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ABB UNK4806B-G HIER455232 Unitrol M Rack
Unitrol M rack assembly, excitation system, spare parts, in stock.

ABB UNK4806B-G Unitrol M Rack HIER455232

The ABB UNK4806B-G (HIER455232) is a rack or chassis unit designed for the ABB UNITROL® 6000 excitation system, as implied by its "Unitrol M Rack" designation. Its core function is to serve as the structural and electrical backbone of the excitation system, housing and interconnecting critical components such as the control and power electronics necessary for regulating the voltage and current of large synchronous generators and motors.

  • Item No :

    HIER455232

  • Order(MOQ) :

    1

  • Payment :

    EXW

  • Product Origin :

    Sweden

  • Shipping Port :

    Wuhan, Hubei, China

  • Lead Time :

    3-5days

  • Weight :

    3kg

  • Products Description

    ABB UNK4806B-G Unitrol M Rack HIER455232

    Model Number HIER455232 
    Place of Origin Sweden
    Dimension/Weight 3kg
    Condition New and Original
    Warranty 1 year
    Shipping term DHL Fedex TNT EMS UPS
    Payment TT / Western Union
    Delivery time 3-5 days
    Service 24 Hours Online Service

    Main Features

    Item

    		 Specifications / Features
    Product Type Unitrol M Rack / Chassis
    System Platform ABB UNITROL® 6000 Excitation System 
    Primary Function Houses and interconnects the control modules (e.g., AC 800PEC) and power converters (e.g., D1-D5, UNL14300) within the excitation system .
    Available Versions Designed to support either the UNITROL 6000 Medium (for DC currents up to ~1,800 A) or X-power (for DC currents from 1,800 to 12,000 A) configurations .
    Applications Serves the needs of generators in steam, gas, nuclear, and hydro power plants, as well as large synchronous motors in process industries like steel mills and chemical plants .

    Core Features & Advantages

    • Central Hub for High-Availability Systems: A key characteristic of the UNITROL 6000 system is its modularity and configurability . The rack platform, such as the UNK4806B-G, provides the foundation to build highly available systems, supporting single, dual, and even backup control channels to meet the uptime requirements of critical power generation assets .

    • Scalable Power and Control Architecture: The UNITROL 6000 system is designed to be scalable, and the rack is central to this . The UNK4806B-G likely houses the AC 800PEC high-performance controller platform and provides slots for a range of power converter modules, from the D1-D5 series for lower currents up to the UNL14300 for the highest demands, making it a versatile backbone for any excitation system size .

    Typical Applications

    The UNK4806B-G is an integral part of the UNITROL 6000 system, used in heavy industry and power generation:

    • Power Generation: A critical component in the excitation systems for steam, gas, nuclear, and hydro power plant generators .

    • Industrial Motor Control: Used for the safe and reliable operation of large synchronous motors that drive equipment like compressors and mills in steel, chemical, and pulp and paper plan

    Frequently Asked Questions (FAQ)

    Q1: What is the difference between UNITROL 6000 Medium and X-power?

    A: The key difference is the DC field current range and intended application scale. Medium covers currents up to approximately 1,800 A and is designed for small to medium static excitation systems. X-power handles currents from 1,800 A up to 12,000 A and is a top-class system for large power generation units, including nuclear and large hydro .

    Q2: What are the key control and protection functions of the system?

    A: The system provides comprehensive closed-loop control and protection. Core control functions include voltage regulation (PID) and field current regulation (PI). Protection and monitoring functions, which can be configured on three action levels (alarm, channel changeover, or excitation trip), include overcurrent, Volt/Hertz, loss of field, rotor temperature, and thyristor conduction monitoring .

    Q3: What communication protocols does UNITROL 6000 support?

    A: The system supports multiple communication interfaces including Modbus RTU and TCP, PROFIBUS DP, and optional IEC 61850 for integration with modern power plant and grid control systems .

    Q4: What is the role of the rack, such as the UNK4806B-G, in the system?

    A: The rack provides the structural and electrical backbone for the excitation system. It houses and interconnects the control modules (such as the AC 800PEC controller) and power converter modules (D1-D5 or UNL series). The specific rack type is part of the overall system configuration and supports building single or dual-channel, high-availability systems .

    Q5: What are the typical applications for the UNITROL 6000 system?

    A: The applications are widespread. For generators, it serves steam, gas, nuclear, and hydro power plants. For motors, it is used in process industries such as steel mills, pulp and paper, chemical plants, and refineries .

    Q6: What are the key performance indicators of the control platform?

    A: The system is based on the AC 800PEC high-performance processor. It features fast I/O with a typical cycle time of 400 µs and very fast programmable logic for converter pulse control with a cycle time down to 25 ns .

    Q7: What are the physical characteristics of a UNITROL 6000 rack?

    A: While specific dimensions for every rack are not provided, the system is built on the AC 800PEC platform. The rack supports modular components with backplane power, diagnostic LEDs, and various interface cards, designed to be robust for demanding power plant environments .

    Recommended Models & System Components

    The UNK4806B-G rack is a component within the broader UNITROL 6000 platform. The following are the primary system variants and key components recommended for building a complete excitation control solution :

     

     
     
    Product/Model Type Brief Description
    UNITROL® 6000 Medium Excitation System Fully customizable system for DC currents up to 1,800 A. Suitable for hydro, pumped storage, combined cycle, and critical steam power plants. Supports single/dual channel and up to 3 rectifiers (D1–D5 series) .
    UNITROL® 6000 X-power Excitation System High-end, fully customizable system for DC currents from 1,800 A to 12,000 A. Designed for large units in nuclear, coal-fired, gas turbine, and large hydro power plants. Supports up to 8 rectifiers and H-bridge configurations (D5/UNL series) .
    AC 800PEC Control Platform High-performance processor platform for power electronics control. Provides fast I/O (400 µs cycle) and pulse control (down to 25 ns). The core hardware for UNITROL 6000 .
    D1–D5 Series Power Converters Thyristor power converters available in various sizes. D1 is natural-cooled, while D2–D5 are forced-air cooled. Used in both Medium and X-power configurations .
    UNL14300 Power Converter High-power thyristor converter for X-power systems. Supports AC supply up to 1,500 V and is available with 3" or 4" thyristors .
    ECT (Excitation Control Terminal) HMI Industrial touch PC providing user-friendly system operation, monitoring, maintenance, and independent data recording .
    SMTS-RT 6000 Simulation Tool Hardware-in-the-loop simulator that models a generator/motor, turbine/load, and the grid. Used for system testing, parameter tuning, and operator training
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Subject : ABB UNK4806B-G Unitrol M Rack HIER455232

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