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Open air capacitor banks

Eaton's comprehensive line of Cooper Power series open air bank solutions are available in externally fused, fuseless or internally fused designs. Each design is custom-configured in a variety of parallel/series combinations to meet a full range of application needs based on kvar requirements, system voltage, protection strategy and system solutions. Open air banks provide economical and reliable methods for reducing losses and improving power quality.

Open air substation capacitor bank
Engineered-to-order solution
Custom designed to meet specific application needs
Complete line of accessories
Easy integration
System improvements
Improved power factor and reduced losses

Core features

  • Unfused [(Standard-Duty (SD), Heavy-duty (HD) and extreme-duty (XD)] or Internally fused
  • Available with units mounted vertically or horizontally, based on installation conditions
  • Robust lightweight welded aluminum frame (steel optional)
  • Frame-integrated lifting provisions
  • Externally fused banks available with expulsion or current limiting fuses connected to each unit
  • Compact relay protected fuseless banks utilizing series string configuration
  • Station-class bus support insulators

Modular construction

Eaton’s Cooper Power series open air capacitor banks utilize a range of frame structures and bus configurations that can be scaled and configured to meet application needs. These customizable configurations can apply a variety of series-parallel connections and allow for side-by-side or phase-over-phase bank orientations. Modular assemblies can optimize system footprint, reduce installation time and labor and allow for banks to be reconfigured, extended or relocated over time as system demands evolve.

Utilize orientations to meet specific installation needs

Eaton's Cooper Power series open air capacitor banks are available with capacitor units in vertical or horizontal orientations. Vertical orientation results in bushings at right angles with respect to mounting floor. This type of construction is typically utilized to limit the bank footprint within the substation area and provide additional safety benefits. Horizontal orientation results in bushings being parallel with the ground. This type of construction is typically utilized when overall height is a limitation or more than 3 blocks are being stacked on top of each other. When facing significant height limitations, flat mounting is available.

Robust and reliable structure

Eaton’s Cooper Power series open air bank designs utilize a 6061-T6 aluminum welded frame delivering a high strength, light weight and corrosion resistant solution. Frames are analyzed by in-house structural engineering and are fabricated in our factory. Frames are also available with galvanized steel construction most commonly utilized in exceptionally large banks, or to meet application specific needs. Banks are engineered to meet specific site requirements including; wind, ice, other environmental conditions and seismic-specified loading.