RFI Attachment 1 - Pad Mounted Transformer Optional Features.pdf

Three-phase pad-mounted compartmental type transformer

General At Eaton, we are constantly striving to introduce new innovations to the transformer industry, bringing you the highest quality, most reliable transformers. Eaton’s Cooper Power series Transformer Products are ISO 9001 compliant, emphasizing process improvement in all phases of design, manufacture, and testing. In order to drive this innovation, we have invested both time and money in the Thomas A. Edison Technical Center, our premier research facility in Franksville, Wisconsin. Such revolutionary products as distribution-class UltraSIL™ Polymer-Housed Evolution™ surge arresters and Envirotemp™ FR3™ fluid have been developed at our Franksville lab.

With transformer sizes ranging from 45 kVA to 12 MVA and high voltages ranging from 2400 V to 46 kV, Eaton has you covered. From fabrication of the tanks and cabinets to winding of the cores and coils, to production of arresters, switches, tap changers, expulsion fuses, current limit fuses, bushings (live and dead) and molded rubber goods, Eaton does it all. Eaton’s Cooper Power series transformers are available with electrical grade mineral oil or Envirotemp™ FR3™ fluid, a less-flammable and bio-degradable fluid.

Electrical codes recognize the advantages of using Envirotemp™ FR3™ fluid both indoors and outdoors for fire sensitive applications. The bio-based fluid meets Occupational Safety and Health Administration (OSHA) and Section 450.23 NEC Requirements.

Three-Phase Transformers

CA202003EN

Effective July 2015 Supersedes 210-12 August 2013

COOPER POWER

SERIES

Figure 1. Three-phase pad-mounted compartmental type transformer.

LOW-

VOLTAGE

BUSHING

SUPPORT

SILL

Suitable for skidding, rolling, and jacking

5-position tap changer

Ground pad and strap for x0Parking stand

Liquid level gauge Nameplate laser-scribed anodized aluminum

Removable cabinet walls

Drip shield

Type Three Phase, 50 or 60 Hz, 65 ºC Rise (55 ºC, 55/65 ºC), 65/75 °C, 75 °C

Fluid Type Mineral oil or Envirotemp™ FR3™ fluid

Coil Configuration 2-winding or 4-winding or 3-winding (Low-High-Low), 3-winding (Low-Low-High)

Size 45 – 10,000 kVA

Primary Voltage 2,400 – 46,000 V

Secondary Voltage 208Y/120 V to 14,400 V

Specialty Designs

Inverter/Rectifier Bridge

K-Factor (up to K-19)

Vacuum Fault Interrupter (VFI)

UL® Listed & Labeled and Classified

Factory Mutual (FM) Approved®

Solar/Wind Designs

Differential Protection

Seismic Applications (including OSHPD)

Hardened Data Center

Table 1. Product Scope

Bay-O-Net fusing

LOW-VOLTAGE

BUSHING

Low-voltage molded epoxy bushings with NEMA® spades

LOADBREAK SWITCH

Catalog Data CA202003EN Effective July 2015

Three-phase pad-mounted compartmental type transformer www.eaton.com/cooperpowerseries

HIGH-VOLTAGE BUSHING

Table 4. Audible Sound Levels

Self-Cooled, Two Winding kVA Rating

NEMA® TR-1 Average

Decibels (dB)

45-500 56

501-700 57

701-1000 58

1001-1500 60

1501-2000 61

2001-2500 62

2501-3000 63

3001-4000 64

4001-5000 65

5001-6000 66

6001-7500 67

7501-10000 68

Table 6. Temperature Rise Ratings 0-3300 Feet (0-1000 meters)

Standard Optional

Unit Rating (Temperature Rise Winding) 65 ºC 55 °C, 55/65 ºC, 75 °C

Ambient Temperature Max 40 ºC 50 ºC

Ambient Temperature 24 Hour Average 30 ºC 40 ºC

Temperature Rise Hotspot 80 ºC 65 ºC

Table 2. Three-Phase Ratings

Three-Phase 50 or 60 Hz kVA Available1:

45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000, 2500, 3000, 3750, 5000, 7500, 10000 1Transformers are available in the standard ratings and configurations shown or can be customized to meet specific needs.

