ABB 3BHE035301R1002 (UNITROL 1010 / UNS0121A‑Z V1)

Model: 3BHE035301R1002 (Product Model: UNITROL 1010; Part Number: UNS0121A‑Z V1)

Brand / Origin: ABB / Sweden (Made in Switzerland)

Type: Compact Digital Excitation Controller (AVR), suitable for synchronous generators/motors ≤10MVA.

## 1. Electrical Parameters

Input Voltage: 63～250V AC (Single-phase)

Frequency: 50/60Hz ±5%

Excitation Output: Max. 10A DC (Continuous), IGBT Power Stage

Control Accuracy: Steady-state voltage accuracy ±0.5%, dynamic response ≤10ms

Control Cycle: 1ms (32-bit RISC Processor)

Power Consumption: ≤50W

## 2. I/O Interfaces

Analog Input: 3 Channels (Generator Voltage, Current, Excitation Current)

Analog Output: 2 Channels (Excitation Current, Generator Voltage)

Digital Input: 8 Programmable Channels (24V DC)

Digital Output: 8 Programmable Channels (Relay, 250V AC/5A)

Communication: Ethernet, RS‑485, IEC 61850; Supports Modbus TCP/RTU, Profibus‑DP

## 3. Environmental & Mechanical Specifications

Operating Temperature: ‑40℃ ～ +70℃ (Wide Temperature Range)

Storage Temperature: ‑50℃ ～ +85℃

Humidity: 5%～95% RH (Non-condensing)

Dimensions: 302 × 170 × 85 mm

Weight: Approx. 2.8 kg

Protection Grade: IP20 (Dust-proof and finger-contact resistant)

Certifications: CE, UL, DNV (Marine Classification Society)

## 4. Core Functions

Excitation Control Modes: AVR (Automatic Voltage Regulation), Manual (Excitation Current), Var (Constant Reactive Power), PF (Constant Power Factor), Open Loop.

Protection Functions: Overexcitation / Underexcitation Limitation, V/Hz Limitation, Short-circuit Forced Excitation, Rotating Diode Monitoring, Over-temperature Protection.

System Features: Dual-channel Redundancy, Automatic Synchronization, Reactive Power Load Sharing, Grid-connected / Island Operation Support.

## 5. Typical Applications

Small and Medium-sized Thermal / Hydro / Diesel Generators (≤10MVA)

Industrial Drive Motors, Cogeneration, Energy Storage Power Stations

Marine Vessels, Offshore Platforms, Data Center Backup Power Supplies