Model: ZF7A-126 / ZF7A-145/T3150-40
This spring-operated GIS 145kV/3150A/40kA is very similar in design to the 72.5kV model. It has been tested by both KEMA in the Netherlands and CESI in Italy. The product features a common three-phase design, spring/spring mechanism, excellent insulation, and interrupting capabilities. More than 14,000 GIS cells of this design type have been put into operation at power plants and transmission networks worldwide.
Main Features
- Common single and double busbar configuration for 3 phases
- Compact GIS with reduced dimensions: L x W x H: 6600mm x 800mm x 3150mm
- Circuit breaker with spring mechanism, type CT20
- Disconnector and Earthing Switch (DES)
- DES equipped with a motor drive
- Fast Earthing Switch (FES) equipped with a spring mechanism
- 20-year maintenance cycle
- Integrated earthing switches
- Exclusive sealing technology (less than 0.5% leakage per year)
- Suitable for indoor substations up to 145kV, 40kA, 3150A
- Fully assembled cell fits in a standard shipping container
Advantages
- High Insulation Margin: The electric field intensity on the surfaces of insulating parts and conductors is calculated to maintain a low, reliable level by optimizing electrode profiles, materials used, and manufacturing technologies.
- Excellent Interrupting Properties: The interrupting device uses advanced arc-quenching technologies, utilizing both arc energy and spring mechanism energy, ensuring reliable interruption of short-circuit and load currents at all levels up to the rated values.
- Excellent Seismic Resistance: The overall design is characterized by simplicity of structure, lightness, and a low center of gravity, providing excellent resistance to seismic impacts.