Table 3. Impedance Voltage

Rating (kVA)

Low-voltage rating

≤ 600 V 2400 Δ through 4800 Δ 6900 Δ through 13800GY/7970 or 13800 Δ

45-75 2.70-5.75 2.70-5.75 2.70-5.75 112.5-300 3.10-5.75 3.10-5.75 3.10-5.75 500 4.35-5.75 4.35-5.75 4.35-5.75 750-2500 5.75 5.75 5.75 3750 5.75 5.75 6.00 5000 6.00 6.50 otee:N The standard tolerance is ± 7.5%

Table 5. Insulation Test Levels

KV Class Induced Test 180 or 400 Hz 7200 Cycle kV BIL Distribution Applied Test 60 Hz (kV)

1.2

Twice Rated Voltage

30 10

2.5 45 15

5 60 19

8.7 75 26

15 95 34

25 125 40

34.5 150 50

Catalog Data CA202003EN Effective July 2015

Three-phase pad-mounted compartmental type transformer

D E

B

F

A*

I

C

F-3 H

G

PAD DIMENSIONS

3.5"

I-3

CABINET/TANK DIMENSIONS

Figure 2. Transformer and pad dimensions.

* Add 9" for Bay-O-Net fusing.

Table 8. Fluid-Filled—Copper Windings 55/65 °C Rise1

1 Weights, gallons of fluid, and dimensions are for reference only and not for construction. Please contact Eaton for exact dimensions.

* Add 9" for Bay-O-Net fusing.

65° Rise DEAD-FRONT—LOOP OR RADIAL FEED—BAY-O-NET FUSING OIL FILLED—COPPER WINDINGS kVA Rating OUTLINE DIMENSIONS (in.) Gallons of

Fluid Approx. Total Weight (lbs.)A* B C D E F G H I

45 50 64 39 34 30 64 69 43 20 110 2,100 75 50 64 39 34 30 64 69 43 20 115 2,350

112.5 50 64 49 34 30 64 69 53 20 115 2,500 150 50 64 49 34 30 64 69 53 20 120 2,700 225 50 64 51 34 30 64 73 55 20 140 3,250 300 50 64 51 34 30 64 75 55 20 160 3,800 500 50 81 53 34 30 64 85 57 20 200 4,800 750 64 89 57 42 30 72 93 61 20 255 6,500 1000 64 89 59 42 30 72 93 63 20 300 7,800 1500 73 89 86 42 30 72 93 90 24 410 10,300 2000 73 72 87 42 30 72 76 91 24 420 11,600 2500 73 72 99 42 30 72 76 103 24 500 14,000 3000 73 84 99 46 37 84 88 103 24 720 18,700 3750 84 85 108 47 38 85 88 112 24 800 20,500 5000 84 96 108 48 48 96 100 112 24 850 25,000 7500 94 102 122 54 48 102 100 126 24 1,620 46,900

Table 7. Fluid-filled—aluminum windings 55/65 °C Rise1

65° Rise DEAD-FRONT—LOOP OR RADIAL FEED—BAY-O-NET FUSING OIL FILLED—ALUMINUM WINDINGS kVA Rating OUTLINE DIMENSIONS (in.) Gallons of

Fluid Approx. Total Weight (lbs.)A* B C D E F G H I

45 50 68 39 42 26 68 72 43 20 110 2,100 75 50 68 39 42 26 68 72 43 20 115 2,250

112.5 50 68 49 42 26 68 72 53 20 120 2,350 150 50 68 49 42 26 68 72 53 20 125 2,700 225 50 72 51 42 30 72 76 55 20 140 3,150 300 50 72 51 42 30 72 76 55 20 160 3,650 500 50 89 53 42 30 72 93 57 20 190 4,650 750 64 89 57 42 30 72 93 61 20 270 6,500 1000 64 89 59 42 30 72 93 63 20 350 8,200 1500 73 89 86 42 30 72 93 90 24 410 10,300 2000 73 72 87 42 30 72 76 91 24 490 12,500 2500 73 72 99 42 30 72 76 103 24 530 14,500 3000 73 84 99 46 37 84 88 103 24 620 16,700 3750 84 85 108 47 38 85 88 112 24 660 19,300 5000 84 96 108 48 48 96 100 112 24 930 25,000 7500 94 102 122 54 48 102 100 126 24 1,580 41,900

