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

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High Voltage Switchgears Catalog