Primary switchgear ZF12B

high-voltagegas-insulatedcompact

Product overview
The newly developed 72.5 kV gas-insulated switchgear (GIS) ZF12B is intended for offshore wind power, flexible HVDC transmission and offshore converter stations. Rated currents are available in 1250 A / 2000 A / 3150 A / 4000 A, enabling installation inside wind turbine towers and in offshore collection/conversion platforms to provide a flexible solution from generation to collection. Six-point anti-corrosion metal-rubber dampers are provided between the turbine base frame and the foundation to absorb steel-beam deflection and foundation vibration. Enclosure, connection components and exposed metals meet corrosion class C4-H, with equipment specified for safe and reliable operation for over 30 years.

Main features

• Maintainability: module can enter and exit the wind turbine tower; plug-in standard F-type bushings allow replacement without full dismantling of adjacent structures, shortening installation and maintenance time.
• Small footprint: overall dimensions L×W×H: 2600×900×2000 mm — among the smallest and lightest in its class, suitable for installation inside turbine towers for onshore and far-offshore applications.
• Electrical ratings: platform rated current 2000 A / 3150 A; busbar rated 4000 A; short-time withstand current 40 kA; peak withstand current 100 kA.
• Compact design: height below 2.5 m and minimum center distance 0.7 m, reducing total station footprint and weight.
• Anti-settlement: combination of flexible connection structures to address settlement in long converter-station platforms; settlement between any two supports meets a 0.3% span requirement.
• Offshore suitability: corrosion protection C5-M available for platform; corrosion class C4-H for enclosure and exposed metal; seismic class AG5; operable in high-humidity environments (up to 100% RH).

Category
High-voltage business - combined electrical apparatus

Application scenarios
Suitable for offshore wind farms, flexible HVDC transmission projects, offshore converter stations and electrical collection inside wind turbine towers.

Specifications / Technical data

• Model: ZF12B (see commercial model marking)
• Rated voltage: 72.5 kV
• Rated current (options): 1250 A / 2000 A / 3150 A / 4000 A
• Platform rated current: 2000 A / 3150 A
• Busbar rated current: 4000 A
• Short-time withstand current (Ik): 40 kA
• Peak withstand current (Ipk): 100 kA
• Overall dimensions (L×W×H): 2600 × 900 × 2000 mm
• Maximum height: less than 2.5 m
• Minimum center distance: 0.7 m
• Corrosion protection: enclosure and exposed metals meet C4-H (platform can meet C5-M for offshore use)
• Seismic class: AG5
• Vibration isolation: six-point metal-rubber dampers between turbine base frame and foundation
• Operating humidity: suitable for 100% relative humidity environments
• Design life / reliability: enclosure, connection parts and exposed metals specified for safe, reliable operation for over 30 years