1 Weights, gallons of fluid, and dimensions are for reference only and not for construction. Please contact Eaton for exact dimensions.

* Add 9" for Bay-O-Net fusing.

Catalog Data CA202003EN Effective July 2015

Standard features Connections and neutral configurations

• Delta - Wye: Low voltage neutral shall be a fully insulated X0 bushing with removable ground strap.

• Grounded Wye-Wye: High voltage neutral shall be internally tied to the low voltage neutral and brought out as the H0X0 bushing in the secondary compartment with a removable ground strap.

• Delta-Delta: Transformer shall be provided without a neutral bushing.

• Wye-Wye: High voltage neutral shall be brought out as the H0 bushing in the primary compartment and the low voltage neutral shall be brought as the X0- bushing in the secondary compartment.

• Wye-Delta: High voltage neutral shall be brought out as the H0 bushing in the primary compartment. No ground strap shall be provided (line to line rated fusing is required).

High and low voltage bushings

• 200 A bushing wells (15, 25, and 35 kV)

• 200 A, 35 kV Large Interface

• 600 A (15, 25, and 35 kV) Integral bushings (dead-front)

• Electrical-grade wet-process porcelain bushings (live-front)

Tank/cabinet features

• Bolted cover for tank access (45-2500 kVA)

• Welded cover with hand hole (>2500 kVA)

• Three-point latching door for security

• Removable sill for easy installation

• Lifting lugs (4)

• Stainless steel cabinet hinges and mounting studs

• Steel divider between HV and LV compartment

• 20” Deep cabinet (45-1000 kVA)

• 24” Deep cabinet (1500-7500 kVA)

• 30” Deep cabinet (34.5/19.92 kV)

• Pentahead captive bolt

• Stainless steel 1-hole ground pads (45-500 kVA)

• Stainless steel 2-hole ground pads (750-10,000 kVA)

• Parking Stands (dead-front)

Valves/plugs

• One-inch upper filling plug

• One-inch drain plug (45-500 kVA)

• One-inch combination drain valve with sampling device in low voltage compartment (750-10,000 kVA)

• Automatic pressure relief valve

Nameplate

• Laser-scribed anodized aluminum nameplate

Figure 3. Drain valve with sampler. Figure 4. Automatic Pressure relief valve. Figure 5. Liquid level gauge.

Figure 6. External Gauges. Figure 7. External visible break with gauges.

Catalog Data CA202003EN Effective July 2015

Optional features High and low voltage bushings

• 200 A (15, 25 kV) bushing inserts

• 200 A (15, 25 kV) feed thru inserts

• 200 A (15, 25 kV) (HTN) bushing wells with removable studs

• High-voltage 600 A (15, 25, 35 kV) deadbreak one-piece bushings

• Low voltage 6-, 8-holes spade

• Low voltage 12-, 16-, 20-holes spade (750-2500 kVA)

• Low voltage bushing supports

Tank/cabinet features

• Stainless steel tank base and cabinet

• Stainless steel tank base, cabinet sides and sill

• 100% stainless steel unit

• Service entrance (2 inch) in sill or cabinet side

• Touch-up paint (domestic)

• Copper ground bus bar

• Kirk-Key provisions

• Nitrogen blanket

• Bus duct cutout

Special designs

• Factory Mutual (FM)

• UL® Classified

• Triplex

• High altitude

• K-Factors

• Step-up

• Critical application

• Modulation transformers

• Seismic applications (including OSHPD)

