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Power capacitors

Unfused capacitor units

Eaton's Cooper Power series medium-voltage, single-phase, all-film, unfused capacitors feature extended-foil elements, solderless connections and laser-cut aluminum foil in a high stacking factor design. Designed, manufactured and tested to meet or exceed the requirements of applicable ANSI/IEEE/IEC standards, these capacitors are a simple, economical and reliable source of reactive power on electric power systems.

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Personnel safety
Superior definite tank rupture characteristics
Environmentally friendly
Decreased CO2 emissions
Tailored to application
Various ambient ranges/duty classes Wildfire mitigation

Core features

  • All-film, extended-foil, solderless capacitors with a high stacking factor
  • Stainless-steel tank with light-gray finish for resistance to severely corrosive atmospheres
  • Environmentally acceptable proprietary Edisol VI dielectric fluid that provides an ideal balance between low- and high-ambient temperature operation
  • Light-gray, porcelain bushings: glazed for high strength and durability and hermetically sealed with gasket-free design
  • Internal discharge resistors that reduce terminal voltage to meet IEEE and IEC standards requirements after the capacitor has been disconnected

The benefits of power capacitors

Watch this short video to learn how power capacitors improve your power factor, efficiency and provide substantial benefits to the electrical system.

Wildfire Mitigation unit upgrade

Eaton has developed a Wildfire Mitigation upgrade option that can be added to any capacitor unit duty rating. Design construction features include a thicker wall tank, additional insulation layer, oversized wire leads, and more. This rugged unit is designed to offer a high level of protection and low fire risk, achieving tank rupture curve defined through 20 kA.
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Extreme Duty product extension

The extreme-duty capacitor design family has been tailored to application needs. Units are now available in an Extreme-duty Cold (XDC type), Extreme-duty Base (XDB type), and Extreme-duty Hot (XDH type) offerings. This allows for designs that can service continuous performance in ambient temperatures ranging from -50 to +75 °C.
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Exceptional dielectric solution

Dielectric system utilizing polypropylene film and proprietary Edisol VI fluid achieves industry-leading ambient temperature applications. Each unit is individually monitored in a closed loop fluid impregnation system to prevent contamination. Fluid impregnation and gas molecule evacuation is superior to batch fill designs, resulting in reduced infantile failure rates and lasting performance. Leak and performance testing is conducted on 100% of units at three key manufacturing gates to assure product integrity.

Surge application solution

Eaton’s surge capacitor offering provides a cost-effective solution to absorb energy generated during surges events – lightning strikes, switching surges, equipment failures, etc. Electrical surges are common occurrences on power systems, which can be damaging to sensitive equipment such as transformers, generators, motors, reactors, and other similar type equipment with insulated windings.
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Reliable foil design

Construction features extended-foil elements, mechanically crimped with a laser-cut aluminum foil active edge. Solderless connections eliminate localized heating and cold solder joint failure modes, ensuring exceptional uniform current distribution resulting in outstanding transient performance. Laser cut process precisely controls a uniform rounded edge reducing the electric field stress, significantly increasing the discharge inception voltage (DIV) to the highest design margin in the industry. View TCC curves below:
- Tank-rupture curves for MV SD and HD single-phase capacitors - Tank-rupture TCC for type XDC, XDB and XDH single-phase capacitors - Tank-rupture TCC for wildfire mitigation single-phase capacitors
Specifications

Ratings

Product offerings

Standard-duty (SD type) capacitors

Heavy-duty (HD type) capacitors

Extreme-duty cold (XDC) capacitors

Extreme-duty base (XDB) capacitors

Extreme-duty hot (XDH) capacitors

Wildfire mitigation capacitors
Voltage (V) 2,400 - 22,800
Basic Insulation Level (BIL) 95 - 200 kV
Standard kvar 50 - 800
Temperature rating

-40 to +55 °C (Standard-duty ratings)

-40 to +55 °C (Heavy-duty ratings)

-50 to +40 °C (Extreme-duty cold ratings)

-40 to +55 °C (Extreme-duty base ratings)

0 to +75 °C (Extreme-duty hot ratings)
Continuous rms overvoltage capability

110% (Standard-duty ratings)

125% (Heavy-duty ratings)

125% (Extreme-duty cold ratings)

125% (Extreme-duty base ratings)

125% (Extreme-duty hot ratings)
Peak overvoltage capability

120% (Standard-duty ratings)

135% (Heavy-duty ratings)

135% (Extreme-duty cold ratings)

135% (Extreme-duty base ratings)

135% (Extreme-duty hot ratings)
Tank rupture curve defined through

10 kA (Standard-duty ratings)

10 kA (Heavy-duty ratings)

15 kA (Extreme-duty cold ratings)

15 kA (Extreme-duty base ratings)

15 kA (Extreme-duty hot ratings)

20 kA (Wildfire mitigation ratings)

Unit tank

Tank design 409 stainless-steel, robotically seam welded, gasketless hermetically sealed, light-gray finish
Tank coating Tank is sand blasted, industrial washed and dried, finished with an epoxy primer and a urethane topcoat coating system
Mounting provisions Stainless-steel mounting brackets with industry-standard 15.62-in. mounting center for unit interchangeability; under-side of each bracket is unpainted for positive grounding

Unit features

Number of bushings 1 or 2
Bushing construction Light gray, porcelain bushings: glazed for high strength and durability and molecularly bonded gasketless hermetically sealed to the capacitor tank
Internal discharge resistors Integrated safety provision to dissipate terminal voltage in accordance with IEEE and IEC standards requirements
Terminal size Parallel-groove terminals accommodate copper or aluminum conductors from AWG #8 solid to AWG #1 stranded
Terminal cap Uninterrupted continuous current path from elements to nickel-plated terminal caps utilizing heavy duty lead wires

Application details

Applications Pole-mounted banks, open air banks (externally fused or fuseless), metal-enclosed banks, mobile capacitor bank and specialty applications (HVDC, Series, FACTS)
Protection

Externally fused

Unbalanced protection available in H-Bridge or differential methods

Standards

IEEE

Std 18-2002 (Standard-duty ratings)

Std 18-2012 (Heavy-duty ratings)

Std 18-2012 with temperature exceptions as noted in technical data (Extreme-duty cold, base & hot ratings)
IEC 60871-1
CSA
 CAN/CSA-C871-1
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Power capacitor training

Eaton offers factory, on-site and remote power capacitor training options. 

See training options

New to power capacitors?

Learn about the fundamentals of power capacitors

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Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.
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