ZF5T-72.5/126/145 GIS
Inquire NowDescription
Gas Insulated Switchgear (GIS) ZF5T-72.5/126/145 is a cutting-edge 3-phase AC high voltage switchgear designed for the effective control, measurement, protection, and switching of transmission lines. Since its introduction in 1984, it has successfully operated in over 5000 bays worldwide, with installations in countries such as Thailand and Equatorial Guinea. This advanced system encompasses essential substation equipment, including circuit breakers, disconnectors, earthing switches, voltage transformers, current transformers, and surge arresters, all housed within a compact and robust enclosure.
Main Features:
- The oil/gas-free mechanism ensures a simple construction, easy maintenance, and reliable operation.
- Constructed from lightweight aluminum alloy, it offers low temperature rise and strong anti-corrosion properties.
- Featuring double sealing systems for high gas tightness with an annual gas leakage rate of less than 0.5%.
- Provides excellent insulating, conducting, and current carrying performances.
Specifications
Specifications | Unit | Value | |||||
---|---|---|---|---|---|---|---|
Rated voltage | kV | 72.5 | 126 | 145 | |||
Rated current | A | 2000/3150 | |||||
Rated frequency | Hz | 50/60 | |||||
Rated short-time withstand current | kA | 40 | |||||
1min rated power frequency withstand voltage | To earth & between pole | kV | 140 | 230 | 275 | ||
Across isolating distance | kV | 160 | 265 | 315 | |||
Rated lightning impulse withstand voltage | To earth & between pole | kV | 325 | 550 | 650 | ||
Across isolating distance | kV | 375 | 630 | 750 | |||
Rated SF6 gas pressure (20°C) | CB compartment | MPa | 0.5 | ||||
Others | MPa | 0.4 | |||||
Rated SF6 annual leakage | % | ≤0.5 |
Additional Information
This Gas Insulated Switchgear is ideal for high voltage applications, ensuring safety, reliability, and efficiency in power transmission networks. Its design minimizes maintenance requirements and maximizes operational lifespan, making it a preferred choice for modern electrical substations.