet, USB, RS485 communication | Rotating diode monitoring | Parallel load sharing
- Condition: New Original / New Surplus
Key Technical Specifications
- Part Number: UNITROL 1010 / 3BHE035301R0004
- Manufacturer: ABB
- Product Category: Automatic voltage regulator / excitation controller
- Application: Diesel/gas/hydro generators, marine auxiliary power, industrial synchronous machines, small power plants
- Core Role: Maintains generator terminal voltage, regulates excitation current, supports parallel operation, and provides protection/monitoring
- Excitation Output: Up to 10 A DC continuous operation; short-time overload capability depending on configuration
- Control Technology: Microprocessor-based digital PID voltage regulation
- Communication: USB, RS485, Ethernet; Modbus RTU/TCP support depending on configuration
- Features: Dual-channel support, reactive power load sharing, rotating diode monitoring, automatic synchronizing, event and data recording
- Commissioning Tool: CMT1000 for parameter setting, firmware update, and fault analysis
- Standards: Designed to meet DNV and UL requirements
- Lifecycle Status: Availability depends on surplus stock; official ABB lifecycle should be confirmed by order code
- Condition: New / New Surplus
- Warranty: Up to 12 months (supplier-dependent)
Product Introduction
The ABB UNITROL 1010 3BHE035301R0004 is an automatic voltage regulator from the UNITROL 1000 series. It is designed as a compact indirect excitation system for small and medium synchronous generators and industrial machines. The controller uses microprocessor technology and built-in IGBT semiconductors to deliver stable voltage regulation, fast dynamic response, and reliable excitation control.
For maintenance teams, system integrators, and MRO procurement, the UNITROL 1010 is typically sourced as a verified replacement when a failed AVR affects generator voltage stability, excitation control, parallel operation, or protection functions. Keeping a tested spare helps reduce downtime during generator maintenance or unexpected AVR faults.
QA & Testing SOP
AVR controllers must be verified before installation, because incorrect voltage regulation or excitation parameters can affect generator stability and plant safety.
- Visual & authenticity inspection. Check the enclosure, terminals, connectors, and PCB for corrosion, burnt components, cracked solder joints, or rework marks. Verify the ABB label and 3BHE035301R0004.
- Power-up test. Apply rated auxiliary supply and confirm stable startup with no abnormal heating or fault indication.
- Communication check. Verify USB, Ethernet, and RS485 interfaces initialize correctly where testable.
- Parameter verification. Confirm firmware version, configuration, and stored parameters match the installed generator system. Use CMT1000 where applicable.
- Protection and diagnostics check. Verify LED indicators, fault codes, event logs, and protection functions respond correctly under bench or supervised conditions.
- Excitation output check. Do not perform live excitation tests without site approval. Output verification should follow generator commissioning procedures.
- Anti-static and mechanical protection. Use ESD-safe handling for internal electronics and protect terminals and connectors during shipping.
Installation Pitfalls & Guide
❗ Confirm the full order code and hardware version. “UNITROL 1010” alone is not sufficient. The 3BHE order code and UNS hardware version must match the installed unit.
❗ Do not substitute with other UNITROL models. UNITROL 1010, UNITROL 1020, and UNITROL 1000-15 have different output ratings and configurations. They are not directly interchangeable.
❗ Verify generator compatibility. Excitation current limit, voltage measurement inputs, protection settings, and parallel operation parameters must match the generator and exciter.
❗ Commission under supervision. AVR replacement and parameter loading should be performed by qualified personnel following plant safety procedures.
Replacement steps:
- Pre-install: Record existing parameters, wiring labels, communication settings, and alarm history.
- Removal: De-energize the generator excitation circuit and auxiliary supply unless the site procedure allows otherwise.
- Install: Mount the UNITROL 1010 securely and reconnect all terminals per the original wiring.
- Commissioning: Power up, verify communication, load correct parameters, and validate voltage regulation and protection behavior under supervision.
Technical FAQ
Is this an OEM genuine part?
Yes. The UNITROL 1010 3BHE035301R0004 is an ABB-origin automatic voltage regulator. Units are sourced as new original or new surplus with full part number traceability.
What is the difference between R0004 and other order codes?
All belong to the UNITROL 1010 series. Different 3BHE order codes may correspond to different hardware revisions, firmware, or configurations. They should not be treated as automatically interchangeable without verification.
What is the warranty?
Typically 12 months from acceptance, depending on supplier terms. Always confirm warranty conditions before purchase.
Can I use this as a direct replacement?
Only if the full order code, hardware version, firmware, and generator parameters match. AVR units must be verified against the existing excitation system before commissioning.
Is this product still supported by ABB?
Official lifecycle status varies by region and order code. For active service contracts, confirm current support directly with ABB.
Do you offer pricing for bulk or repeat orders?
Pricing is quoted per unit and can be adjusted for volume, repeat procurement, or long-term spare parts agreements. Send the full part number, hardware version, and quantity for a direct quote.