Switches

• One, two, or three On/Off loadbreak switches

• 4-position loadbreak V-blade switch or T-blade switch

• Delta-wye switch

• 3-position V-Blade selector switch

• 100 A, 150 A, 300 A tap changers

• Dual voltage switch

• Visible break with VFI interrupter interlock

• External visible break (15, 25, and 35 kV, up to 3 MVA)

• External visible break with gauges (15, 25, and 35 kV, up to 3

MVA)

Gauges and devices

• Liquid level gauge (optional contacts)

• Pressure vacuum gauge (optional contacts and bleeder)

• Dial-type thermometer (optional alarm contacts)

• Cover mounted pressure relief device (optional alarm contacts)

• Ground connectors

• Hexhead captive bolt

• Molded case circuit breaker mounting provisions

• External gauges in padlockable box

Overcurrent protection

• Bay-O-Net fusing (Current sensing, dual sensing, dual element, high amperage overload)

• Bay-O-Net expulsion fuse in series with a partial range under-oil ELSP current limiting fuse (below 23 kV)

• Cartridge fusing in series with a partial range under-oil ELSP cur-rent limiting fuse (above 23 kV)

• MagneX™ interrupter with ELSP current-limiting fuse

• Vacuum Fault Interrupter (VFI)

• Visible break window

• Fuse/switch interlock

Valves/plugs

• Drain/sampling valve in high-voltage compartment

• Globe type upper fill valve

Overvoltage protection

• Distribution-, intermediate-, or station-class surge arresters

• Elbow arresters (for dead-front connections)

Metering/fan/control

• Full metering package

• Current Transformers (CTs)

• Metering Socket

• NEMA® 4 control box (optional stainless steel)

• NEMA® 7 control box (explosion proof)

• Fan Packages

Testing

• Customer test witness

• Customer final inspection

• Zero Sequence Impedance Test

• Heat Run Test

• ANSI® Impulse Test

• Audible Sound Level Test

• RIV (Corona) Test

• Dissolved Gas Analysis (DGA) Test

• 8- or 24-Hour Leak Test

Coatings (paint)

• ANSI® Bell Green

• ANSI® #61 Light Gray

• ANSI® #70 Sky Gray

• Special paint available per request

Nameplate

• Stainless steel nameplate

Decals and labels

• High voltage warning signs

• Mr. Ouch

• Bi-lingual warning

• DOE compliant

• Customer stock code

• Customer stenciling

• Shock and arc flash warning decal

• Non-PCB decal

Catalog Data CA202003EN Effective July 2015

Three-phase pad-mounted compartmental type transformer www.eaton.com/cooperpowerseries ztolf Highlight Switches

• One, two, or three On/Off loadbreak switches

• 4-position loadbreak V-blade switch or T-blade switch

Construction Core

The three-legged, step-lap mitered core construction is manufac-tured using a high-quality cutting machine. For maximum efficiency, cores are precisely stacked, virtually eliminating gaps in the corner joints.

Five-legged wound core or shell-type triplex designs are used for wye-wye connected transformers, and other special transformer designs.

Cores are manufactured with precision cut, burr-free, grain-oriented silicon steel. Many grades of core steel are available for optimizing core loss efficiency.

Coils

Pad-mounted transformers feature a rectangular coil configuration with wire-wound, high-voltage primaries and sheet-wound secondaries. The design minimizes axial stress developed by short circuits and provides for magnetic balancing of tap connections.

Coils are wound using the highest quality winding machines provid-ing exacting tension control and conductor placement for superior short-circuit strength and maximum efficiency.

Extra mechanical strength is provided by diamond pattern, epoxy-coated paper insulation, used throughout the coil, with additional epoxy at heavy stress points. The diamond pattern distribution of the epoxy and carefully arranged ducts, provide a network of passages through which cooling fluid can freely circulate.

Coil assemblies are heat-cured under calculated hydraulic pressure to ensure performance against short-circuit forces.

