145kV Gas Insulated Switchgear
ZF28A-145 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
High safety
High modularity
IEC
Features
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01
Compact structure
It features a three-phase common enclosure design, allowing for flexible and convenient engineering arrangement.
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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. It also features a three-station isolation earthing switch structure, which includes mechanical interlock between the isolation and earthing mechanisms for effectively avoiding misoperation.
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03
High safety
With busbars and outgoing lines arranged on both sides of the circuit breaker, and inspection and maintenance accesses provided on both sides of the bay, it eliminates the need to enter the bay for routing inspection.
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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
145 kV
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Rated frequency
up to 3150 A
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Phase to phase,phase to ground
275 kV
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Rated short-duration power-frequency withstand voltage（1 min，effective value）Across isolating distance
275+92 kV
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Rated lightning impulse withstand voltage（peak value）Phase to phase,phase to ground
650 kV
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Rated lightning impulse withstand voltage（peak value）Across isolating distance
650+118 kV
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Rated short-time withstand current
up to 40 kA
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Rated duration of short-circuit
4 s
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Rated peak withstand current
up to 104 kA
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