363/420kV Gas Insulated Switchgear
ZF28-420 Gas Insulated Switchgear is a three-phase AC high-voltage electrical equipment, which is designed for controlling, measuring, protecting, and switching power transmission lines, and can be combined into the required main wiring arrangement according to user requirements.
Compact structure
High reliability
Excellent performance
High modularity
IEC
Features
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01
Compact structure
The main busbar is three-phase in a common enclosure, allowing for convenient engineering arrangement, enabling the three-phase integrated transportation of the whole bay, and facilitating easy and reliable on-site installation.
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02
High reliability
It adopts a double-channel sealing structure, ensuring an annual gas leakage rate of less than 0.1%. With excellent insulation performance, it exhibits a whole bay partial discharge of less than 3pC. Its circuit breaker is horizontally arranged, with a switching capacity of 63kA, and is equipped with a spring operating mechanism.
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03
Excellent performance
Developed on the basis of 420 series, this product is featured by a larger insulation margin
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04
High modularity
The product boasts a highly modular design. The connecting flanges are of standardized dimensions, allowing for flexible configuration according to requirements, and the modules are highly interchangeable, facilitating expansion and the optimization of substation layout.
Technical Specifications
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Rated voltage
363/420 kV
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Rated frequency
up to 5000 A
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Phase to phase,phase to ground
520 kV
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Across isolating distance
520+210 kV
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Rated lightning impulse withstand voltage（peak value）Phase to phase,phase to ground
1175 kV
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Rated lightning impulse withstand voltage（peak value）Across isolating distance
1175+295 kV
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Rated short-time withstand current
up to 63 kA
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Rated duration of short-circuit
3 s
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Rated peak withstand current
up to 171 kA
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