Core and coil assemblies

Pad-mounted transformer core and coil assemblies are braced with heavy steel ends to prevent the rectangular coil from distorting under short-circuit conditions. Plates are clamped in place using presses, and welded or bolted to form a solid core and coil assembly. Core and coil assemblies exceed ANSI® and IEEE® requirements for short-circuit performance. Due to the rigidity of the design, impedance shift after short-circuit is comparable to that of circular wound assemblies.

Tanks

Transformer tanks are designed for high strength and ease of handling, installation, and maintenance. Tanks are welded using precision-cut, hot rolled, pickled and oiled steel. They are sealed to protect the insulating fluid and other internal components.

Transformer tanks are pressure-tested to withstand 7 psig without permanent distortion and 15 psig without rupture.

Tank finish

An advanced multi-stage finishing process exceeds IEEE Std C57.12.28™-2014 standards. The eight-stage pre-treatment process assures coating adhesion and retards corrosion. It converts tank surfaces to a nonmetallic, water insoluble iron phosphate coating.

The paint method consists of two distinct layers of paint. The first is an epoxy primer (E-coat) layer which provides a barrier against moisture, salt and corrosives. The two-component urethane final coat seals and adds ultraviolet protection.

Vacuum processing

Transformers are dried and filled with filtered insulating fluid under vacuum, while secondary windings are energized. Coils are heated to drive out moisture, ensuring maximum penetration of fluid into the coil insulation system.

Insulating fluid

Eaton’s Cooper Power series transformers are available with electrical-grade mineral insulating oil or Envirotemp™ FR3™ fluid.

The highly refined fluids are tested and degassed to assure a chemically inert product with minimal acid ions. Special additives minimize oxygen absorption and inhibit oxidation. To ensure high dielectric strength, the fluid is re-tested for dryness and dielectric strength, refiltered, heated, dried, and stored under vacuum before being added to the completed transformer.

Eaton’s Cooper Power series transformers filled with Envirotemp™ FR3™ fluid enjoy unique fire safety, environmental, electrical, and chemical advantages, including insulation life extend-ing properties.

A bio-based, sustainable, natural ester dielectric coolant, Envirotemp™ FR3™ fluid quickly and thoroughly biodegrades in the environment and is non-toxic per acute aquatic and oral toxicity tests.

Building for Environmental and Economic Sustainability (BEES) total life cycle assessment software, utilized by the US Dept. of Commerce, reports its overall environmental performance impact score at 1/4th that reported for mineral oil. Envirotemp™ FR3™ fluid has also earned the EPA Environmental Technology Verification of transformer materials.

With a fire point of 360 °C, Envirotemp™ FR3™ fluid is FM Approved® and Underwriters Laboratories (UL®) Classified “Less- Flammable” per NEC® Article 450-23, fitting the definition of a Listed Product per NEC®.

Pad-mounted VFI transformer

Eaton’s Cooper Power series VFI transformer combines a conventional distribution transformer with the proven Vacuum Fault Interrupter (VFI). This combination provides both voltage transformation and transformer over current protection in one space saving and money saving package. The pad-mounted VFI transformer protects the transformer and provides proper coordination with upstream protective devices. When a transformer fault or overload condition occurs, the VFI breaker trips and isolates the transformer.

The three-phase VFI breaker has independent single-phase initiation, but is three-phase mechanically gang-tripped. A trip signal on any phase will open all three phases. This feature eliminates single-phas-ing of three phase loads. It also enables the VFI breaker to be used as a three-phase load break switch.

Due to the resettable characteristics of the VFI breaker, restoring three-phase service is faster and easier.

The sealed visible break window and switch is an option that can be installed to provide visible break contact. This feature provides enhanced safety and allows an operator to see if the loadbreak switch contacts are in an open or closed position before performing maintenance.

Figure 8. VFI transformer with visible break.

Catalog Data CA202003EN Effective July 2015

Envirotran™ FM Approved special protection transformer

Eaton’s Cooper Power series Envirotran™ transformer is FM Approved and suitable for indoor locations. Factory Mutual Research Corporation’s (FMRC) approval of the Envirotran transformer line makes it easy to comply with and verify compliance with Section 450.23, 2008 NEC, Less-Flammable Liquid-Filled Transformer Requirements for both indoor and outdoor locations.

