550kV Gas Insulated Switchgear
ZF28-550 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
Excellent performance
High reliability
High modularity
IEC
Features
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01
Compact structure
With the circuit breaker horizontally arranged, it features a reasonable overall layout, and the mechanism indicators are positioned for easy observation and inspection.
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02
Excellent performance
The circuit breaker boasts a double fracture structure and has a 63kA breaking capacity at a time constant of 120ms.
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03
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. It enables single-phase whole bay transportation and is featured by high on-site installation efficiency and reliable installation quality.
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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
550 kV
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Rated frequency
up to 6300 A
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Phase to phase,phase to ground
740 kV
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Across isolating distance
740+318 kV
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Rated lightning impulse withstand voltage（peak value）Phase to phase,phase to ground
1675 kV
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Rated lightning impulse withstand voltage（peak value）Across isolating distance
1675+450 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
Tel : +021-61610502
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