ABB UNITROL 1000 3BHE014557R0003 AVR
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ABB UNITROL 1000 Voltage Regulator (MPN: 3BHE014557R0003)
The ABB UNITROL 1000 (Part Number: 3BHE014557R0003) is a microprocessor-based Automatic Voltage Regulator (AVR) and digital excitation control module engineered for land-based power plants and marine synchronous machinery. Serving as the core electronic processing and control assembly within ABB’s modular UNITROL 1000 family (compatible across UNITROL 1005, 1010, and 1020 platforms), this module provides fast-response excitation power, generator terminal voltage regulation, and grid/bus stability under transient conditions.
The 3BHE014557R0003 maintains voltage regulation accuracy within $\pm0.2\%$ across load profiles. It manages brushless or slip-ring excitation setups, supports single/dual-channel configurations with smooth bump-less transfer, and incorporates critical protection limits, including Under-Excitation (UEL), Over-Excitation (flux limiter), stator current limiting, and rotating diode fault monitoring (RDM).
Model Details
- Manufacturer: ABB Switzerland Ltd. / ABB Industry Systems
- Product Line: UNITROL® 1000 Series Digital Excitation Systems
- Part Number (MPN): 3BHE014557R0003
- Hardware Designation: UNITROL 1000 Controller / Power Regulation Assembly
- Compatible Hardware Series: UNITROL 1005, UNITROL 1010, UNITROL 1020, UNITROL 1000-PM40
- Software Functionality Profiles: BASIC, FULL, and ECO tiers (configurable via ABB CMT1000 software tool)
Technical Specifications
| Parameter | Specification Rating / Value |
|---|---|
| Excitation Power Electronic Input (AC) | 3-Phase or 1-Phase: 0 to 250 VAC nominal (max continuous 300 VAC, sinusoidal) |
| Excitation Power Electronic Input (DC) | 0 to 300 VDC (peak non-sinusoidal withstand up to 420 Vpk) |
| Auxiliary Control Supply Input | 16 to 250 VAC (1-phase), 9 to 250 VAC (3-phase), or 18 to 300 VDC |
| Excitation Output Current (Continuous) | 10 A continuous (UNITROL 1010) / 20 A continuous @ 40°C (UNITROL 1020); expandable up to 40 A with PM40 booster |
| Overload / Ceiling Current Rating | 200% nominal ceiling capacity (up to 40 A for 10 seconds on UNITROL 1020) |
| Voltage Regulation Accuracy | ±0.2% across rated operating temperature range |
| AVR Dynamic Response Time | < 20 ms (3-phase measurement sensing) |
| Generator Sensing Voltage Inputs | 1, 2, or 3-phase true RMS sensing up to 500 VAC (10 to 150 Hz) |
| Current Sensing Inputs (CT) | 1-phase stator current CT secondary, 1 A or 5 A nominal (< 100 mA resolution) |
| Analog Inputs / Outputs | 3 configurable analog inputs (±10 V / 4–20 mA, Zin < 240 kΩ); 2 analog outputs (±10 V, Zout 100 Ω) |
| Digital Inputs / Outputs | 4 dedicated digital inputs; 8 configurable digital I/Os (transistor, 24 V, 150 mA max); 24 V auxiliary DO relay feed |
| Fieldbus / Communication Ports | 1x USB 2.0 (CMT1000 PC tool); 1x RS-485 (Modbus RTU / VDC reactive load sharing); 1x CAN (dual channel link); 1x Ethernet (Modbus TCP) |
| Terminal Block Interface | Vibration-proof cage clamp / tension-spring terminals for wiring 0.2 to 4.0 mm² (AWG 24–10) |
| Operating / Storage Temperature | Operating: -40°C to +70°C (heatsink max 90°C); Storage: -40°C to +85°C |
| Protection Degree & Mounting | IP20 chassis; DIN rail 35 mm or rear backplate direct panel mounting |
Compatibility
- Alternator Makes: Leroy Somer (LSA series), Stamford / Cummins Generator Technologies (P7, P80, LVSI, HVSI series), Mecc Alte (ECO/PRO series), Marathon Electric (MagnaMax / MagnaPower), AVK, and ABB AMG/AMH generators.
- Control Platforms: Integrates into ABB 800xA, ABB AC500 PLC, Siemens S7-1500, Woodward EasyGen / 2000 / 3000 series, and DEIF AGC switchboard power management systems via Modbus RTU (RS-485) or Modbus TCP (Ethernet).
- Booster Units: Directly drives external power module ABB UNITROL 1000-PM40 when continuous current requirements exceed 20 A up to 40 A.
Frequently Asked Questions
Can the 3BHE014557R0003 directly replace an older obsolete UNITROL 1000 module?
Yes. The 3BHE014557R0003 is backward-compatible with legacy UNITROL 1000 series systems. However, before powering up, parameter settings must be matched using the CMT1000 software tool to verify generator nominal voltage, rated current, exciter ceiling current, and stability PID parameters against your alternator’s test sheet.
Does this regulator support dual-channel hot-standby setups?
Yes. When paired with a second UNITROL 1000 unit via the dedicated high-speed CAN interface, the controller operates in a fully redundant dual-channel configuration. Channel 1 tracks Channel 2 continuously; if a microprocessor fault, power stage failure, or PT sensing signal loss occurs, control transfers to the backup unit bump-lessly.
What is the difference between UNITROL 1010 and UNITROL 1020 configurations with this board?
The part number 3BHE014557R0003 serves as the universal core control board. In a UNITROL 1010 setup, the power stage supplies up to 10 A continuous excitation current, whereas a UNITROL 1020 setup supplies up to 20 A continuous current at 40°C (expandable to 40 A via the UNITROL 1000-PM40 module).
What is Rotating Diode Monitoring (RDM) and why is it essential?
In brushless synchronous generators, rotating rectifiers spin on the rotor shaft and cannot be visually inspected while running. The integrated RDM feature analyzes the ripple frequency and harmonic distortion in the exciter field current. It alerts the marine engineer immediately when a diode experiences an open-circuit or short-circuit condition, preventing catastrophic rotor or exciter stator burnout.
What tool is required to commission and program this AVR?
Configuration is carried out via a standard PC connected via USB using the ABB CMT1000 commissioning tool software. CMT1000 allows engineers to upload/download configuration files, monitor live parameters, tune the PID loop using step-response tests, and download event history and oscilloscope waveforms.
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