Envirotran FM Approved transformers offer the user the benefit of a transformer that can be easily specified to comply with NEC, and makes FM Safety Data Sheet compliance simpler, while also providing maximum safety and flexibility for both indoor and outdoor installations.

Because the “FM Approved” logo is readily visible on the transformer and its nameplate, NEC compliance is now easily verifiable by the inspector.

Envirotran FM Approved transformers are manufactured under strict compliance with FMRC Standard 3990 and are filled with FM Approved Envirotemp™ FR3™ fluid, a fire-resistant dielectric coolant.

Special application transformers Data Center transformer

With focus rapidly shifting from simply maximizing uptime and supporting demand to improving energy utilization, the data center industry is continually looking for methods to increase its energy efficiency and reliability. Utilizing cutting edge technology, Eaton’s Cooper Power series Hardened Data Center (HDC) transformers are the solution. Designed with special attention given to surge protection, HDC liquid-filled transformers provide superior performance under the harshest electrical environments. Contrary to traditional dry-type units, HDC transformers provide unsurpassed reliability, overloadability, operational life, efficiency, thermal loading and installed footprint. These units have reliably served more than 100 MW of critical data center capacity for a total of more than 6,000,000 hours without any reported downtime caused by a thermal or short-circuit coil failure.

The top priority in data center operations is uninterrupted service.

Envirotran HDC transformers from Eaton, having substantially higher levels of insulation, are less susceptible to voltage surges. Eaton has experienced zero failures due to switching transients. The ANSI® and IEEE® standard impulse withstand ratings are higher for liquid-filled transformers, making them less susceptible to insulation failure.

The Envirotran HDC transformer provides ultimate protection by increasing the BIL rating one level higher than standard liquid-filled transformer ratings. The cooling system of liquid-filled transformers provides better protection from severe overloads—overloads that can lead to significant loss of life or failure.

Data center design typically includes multiple layers of redundancy, ensuring maximum uptime for the critical IT load. When best in class transformer manufacturing lead times are typically weeks, not days, an unexpected transformer failure will adversely affect the facility’s reliability and profitability. Therefore, the ability to determine the electrical and mechanical health of a transformer can reduce the probability of costly, unplanned downtime. Routine diagnostic tests, including key fluid properties and dissolved gas analysis (DGA), can help determine the health of a liquid-filled transformer.

Although sampling is not required for safe operation, it will provide the user with valuable information, leading to scheduled repair or replacement, and minimizing the duration and expense of an outage.

With a dry-type transformer, there is no reliable way to measure the health or likelihood of an impending failure.

Solar transformer

As a result of the increasing number of states that are adopting aggressive Renewable & Alternative Energy Portfolio Standards, the solar energy market is growing—nearly doubling year over year. Eaton, a key innovator and supplier in this expanding market, is proud to offer its Cooper Power series Envirotran transformers specifically designed for Solar Photovoltaic medium-voltage applications. Eaton is working with top solar photovoltaic developers, integrators and inverter manufacturers to evolve the industry and change the way we distribute power.

In accordance with this progressive stance, every Envirotran Solar transformer is filled with non-toxic, biodegradable Envirotemp™ FR3™ dielectric fluid, made from renewable seed oils. On top of its biodegradability, Envirotemp™ FR3™ fluid substantially extends the life of the transformer insulation, saving valuable resources. What better way to distribute green power than to use a green transformer. In fact, delaying conversion to Envirotran transformers places the burden of today’s environmental issues onto tomorrow’s generations. Eaton can help you create a customized transformer, based on site specific characteristics including:

temperature profile, site altitude, solar profile and required system life. Some of the benefits gained from this custom rating include:

• Reduction in core losses

• Improved payback on investment

• Reduction in footprint

• Improved fire safety

• Reduced environmental impact

For the solar photovoltaic industry, Eaton is offering standard step up transformers and dual secondary designs, including 4-winding, 3-winding (Low-High-Low) and 3-winding (Low-Low-High) designs.

