ZF5T-72.5/126/145 GIS

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Description

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.

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