Gas Insulated Substation

Gas Insulated Substation

Category

A Gas Insulated Substation (GIS) is a compact, high-voltage power substation where major components like circuit breakers, isolators, and busbars are enclosed in a sealed environment filled with SF6 (sulfur hexafluoride) gas. This design ensures efficient insulation, arc quenching, and protection from environmental conditions.

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Gas Insulated Substation – Specifications

Feature Details
Voltage Rating Ranges from 72.5 kV to 800 kV for transmission applications
Current Rating Up to 5000A for high-demand power systems
Insulation Medium SF6 gas for excellent dielectric properties
Fault Current Capacity Up to 63 kA for effective fault protection
Design Type Modular design for flexible configurations
Space Efficiency Requires up to 70% less space than AIS (Air Insulated Substations)
Operating Environment Suitable for indoor and outdoor installations
Maintenance Requirement Minimal maintenance due to enclosed design
Compliance Standards Adheres to IEC 62271-203 and IEEE C37.122 standards

 

Rated Voltage 72.5 to 245kV
Rated Current Upto 4000A
Frequency 50/60 Hz
short-circuit breaking current  Upto 50kA
Lightning impulse withstand level-LIWL upto 1050 kVp
Peak Withstand Current Upto 125 kAp

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