363/420kV Hybrid Gas Insulated Switchgear
Key attributes
| Brand | ROCKWILL |
| Model NO. | 363/420kV Hybrid Gas Insulated Switchgear |
| Rated voltage | 420kV |
| Rated short-time withstand current | 63kA |
| Series | ZF28 |
Product descriptions from the supplier
Description
Product Description
ZF28-420 Hybrid 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.
Features
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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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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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Excellent performance：Developed on the basis of 420 series, this product is featured by a larger insulation margin.
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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.
Product Parameters
| Rated voltage | 363/420 kV |
| Rated frequency | up to 5000 A |
| Rated short-duration power-frequency withstand voltage（1 min，effective value）Phase to phase,phase to ground | 520 kV |
| Rated short-duration power-frequency withstand voltage（1 min，effective value）Across isolating distance | 520+210 kV |
| Rated lightning impulse withstand voltage（peak value）Phase to phase,phase to ground | 1175 kV |
| Rated lightning impulse withstand voltage（peak value）Across isolating distance | 1175+295 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 |
