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252kV Hybrid Gas-Insulated Switchgear
The ZF28-252 HGIS is a complete set of 220 kV high-voltage three-phase AC switchgear. The whole equipment features 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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Flexible Layout
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Engineered for Long-Term Reliability
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Security Engineered Throughout
Product Highlights
Flexible Layout
The main busbar and disconnecting switch module can achieve three-phase common box or three-phase separating, and the engineering layout is flexible. Modular design, standard flange size for connection, strong interchangeability, easy expansion to optimize substation layout.
Engineered for Long-Term Reliability
Adopting dual sealing structure, the annual gas leakage rate is less than 0.1%. Excellent insulation performance, with a partial discharge of less than 3pC for the entire bay. Transport the whole bay as three-phase integrated; Convenient and reliable on-site installation.
Security Engineered Throughout
The horizontal circuit breaker is equipped with a fully spring operated mechanism, which has a low center of gravity and low impact, and can achieve three-phase mechanical linkage or three-phase electrical linkage.
Technical Specification
Rated Voltage
252 kV
Rated Current
up to 5000 A
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Phase to Phase,Phase to Ground
460 kV
Rated Short-Duration Power-Frequency Withstand Voltage(1 min,Effective Value) - Across Isolating Distance
460+154 kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Phase to Phase,Phase to Ground
1050 kV
Rated Lightning Impulse Withstand Voltage(Peak Value) - Across Isolating Distance
1050+206 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
