Description
Product Core Brief
- Model: UNITROL 1010
- Material Number: 3BHE035301R0001
- Firmware Identifier: UNS0121A-Z.V1
- Brand: ABB
- Series: ABB UNITROL 1000 Series — Digital AVR Family
- Core Function: Compact digital automatic voltage regulator with built-in IGBT power stage for small/medium synchronous generators and industrial machines, providing AVR control, excitation regulation, and field communication.
- Product Type: Digital AVR / Excitation Voltage Regulator
- Key Specs: 10A DC continuous excitation output, IGBT power stage, Ethernet Modbus TCP + RS-485 Modbus RTU, USB service port, configurable I/O, CMT1000 commissioning tool.
- Condition: New Original / New Surplus — confirm before shipment
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | ABB |
| Model | UNITROL 1010 |
| Material Number | 3BHE035301R0001 |
| Firmware Identifier | UNS0121A-Z.V1 |
| Product Type | Digital Automatic Voltage Regulator |
| Associated Systems | ABB UNITROL 1000 series excitation platforms |
| Application Range | Small/medium synchronous generators and industrial machines (up to ~50 MW system class) |
| Excitation Output | 10A DC continuous (built-in IGBT power stage) |
| Voltage Regulation | AVR, Manual (FCR), PF, VAR modes; steady-state accuracy typically ±0.25% to ±0.5% |
| Communication | Ethernet Modbus TCP, RS-485 Modbus RTU, USB service port |
| Digital I/O | Configurable 24 VDC digital inputs/outputs |
| Analog I/O | Configurable analog inputs/outputs (4–20 mA / ±10 V depending on configuration) |
| Auxiliary Supply | Wide-range AC/DC supply (confirm exact range from nameplate; commonly 100–240 V AC or 24 V DC variants) |
| Commissioning Tool | CMT1000 |
| Mounting | Panel-mount inside control cabinet |
| Operating Temperature | -25°C to +60°C (some variants up to +70°C) |
| Applications | Diesel/gas gensets, small hydro, marine generators, industrial synchronous machines |
| Documentation | ABB UNITROL 1010 manual required for final engineering verification |
Product Introduction (No Fluff)
The ABB UNITROL 1010 (material number 3BHE035301R0001, firmware UNS0121A-Z.V1) is a digital automatic voltage regulator from the ABB UNITROL 1000 series. It is designed for small and medium synchronous generators and industrial machines, providing automatic voltage regulation, excitation control, and comprehensive protection functions.
The UNITROL 1010 features a built-in IGBT power stage capable of 10A DC continuous excitation output, eliminating the need for an external power bridge in many applications. It supports multiple regulation modes including AVR, manual field current control, power factor, and reactive power control. Communication options include Ethernet Modbus TCP and RS-485 Modbus RTU for SCADA/DCS integration, plus a USB service port for local commissioning via the CMT1000 tool.
Because UNITROL 1010 is available in multiple material number variants and firmware revisions, always confirm the exact model, material number, and firmware identifier against the existing nameplate before ordering.
QA & Testing SOP (Dynamic & Transparent)
- Nameplate Verification
Confirm the front label reads UNITROL 1010, the material number matches 3BHE035301R0001, and the firmware identifier shows UNS0121A-Z.V1. Check for mismatched codes or altered labels. - ESD-Safe Handling
Store and ship in anti-static packaging. The AVR contains sensitive microprocessor, power electronics, and communication circuits. - Connector & Terminal Inspection
Inspect power terminals, measurement inputs, Ethernet/RS-485 ports, USB port, and I/O terminals for damage, oxidation, or loose connections. - Controlled Power-On Test (If Test Setup Available)
Apply rated auxiliary supply and verify initialization, LED indicators, and display response. Do not apply full field output or generator PT voltage without proper test equipment. - Communication & Parameter Check
If the host system is available, verify Modbus TCP/RTU communication, parameter access via CMT1000, and correct recognition by the plant control system.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Confirm the exact material number and firmware. UNITROL 1010 has multiple variants. Different material numbers and firmware revisions may have different I/O maps, communication settings, or feature sets.
❗ Do not energize without verified wiring. Incorrect PT wiring, field output, or auxiliary supply polarity can damage the AVR or cause unstable voltage regulation.
❗ Follow generator isolation procedures. Excitation and measurement circuits may carry hazardous voltage. Apply lockout/tagout before working on the cabinet.
❗ Verify PT ratios and measurement configuration. Incorrect PT ratio or phase sequence can lead to overvoltage, undervoltage, or regulator instability.
❗ Back up parameters before replacement. Export existing AVR parameters via CMT1000 where possible. After replacement, verify voltage setpoint, PID gains, limiter settings, I/O configuration, and communication addresses.
Replacement Steps:
- Pre-install: Back up AVR parameters. Confirm model, material number, firmware, wiring diagram, and PT ratio.
- Removal: Stop the generator/excitation system. Isolate auxiliary supply, field output, and measurement circuits. Label all cables before disconnection.
- Install: Mount the new AVR unit. Reconnect PT, field, communication, and auxiliary wiring according to the cabinet drawing.
- Commissioning: Restore power under controlled conditions. Verify measurement values, communication, parameter loading, and AVR operation before returning to automatic mode.
Technical FAQ
1. Is UNITROL 1010 3BHE035301R0001 compatible with my generator?
It is designed for small and medium synchronous generators and industrial machines, with a 10A DC continuous excitation output. Final compatibility depends on generator rating, excitation type, PT configuration, and cabinet design. Confirm against the existing nameplate and ABB documentation.
2. What is the material number for this unit?
The material number is 3BHE035301R0001. The firmware identifier is UNS0121A-Z.V1. Always verify both on the front label.
3. What communication does it support?
It supports Ethernet Modbus TCP, RS-485 Modbus RTU, and a USB service port for CMT1000 commissioning.
4. What is the excitation output capacity?
10A DC continuous output via the built-in IGBT power stage.
5. Do you offer warranty on this unit?
Warranty terms depend on condition. New original stock typically carries stronger coverage than surplus inventory. Confirm warranty length and DOA terms before purchase.
6. Can I get flexible pricing for MRO or project orders?
Yes. Pricing depends on quantity, condition, revision, and lead time. For stocking orders or project procurement, request a quote with your required quantity and delivery date.
