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of 10/10 Power Systems PU HYOSUNG GIS 2009. 10 HEAD OFFICE 450, Gongdeok-Dong, Mapo-Gu, Seoul, Korea 121-720 TEL : 82-2-707-7000 R&D CENTER 183, Hogye-Dong, Dongan-Gu, Anyang-Shi, Gyeonggi-Do, Korea 431-080 TEL : 82-31-428-1000 CHANGWON PLANT 454-2, Nae-Dong, Changwon-Shi, Gyeongsangnam-Do, Korea 641-712 TEL : 82-55-268-9114 Gas Insulated Switchgear DIRECT CONTACT Head Office TEL : 82-2-707-6180~9 FAX : 82-2-707-6117

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  • Power Systems PU


    2009. 10

    HEAD OFFICE450, Gongdeok-Dong, Mapo-Gu, Seoul, Korea 121-720TEL : 82-2-707-7000

    R&D CENTER183, Hogye-Dong, Dongan-Gu, Anyang-Shi, Gyeonggi-Do, Korea 431-080 TEL : 82-31-428-1000

    CHANGWON PLANT454-2, Nae-Dong, Changwon-Shi, Gyeongsangnam-Do, Korea 641-712TEL : 82-55-268-9114

    Gas Insulated Switchgear

    DIRECT CONTACT Head Office

    TEL : 82-2-707-6180~9 FAX : 82-2-707-6117

  • CONTENTS 04 General 05 Special Features 06 Quality Assurance

    08 Design and Technical Details 10 Construction Details of Equipment 14 Preventive and Diagnosis 16 Transportation, Installation and Maintenance

    18 Research & Development 19 Network

    Power &Industrial SystemsPerformance Group

    Power Systems Performance Unit

    Power Systems Performance UnitGas Insulated SwitchgearUHV Power TransformerEHV Power TransformerDistribution TransformerCast Coil TransformerGas Circuit BreakerControl PanelWelder

    Industrial Machinery Performance UnitElectric MotorsGear Reducers GeneratorsChemical Process EquipmentIndustrial MachineryRopewaysCNG Refill Stations

    Hyosung Power Systems strives to enhance the lives of people all over the

    world while conserving earths natural resources. With the goal to become a

    Leading Global Energy Solution Provider, Hyosung will pave the way

    towards next-generation technology and green energy solutions.

    Hyosung Power Systems has been continuously enhancing customers value since it started its operations in 1962.

    With core values focused on customer-oriented management, technological innovation and reliable quality,

    Hyosung Power Systems has built strong customer relationships based on trust and respect over the years.

    It promises to continue its quest to provide value-added products that enhances industrial productivity while

    conserving both energy and environment for clients all over the world.

  • Gas Insulated Switchgear 4/5

    Hyosung designs and manufactures a wide variety of SF6 Gas-Insulated Switchgear (GIS) system to satisfy customers specificsubstation requirements. Hyosung believes in giving you the highest quality system at a reasonable price. Hyosungs units arecurrently installed in urbanized areas and built near industrial areas, including underground power substations in large commercialbuildings, switchyards of power plants and new or expanding substations. Hyosung prides itself on the ability to design and manufacture GIS that is 100% compatible with your exact specifications.Hyosung designs and constructs a wide variety of high voltage SF6 GIS ranging from 25.8kV units to 800kV units, with short circuitratings up to 63kA. All of Hyosungs equipments comply with IEC, ANSI, IEEE and other international standards and it has shippedcustomers around the world.

    I General I I Certificates I

    High ReliabilityFeatures enhanced insulating properties and reduced long-term operational costsby means of sealed metal enclosure filled with SF6 gas assuring first-rate reliability.

    Compact DesignPossesses extensive experience in designing optimum phase and feeder spacingdimensions according to site conditions. This results in compact dimensions thatreduce space requirements to less than 20% of conventional air-insulatedsubstations.

    SafetyEnsures personnel safety by earthed enclosure, numerous interlocks and lockoutdevices and provides greater stability during earthquakes with a low center of gravity.

    Elimination of Periodic MaintenanceVirtually eliminates long-term maintenance costs and contamination of criticalcomponents by means of SF6 gas-filled metal enclosures, automatic monitoring ofoperating mechanisms and SF6 gas system.

    Efficient InstallationReduces installation time and costs since assembly is performed in the factoryand shipped in one complete bay.

    Environmental CompatibilityMinimizes operation noise to make it advantageous for urban and suburbanindoor substations. Also eliminates radio interference problems.

