UNITROL1020 3BHE030579R0003 ABB digital excitation controller new

• Brand
  ABB
• Model
  UNITROL1020
• Product Name
  Digital Automatic Voltage Regulator / Excitation Controller for Synchronous Generators
• Place of Origin
  Switzerland
• Customs HS Code
  85371011
• Part number
  3BHE030579R0003
• Dimensions
  302 mm × 170 mm × 111.4 mm
• Weight
  3.8 kg
• Operating Temperature
  -25°C to +70°C
• Storage Temperature
  -60°C to +70°C
• Warranty
  1 year
• Product Status
  original

ABB UNITROL1020 3BHE030579R0003 Technical Specifications

Auxiliary Supply Input

1-phase AC: 16-250 V AC; 3-phase AC: 9-250 V AC; DC: 18-300 V DC

Max peak voltage: 420 V peak

Frequency range: 40-600 Hz

Maximum power consumption: 40 W

Excitation Main Power Input

AC range: 0-250 V AC, maximum 300 V AC

DC range: 0-300 V DC, maximum 420 V DC

Max peak voltage: 420 V peak

Frequency range: 40-600 Hz

PT Voltage Measuring Input (Generator Terminal Voltage)

1-phase / 2-phase / 3-phase AC measurement input

Max measuring voltage: 500 V AC; typical PT secondary 100 V / 110 V AC

Frequency range: 10-150 Hz

CT Current Measuring Input (Generator Stator Current)

AC current input from CT secondary, standard 1 A or 5 A

Digital Inputs

Nominal operating voltage: 24 V DC

Logic low threshold: 5 V; logic high threshold: 13 V

Input impedance: < 2 kΩ

Digital Outputs

Nominal rating: 24 V DC

Maximum continuous current: 150 mA per channel

Relay contact outputs available

Configurable Analog Inputs

Signal ranges: -2.5~+2.5 V, -5~+5 V, 0~5 V, 0~10 V, 0~20 mA, 4-20 mA

Input impedance: < 240 kΩ

Configurable Analog Outputs

Signal ranges: -10~+10 V, 0-20 mA, 4-20 mA

Output impedance: 100 Ω

Field Excitation Power Output

Continuous DC field current: 20 A DC @55 °C

Continuous DC field current: 10 A DC @70 °C

10-second short-time overload current: 38 A DC

Output DC voltage: 0-300 V DC continuous

Performance Parameters

Voltage regulation accuracy: ±0.2 % (at 25 °C)

AVR step response time: <20 ms (3-phase measurement), <50 ms (1-phase measurement)

PWM duty-cycle range: 0.5-99 %

Communication Interfaces

USB 2.0 for CMT1000 commissioning tool

Ethernet 10/100 Mbit/s, Modbus-TCP

RS-485 optional, Modbus-RTU

Built-in Functions

Auto voltage regulation, manual field current regulation, VAR/Power-factor control, over-excitation / under-excitation / V/Hz limiters, rotating diode monitoring, event logger, data recorder, optional PSS, voltage droop compensation, soft start.

Advantages of ABB UNITROL1020 (3BHE030579R0003)

Adopts high-performance digital DSP control platform, delivering rapid dynamic response and precise voltage regulation of ±0.2 %, maintaining stable generator terminal voltage amid load variations and grid disturbances.

Delivers strong excitation output capability with 20 A DC continuous field current, ideal for generators requiring higher exciter power.

Offers diverse integrated regulation modes including automatic AVR voltage control, manual field current regulation, VAR and power-factor control. Built-in protective limiters cover over-excitation, under-excitation and V/Hz protection.

Provides IEEE-compliant optional Power System Stabilizer (PSS) to damp low-frequency oscillations and strengthen grid-connection stability, perfectly fitting weak-grid and island-mode operation scenarios.

Features universal wide-range power input compatible with multi-phase AC and broad-range DC auxiliary supplies, offering great flexibility for various on-site power source conditions.

Fully configurable digital and analog I/O channels enable seamless signal adaptation for different generators and plant control systems.

Comes with onboard local HMI panel, supporting on-site monitoring, parameter review and basic operations without connecting a laptop.

Versatile communication ports consist of USB interface for CMT1000 commissioning, Ethernet Modbus-TCP, and optional RS-485 Modbus-RTU, simplifying remote supervision and DCS system integration.

Comprehensive diagnostic toolkit contains rotating diode supervision, millisecond-accurate event log and data recorder, facilitating quick fault identification and post-incident analysis.

User-friendly CMT1000 commissioning software includes an embedded tuning assistant, shortening on-site debugging cycles and lowering commissioning efforts.

Supports both single-channel and dual-channel redundant setups to boost overall system operational reliability.

Robust industrial hardware with high-level EMC immunity meets CE, cUL, DNV and grid-related standards, ensuring dependable performance for terrestrial power stations, marine installations, hydro-turbine, gas-turbine and diesel-generator units.

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