Product Introduction

Model Interpretation

• UNS: Series code for ABB UNITROL series excitation control modules.

• 0118: Product specification and hardware version identifier.

• a: Revision level of the printed circuit board.

• Z: Variant code for specific configuration or application.

• 3BHE016011R0002: Unique ABB part number for ordering, traceability, and system configuration.

Technical Parameters

• Power supply: 24VDC (±10% tolerance), 110/220VAC optional.

• Continuous output current: Up to 20ADC for excitation control.

• Voltage regulation accuracy: ±0.5% of rated generator voltage.

• Control algorithm: PID‑based regulation with rotating diode monitoring (RDM).

• Operating temperature: −20°C to +60°C.

• Storage temperature: −40°C to +85°C.

• Protection degree: IP20.

• Dimensions (W×H×D): 120×280×35mm.

• Weight: Approximately 1.2kg.

• Certification: CE, UL, CSA.

• MTBF: >100,000 hours.

Interface and Communication Configuration

• Power interface: 24VDC input terminal with reverse polarity and overvoltage protection.

• Signal input: Generator voltage/current sensing inputs, 4–20mA analog signals, 16‑channel digital inputs.

• Signal output: Excitation drive outputs, 16‑channel digital outputs, alarm relay contacts.

• Communication interface: RS‑485 (Modbus RTU), Ethernet optional for remote monitoring and parameter setting.

• Auxiliary interfaces: LED indicators for power, run, and fault status; test points for on‑site debugging.

• Connection type: Industrial‑grade plug‑in terminals for secure and fast wiring.

Core Functions

• Precision voltage regulation: Stabilizes synchronous generator terminal voltage and suppresses load‑induced fluctuations.

• Excitation current control: Adjusts excitation current via IGBT power conversion to ensure stable generator operation.

• System protection: Integrates overcurrent, overvoltage, undervoltage, and rotating diode failure protection.

• Real‑time monitoring: Tracks operating parameters and fault status via local LEDs and remote communication.

• Logic processing: Executes control sequences, interlocks, and alarm management for power plant systems.

Application Scenarios

• Power generation plants: Diesel, gas, steam, and hydro turbine‑driven synchronous generators.

• Industrial power systems: Backup power supplies and distributed generation units in factories and facilities.

• Marine propulsion: Shipboard generators and power management systems.

• ABB system integration: Compatible with Symphony Plus DCS and AC500 PLC platforms for automation solutions.

Operation and Maintenance Instructions

• Install in a well‑ventilated, dust‑free cabinet; avoid direct sunlight, moisture, and corrosive gases.

• Verify 24VDC power supply voltage and polarity before power‑on; check all signal and power connections for tightness.

• Observe LED indicators during operation: power light on, run light flashing, fault light off for normal status.

• Keep the module clean; periodically remove dust with dry compressed air to prevent overheating and short circuits.

• Do not disassemble or modify components without authorization; replace the module immediately if abnormal noise, overheating, or persistent faults occur.

• Disconnect all power sources before maintenance or replacement to ensure safety.