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Transmission & Distribution

Core business that leads the global heavy electric machinery market

High Voltage Switchgears

Hyosung Heavy Industry has been developing its products and services during the past four decades since when Gas Circuit Breaker (GCB) for 170kV was first developed in 1978. Throughout the experience, we have successfully supplied to forty different countries with our products of which rated voltage up to 800kV.
Our high voltage circuit breakers are designed in compact size and convenience for its maintenance. Its quality and reliability are also well recognized around the world as we get approved from the international certification bodies such as KERI, CESI, and KEMA.

Features and Benefits

Compact Design
Can be contributed to lower down the construction costs for substation, with its smaller size of products compared to other companies.
Easy to build in urban region and underground area.
Superior Safety and Reliability
Personnel safeties are ensured by an earthed enclosure, interlocks, and lockout devices.
Greater stability is provided during earthquakes and the perfect enclosure protects from loss or damage from salt, dirt, lightning, and typhoon.
While the SF6 gas insulation prevents deterioration, the partition of the gas prevents accidents from occurring.
Designed for user convenience
Considering the convenience of operation and maintenance of user from product development / design.
Various Supply Records
Quality of the products were recognized from three-hundred customers in forty different countries around the world.
Sustainable Innovation
Constantly developing the products to be innovative through GIS R&D center.

Product Type and Specifications

  • 72.5kV GIS

    72.5kV GIS
    Rated Voltage(kV) 72.5kV
    Rated Breaking Current,(kA) up to 40kA
    Rated Current(A) up to 2500A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/ year
  • 145kV GIS

    145kV GIS
    Rated Voltage(kV) 145kV
    Rated Breaking Current,(kA) up to 40kA
    Rated Current(A) up to 3150A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Most compact size in the industry
      • Bay width 800mm
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
    • Easy access for operation and maintenance
  • 170kV GIS

    170kV GIS
    Rated Voltage(kV) 170kV
    Rated Breaking Current,(kA) up to 50kA
    Rated Current(A) up to 4000A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Most reliable model in the industry
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
  • 245/300kV GIS

    245/300kV GIS
    Rated Voltage(kV) 245/300kV
    Rated Breaking Current,(kA) up to 63kA
    Rated Current(A) up to 4000A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Most compact size in the industry
      • Bay width 1500mm
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
    • Easy access for operation and maintenance
  • 362kV GIS

    362kV GIS
    Rated Voltage(kV) 362kV
    Rated Breaking Current,(kA) up to 63kA
    Rated Current(A) up to 8000A
    Rated Frequency(Hz) 60Hz
    Characteristics
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
  • 420kV GIS

    420kV GIS
    Rated Voltage(kV) 420kV
    Rated Breaking Current,(kA) up to 63kA
    Rated Current(A) 4000A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Stable quality with no capacitor in the circuit breaker
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
  • 550kV GIS

    550kV GIS
    Rated Voltage(kV) 550kV
    Rated Breaking Current,(kA) up to 63kA
    Rated Current(A) 4000A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Stable quality with 1 pole breaker
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year
  • 800kV GIS

    800kV GIS
    Rated Voltage(kV) 800kV
    Rated Breaking Current,(kA) up to 50kA
    Rated Current(A) 4000A
    Rated Frequency(Hz) 50/60Hz
    Characteristics
    • Stable quality with 2 pole breaker
    • Proven reliability
      • Mechanical endurance class M2
      • Capacitive current switching class C2
    • Guaranteed Gas leakage
      • less than 0.1%/year

Reference

Main Delivery Countries

Key Delivery Performance

  • South Korea, 550kV HVDC Filter GIS for Korea Electric Power Corporation (KEPCO) Goduk and Bukdangjin
  • South Korea, 362kV GIS and 170kV GIS for Samsung Electronics
  • India, 800kV GIS for 7 Substations Including PGCIL Nizamabad
  • Australia, 145kV GIS for Endeavour Energy
  • Saudi Arabia, 420kV GIS and 145kV GIS for SEC JFH
  • Brazil, 550kV GIS for Energia Sustentável do Brasil
  • Saudi Arabia, 145kV GIS for National Grid (Initial Direct Order)
  • China, 800kV GIS for State Gird and China High Voltage
  • Ukraine, 145kV GIS for NPC UKRENERGO

Contact Information

※ We will contact you as soon as possible after confirming your inquiry.

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