    I Special Features I

    Hyosungs commitment to quality is exemplified by its ability to deliver on-time and produce high quality products at competitive prices. The qualitylevel of products is sustained by Hyosungs integrated Quality Assuranceprogram. The Quality Assurance program was created by combiningHyosungs professional experience with abundant operating knowledgeaccumulated from the earliest phases of industry development. In addition,customers requirements are recognized from design to assembly, testingand installation and each process is carried out with the companysmanufacturing motto of customers goal is Hyosungs goal as a foundation.This type of focus and commitment to quality has allowed Hyosung tosurpass its competitors in quality and reliability.

    I About Quality Assurance at Hyosung I

    ISO 9001 ISO 14001 OHSAS 18001 CESI KEMA KERI

  • Gas Insulated Switchgear 6/7

    Quality Assurance

    Hyosungs Research and Development activities are dedicated to providing customers with the solutionsthat are demanded at the present and the future. The latest computer assisted software and systems areapplied to the design analysis of each GIS for the best quality and reliability.

    01_Design Process

    All critical components of Hyosung GIS are assembled in a clean room as a safety measure againstcontaminants. These critical components are then installed in their enclosure and pressurized with SF6gas. All openings are sealed to prevent dust from entering during shipping.

    02 _Assembly Process

    Layout Foundation Drawing Structure Drawing Block Diagram


    Assembly Drawing Manufacturing Drawing

    Detail Design

    Detail Drawing BOM

    Drawing/ Document

    Hyosung performs tests based on international standards and customersrequirements. Hyosung also strives to exceed all established testing criteria bycarrying out additional tests that it considers essential in advancing the currentquality of its product.

    03 _Testing Process

    All components are completely assembled into one compact unit, tested in thefactory and shipped in one complete bay. Through this, Hyosung minimizesinstallation time and cost and passes on the savings to its customers. When thecomponent arrives at its destination, Hyosung engineers are standing-byduring installation to ensure that your new GIS is not only installed correctlybut functioning to match your exact specification by performing tests throughvarious tools and testing equipments. The final commissioning test, whichconsists of various essential analysis, is performed before the final acceptanceof the product.

    04 _Installation Process

  • Design and Technical Details

    Gas Insulated Switchgear 8/9

    Type and Rating

    Rated voltage(kV)

    Phase per enclosure

    Rated interrupting current(kA)

    Lightning impulse withstand voltage(kV)

    Power frequency withstand voltage(kV)


    72.5 / 145



    325 / 650

    140 / 275

    Three-phase common type

    245 / 300


    40 & 50



    Three-phase isolated type



    40 & 50



    Three-phase isolated type

    420 / 550


    63 / 50 & 63

    1425 / 1550

    650 / 710

    Three-phase isolated type






    Three-phase isolated type

  • Gas Insulated Switchgear 10/11

    Construction Details of Equipment

    About Hyosung GIS Construction

    Double flow synchronized axial blast method significantly boosts circuit breaking performance andenables single-pole structure. Double trip coils ensure reliable circuit breaking performance combinedwith anti-pumping and trip-free function. Hydraulic and spring mechanism, as well as highly reliablepneumatic operating mechanism based on Hyosungs long experience, is available upon request. Anaccumulator(reservoir) enables the circuit breaker to close and open twice before needing to berecharged. This structure provides simple and trouble-free maintenance.

    01_Circuit Breakers

    A typical GIS arrangement consists of a circuit breaker, disconnecting switch, earthing switch, busbar,voltage transformer, current transformer, and lightning arrester. Gas sections are used as spacers inorder to minimize problem areas, allow prompt repair, and monitor gas effectively. Manholes areavailable in each section to facilitate inspection and maintenance. This arrangement allows connectionsto the bushings, cable head, and bus duct.

    Configuration of Circuit Breaker Configuration of Interruptor

    The disconnecting switches are motor driven, motor drive-spring charged orpneumatic and features three-phase gang operation. Essentially, this designsupports not only no-load switching operations, but upon customer request,facilities for capacitive charging current, transformer magnetizing current, andloop current can be added. A mechanical indicator fixed to the operating shaftinside the operating mechanism box provides a visual means of checkingoperating position. Visual inspection windows can be installed as well.

    02 _Disconnecting Switches

    Every earthing switch has a short-time current endurance function. They aredivided into two types with each one having its own particular functions. Thefirst is the maintenance earthing switch, and it is motor driven or pneumatic.The second, the high-speed earthing switch, can be motor drive-springcharged or pneumatic. Manual operation is possible for all types. High-speedearthing switch has a short circuit making current capability. The earthingswitches can be used as primary injection terminals for checking voltages andcurrents. It i