Internally fused capacitor units

Eaton's Cooper Power series, medium-voltage, single-phase, all-film internally fused capacitors feature the latest design innovations: extended foil, solderless connections, CLEANBREAK fusing system and laser-cut aluminium foil. Designed, manufactured and tested to meet or exceed the requirements of applicable ANSI/IEEE /IEC standards, their extended reliability provides low cost per kvar – making these capacitors a simple, economical source of reactive power.

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Overview Technical Resources

Space saving

Footprint reduction and smaller enclosures

Robust materials

Longer service life

Various applications

Meets IEEE and IEC standard requirements

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
CLEANBREAK element fusing system
Blue non-PCB decal provided on each unit

Innovative Cleanbreak system

Eaton's patented design ensures individually protected elements and prevents cascading failure. Polymer fuse tubes with isolated mounting avoids damage to adjacent components. Paperless design eliminates the generation of extensive carbon arc byproducts in the dielectric fluid. Fuse operation reduces stored parallel-element energy from being discharged into the fault, which minimises gas contamination and further damage, resulting in life extension and improved dielectric performance.

Reliable foil design

Construction features extended-foil elements, mechanically crimped with a laser-cut aluminium foil active edge. Solderless connections eliminate localised heating and cold solder joint failure modes, assuring 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 upon 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

Voltage (V)	2,400–16,500
Basic insulation level (BIL)	95–200 kV
Standard kvar	100–1000
Temperature rating	Per required temperature category

Enclosure

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

Devices

Number of bushings	1 or 2
Bushing construction	Light grey, porcelain bushings; glazed for high strength and durability, gasketless, molecularly bonded and 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 aluminium conductors from AWG #8 solid to AWG #1 stranded
Terminal cap	Uninterrupted continuous current path from elements to nickel-plated terminal caps using heavy duty lead wires
Fuse protection	CLEANBREAK element fusing system

System

Applications	Open air banks, metal-enclosed banks, mobile capacitor banks and speciality applications (HVDC, SVC)
Protection	Unbalance protection (H+ Diff)

Standards

IEEE

Std. 18

IEC

60871-1

60871-4

CSA

CAN/CSA-C871-1

Download Links

Brochures

Commercial and industrial medium-voltage electrical distribution products brochure

This brochure outlines Eaton’s Cooper Power series broad commercial and industrial medium-voltage transformer, switchgear, fuse, sectionalizer, switch, regulator, tool, OEM equipment, cable accessory, lightning arrester, power capacitor and recloser offerings.

(PDF 2 MB , 24/01/2023)

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Eaton's Greenwood, SC, Emerald Road facility zero-waste-to-landfill certification product aid

This brochure outlines Eaton’s Greenwood, SC, Emerald Road facility continued environmental commitment.

(PDF 395 KB , 11/02/2020)

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Eaton's Greenwood, SC, facility sustainability brochure

Eaton’s Greenwood, SC facility on Emerald Road is setting the standard for sustainability in Eaton’s Power Systems Division.The location is the production facility for Eaton’s power capacitor and network protector product lines. This site has continually demonstrated its focus on sustainability activities and minimizing its environment impact.

(PDF 831 KB , 05/05/2021)

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Power capacitor recycling program brochure

This brochure describes Eaton's comprehensive capacitor unit recycling program which includes onsite material pickup and supports all units regardless of age, original manufacturer or current condition.

(PDF 405 KB , 17/04/2020)

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Power capacitors brochure: It's what's on the inside that matters

This brochure describes what's inside an Eaton Cooper Power series power capacitor, what you need to know when selecting a power capacitor and the anatomy of a power capacitor.

(PDF 942 KB , 31/07/2020)

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Surge capacitors product aid

This brochure describes Eaton’s Cooper Power series surge capacitor offering which provides a cost-effective solution to absorb energy generated during surges events - lightning strikes, switching surges, equipment failures, etc.

(PDF 374 KB , 27/10/2020)

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Catalogues

EX-7Li and EX-7Fi single-phase internally fused medium-voltage capacitor units catalog

This catalog describes Eaton's Cooper Power series EX-7Li and EX-7Fi all-film internally fused capacitors featuring extended foil, solderless connections, CLEANBREAK element fusing system and both laser-cut and folded edge aluminum foil.

(PDF 140 KB , 01/08/2015)

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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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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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