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420kV Gas-Insulated Switchgear
The ZF28-420 GIS is a complete set of 400kV 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 Long-Term Reliability
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Integrated Security Design
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Engineered to Adapt
Product Highlights
Engineered for Long-Term Reliability
The horizontal circuit breaker is equipped with a spring operated mechanism, which ensures reliable operation. Adopting a dual sealing structure, the annual gas leakage rate is below 0.1% to ensure long-term stable operation. And it features high seismic reliability.
Integrated Security Design
The full range of standardized functional modules are flexibly combined, highly interchangeable, and easy to expand in the later stage. The product can achieve full bay integrated container transportation, and on-site installation is convenient and reliable.
Engineered to Adapt
All 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
420 kV
Rated Current
up to 5000 A
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Phase to Phase,Phase to Ground
650 kV
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Across Isolating Distance
815kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Phase to Phase,Phase to Ground
1425 kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Across Isolating Distance
1425+240 kV
Rated Switching Impulse Withstand Voltage(Peak Value) - Phase to Phase,Phase to Ground
1050kV
Rated Switching Impulse Withstand Voltage(Peak Value) - Across Isolating Distance
900+345 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
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