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Gas-insulated Switchgear (GIS)Gas-insulated Switchgear (GIS)
STANDARDS
• IEC 62271-203High-voltage switchgear and controlgear –Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV
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Cost Comparison of AIS and GIS Sub-stations
REFERENCE: Electrical Engineering Handbook, Taylor & Francis Group
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GIS Main Components
1. Circuit Breaker
2. Disconnector and Earthing Switch
3. Make-proof earthing switch
4. Current and Voltage Transformers
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3-Positin Disconnector and Earthing Switch
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Make-Proof Earthing Switch
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420kV Make-Proof Earthing Switch
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Current and Voltage Transformers
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420kV Voltage Transformer
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420kV Current Transformer
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Gas Barrier
Support insulator for GIS (communicating) Support insulator for GIS (non-communicating)
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Cable End Unit, Gas-to-Air Bushings
Plug-in dry type cable connection SF6-Gas-to-air bushing to connect overhead lines
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Single Line Diagram Single busbar
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Single Line Diagram Double busbar
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Single Line Diagram• Ring busbars
