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550kV Gas-Insulated Switchgear
The ZF28-550 GIS is a complete set of 500kV high-voltage three-phase AC switchgear. The whole equipment adopts a fully enclosed, modular aluminium alloy structure, which can be flexibly combined into different main wiring methods according to user needs. It has strong interchangeability and is easy to expand.
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Engineered for Peak Performance
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Engineered for Long-Term Reliability
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Engineered to Adapt
Product Highlights
Engineered for Peak Performance
The circuit breaker adopts dual break self extinguishing arc technology. The operating mechanism is set at a low position for easy inspection and maintenance. Optimize the electric field structure, effectively suppress ultra fast transient overvoltage, and protect valuable primary equipment such as main transformers in the station.
Engineered for Long-Term Reliability
A full range of standardized functional modules, flexible combination, strong interchangeability, and easy to expand in the later stage. The product can achieve whole phase transportation, standardized on-site docking, and easy and reliable installation.
Engineered to Adapt
Full metal enclosed structure, with internal components completely isolated from the external environment, can meet various environmental requirements. The equipment operates with low noise and minimal electromagnetic radiation.
Technical Specification
Rated Voltage
550 kV
Rated Current
up to 6300 A
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Phase to Phase,Phase to Ground
740 kV
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Across Isolating Distance
740+318 kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Phase to Phase,Phase to Ground
1675 kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Across Isolating Distance
1675+450 kV
Rated Short-Time Withstand Current
up to 63 kA
Rated Duration of Short-Circuit
3 s
Rated Peak Withstand Current
up to 171 kA
