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 (SD, HD, XDC, XDB, XDH, Wildfire Mitigation) or internally fused units
Available with units mounted vertically, horizontally or flat, based on installation conditions
Robust lightweight welded aluminum frame (galvanized 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

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.

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, horizontal or flat 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.

Specifications

Ratings

Per Capacitor Unit (kvar)	50-700 (Externally Fused) 50-1000 (Fuseless) 200-1200 (Internally Fused)
Basic Insulation Level (BIL)	75-200 kV
Quantity of capacitors per frame structure	4-36 (typical)
System Voltage (kV L-L)	Up to 800
Bank (Mvar)	1-100 (typical)

Standards

IEEE Standards	Std. 18
IEC Standards	60871-1
CSA	CAN/CSA-C871-1

Structure details

Bank frame

6061-T6 aluminum

Galvanized steel (optional)

Elevating structure

6061-T6 aluminum

Galvanized steel (optional)

Application details

Bank type

Externally fused

Fuseless

Internally fused

Bank connection

Ungrounded Wye

Grounded Wye

Delta

Single-Phase

Bank configuration

Single Wye

Double Wye

"H" Bridge

Differential

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 , 01/24/2023)
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 , 02/11/2020)
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)
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 , 04/17/2020)
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 , 07/31/2020)

Catalogs

Capacitor blocks banks and accessories catalog

This catalog describes Eaton’s Cooper Power series capacitor block banks which can supply small or large Kvar requirements wherever the need exists

(PDF 5 MB , 09/01/2015)
Capacitor expulsion fuse catalog

This catalog describes Eaton's Cooper Power series bus-mounted expulsion type capacitor fuse which provides highly reliable, economical protection for capacitor banks where medium-energy-interrupting ability is required.

(PDF 156 KB , 04/28/2023)
Capacitor standard and OEM accessories catalog

This catalog describes the variety of Cooper Power series accessories that Eaton offers to increase the reliability and availability of power capacitor installations.

(PDF 2 MB , 09/01/2015)
Fuseless capacitor banks catalog

This catalog describes Eaton's Cooper Power series fuseless capacitor banks featuring standard-duty (SD), heavy-duty (HD) and extreme-duty (XD) all-film capacitors.

(PDF 351 KB , 08/01/2015)

Installation instructions

Expulsion fuse installation instructions

This document describes instructions for installing Eaton’s Cooper Power series expulsion fuses.

(PDF 1 MB , 11/01/2016)
Externally fused block banks installation instructions

This document describes instructions for installing Eaton’s Cooper Power series externally fused block banks.

(PDF 965 KB , 11/01/2016)
Fuseless block banks installation instructions

This document describes instructions for the installing Eaton’s Cooper Power series capacitor blocks on substation banks.

(PDF 1 MB , 11/01/2016)
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 , 11/30/2016)

Product specification guides

Medium-voltage power capacitor specification

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

(DOCX 290 KB , 06/04/2020)

Sales notes

Open air capacitor bank ordering guide

This form guides the user through ordering Eaton's Cooper Power series open air capacitor bank.

(PDF 321 KB , 09/28/2018)

Technical data sheets

Calculation of inrush currents in single- and multi-step capacitor bank installations

This document provides formulas that provide an accepted analytic approach for estimating the transient currents expected during capacitor switching.

(PDF 1 MB , 11/01/2016)

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 , 09/21/2021)
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 , 04/09/2019)
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 , 11/24/2020)

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Technical support

Open air capacitor banks