Unfused capacitor units

Power capacitors

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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Overview Technical Resources

Personnel safety

Superior definite tank rupture characteristics

Environmentally friendly

Decreased CO2 emissions

Various applications

Standard duty up to extreme duty ratings

Core features

All-film, extended foil, solderless capacitors with a high stacking factor
Stainless steel tank with light grey 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 grey, 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 requirements after the capacitor has been disconnected
Blue, non-PCB decal provided on each unit

Reliable foil design

Construction features extended-foil elements, mechanically crimped with a laser-cut aluminum foil active edge. Solderless connections eliminate localised heating and cold solder joint failure modes, ensuring exceptional uniform current distribution and resulting in outstanding transient performance. Laser cut process precisely controls a uniform rounded edge, reducing the electric field stress and significantly increasing the discharge inception voltage (DIV) to the highest design margin in the industry.

Exceptional dielectric solution

Dielectric system utilising 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.

Universal solution for multiple applications

Eaton’s capacitor design has been field proven in a variety of applications. Product expertise is drawn on to make a standard design capable of being tailored to individual needs such as indoor and outdoor applications, pole-mounted, open air, metal enclosed and mobile bank solutions and specialised needs including shunt, series, high voltage direct current (HVDC), static var compensation (SVC), filter applications and micro banks.

Severe environmental exposure

Eaton's capacitor units are designed, constructed and tested to provide unparalleled performance in the harshest environments. The tank is constructed from titanium stabilised 409 stainless steel, robotically welded and painted with epoxy primer and urethane topcoat. This construction features a copper impregnation fill tube, nickel plated terminals and patented bonding techniques. Extra creepage bushings are available for contaminated and high altitude needs. Units are validated to ANSI C57.12.29 coastal environment standard.

Specifications

Ratings

Product offerings	Standard-duty (SD type) capacitors Heavy-duty (HD type) capacitors Extreme-duty (XD type) capacitors
Voltage (V)	2,400 - 22,800
Basic Insulation Level (BIL)	95 - 200 kV
Standard kvar	50 - 600
Temperature rating	-40 to +55 °C (Standard-duty ratings) -40 to +55 °C (Heavy-duty ratings) -50 to +55 °C (Extreme-duty ratings)
Continuous rms overvoltage capability	110% (Standard-duty ratings) 125% (Heavy-duty ratings) 125% (Extreme-duty ratings)
Peak overvoltage capability	120% (Standard-duty ratings) 135% (Heavy-duty ratings) 135% (Extreme-duty ratings)
Tank rupture curve defined through	10kA (Standard-duty ratings) 10kA (Heavy-duty ratings) 15kA (Extreme-duty ratings)

Enclosure

Tank design	409 stainless-steel, 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

Devices

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 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

System

Applications

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

Protection

Externally fused

Unbalance protection (H+ Diff)

Standards

IEEE

Std 18-2002 (Standard-duty ratings)

Std 18-2012 (Heavy-duty ratings)

Std 18-2012 (Extreme-duty ratings)

IEC

60871-1

CSA

CAN/CSA-C871-1

Download Links

Brochures

Catalogues

Medium-voltage standard-duty, heavy-duty, and extreme-duty single-phase, unfused capacitor units and accessories catalog

This catalog describes Eaton's Cooper Power series all-film, unfused capacitors featuring extended-foil elements, solderless connections and laser-cut aluminum foil (folded foil optional) in a high stacking factor design.

(PDF 147 KB , 10/11/2021)

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Installation instructions

Medium-voltage, single-phase capacitor installation and maintenance instructions

This document describes the installation and maintenance instructions for Eaton’s Cooper Power series line of medium-voltage, single-phase capacitors.

(PDF 626 KB , 30/11/2016)

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Product specification guides

Medium-voltage power capacitor specification

This is a CSI formatted construction guide specification for medium-voltage capacitors.

(DOCX 290 KB , 04/06/2020)

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Sales notes

Capacitor unit ordering guide

This form guides the user through ordering Eaton's Cooper Power series capacitor unit.

(PDF 282 KB , 28/09/2018)

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Time current curves

Tank rupture curves for MV SD and HD single-phase capacitors

This document is the tank-rupture TCC for Eaton's Cooper Power series medium-voltage type SD and HD single-phase capacitors.

(PDF 233 KB , 24/01/2023)

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Tank-rupture TCC for type XDC, XDB and XDH single-phase capacitors

This document contains the tank-rupture TCC for Eaton's Cooper Power series type XDC, XDB and XDH single-phase capacitors.

(PDF 283 KB , 31/01/2023)

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Tank-rupture TCC for wildfire mitigation single-phase capacitors

This document is the tank-rupture TCC for Eaton's Cooper Power series medium-voltage This document is the tank-rupture TCC for Eaton's Cooper Power series wildfire mitigation single-phase capacitors.

(PDF 239 KB , 24/01/2023)

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White papers

Capacitor bank protection design consideration white paper

This white paper discusses design considerations and system implications for Eaton’s Cooper Power series externally fused, internally fused or fuseless capacitor banks.

(PDF 685 KB , 21/09/2021)

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Capacitor element technology: Improving system reliability and performance white paper

This white paper describes manufacturing and design innovations incorporated within Eaton’s Cooper Power series power capacitor offerings including Standard-duty (SD type), Heavy-duty (HD type), Extreme-duty (XD type) and Internally fused units resulting in numerous performance, packaging and safety advantages.

(PDF 951 KB , 09/04/2019)

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Eaton capacitors dielectric performance under dc voltage stress white paper

This document describes the resolution of capacitor failures at a utility’s ungrounded-wye banks.

(PDF 333 KB , 01/03/2017)

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Optimal allocation of a capacitor bank in the power distribution system white paper

This white paper discusses how the optimal use of a capacitor bank in the energy distribution system was addressed with the aid of Eaton CYMDIST software.

(PDF 667 KB , 24/11/2020)

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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.