Wind transformer

Eaton is offering custom designs for renewable energy power generation. Eaton manufactures its Cooper Power series Generator Step-Up (GSU) transformers for installation at the base of every wind turbine. Additionally, grounding transformers are available for wind power generation.

DOE efficiency

The United States Department of Energy (DOE) has mandated efficiency values for most liquid type, medium voltage transformers.

As a result, all applicable Eaton’s Cooper Power series transformers 2500 kVA and below conform to efficiency levels as specified in the DOE ruling “10 CFR Part 431 Energy Conservation Program”.

Underwriters Laboratories® (UL®) Listed and Labeled/ Classified

The Envirotran transformer from Eaton can be specified as UL® Listed & Labeled, and/or UL® Classified. Underwriters Laboratories (UL®) listing is a verification of the design and construction of the transformer to the ANSI® and IEEE® standards. UL® listing generally is the most efficient, cost-effective solution for complying with relevant state and local electrical codes. UL® Combination Classification/Listing is another way in which to comply with Section 450.23, 2008 NEC® requirements. This combines the UL® listed transformer with a UL® Classified Less-Flammable Liquid and complies with the use restrictions found within the liquid Classification.

Catalog Data CA202003EN Effective July 2015

K-Factor transformer

With a drastic increase in the use of ferromagnetic devices, arcing devices, and electric power converters, higher frequency loads have increased significantly. This harmonic loading has the potential to generate higher heat levels within a transformer’s windings and leads by as much as 300%. Harmonic loading has the potential to induce premature failure in standard-design distribution transformers.

In addition to standard UL® “K-Factor” ratings, transformers can be designed to customer-provided specifications detailing precise loading scenarios. Onsite measurements of magnitude and frequency, alongside harmonic analysis of the connected load can be performed by Eaton engineers or a third party consultant. These field measurements are used to determine exact customer needs and outline the transformer specifications.

Eaton will design harmonic-resistant transformers that will be subjected to the unique harmonic loads. These units are designed to maintain normal temperature rise under harmonic, full-load conditions. Standard UL® “K-Factor” designs can result in unnecessary costs when the “next-highest” K-Factor must be selected for a calculated design factor. To save the customer these unnecessary costs, Eaton can design the transformer to the specific harmonic spectrum used in the application. Eaton’s Cooper Power series K-factor transformers are filled with mineral oil or Envirotemp™ FR3™ fluid and enjoy the added benefits of dielectric cooling such as higher efficiencies than dry-type transformers.

Modulation transformer

Bundled with an Outboard Modulation Unit (OMU) and a Control and Receiving Unit (CRU), a Modulation Transformer Unit (MTU) is designed to remotely achieve two way communication.

The use of an MTU reduces travel time and expense versus tra-ditional meter reading performed by high voltage electricians.

Additionally, with MTU it is possible to manage and evaluate energy consumption data, providing reduced metering costs and fewer ten-ant complaints.

An MTU utilizes existing utility infrastructure, therefore eliminating the need to engineer and construct a dedicated communication network.

Inverter/rectifier bridge

Eaton complements its range of applications for transformers by offering dual winding designs. These designs are intended for connection to 12-pulse rectifier bridges.

Product attributes To set us apart from other transformer manufactures, Eaton includes the following guarantees with every three-phase pad-mounted transformer.

Engineered to order (ETO)

Providing the customer with a well developed, cost-effective solution is the number one priority at Eaton. Using customer specifications, Eaton will work with the customer from the beginning to the end to develop a solution to fit their needs. Whether it is application specific, site specific, or a uniquely specified unit, Eaton will provide transformers with the best in class value and performance, saving the customer time and money.

Made in the U.S.A.

Eaton’s three-phase pad-mounted transformers are produced right here in the United States of America. Our manufacturing facilities are positioned strategically for rapid shipment of products.

Furthermore, should the need arise, Eaton has a broad network of authorized service repair shops throughout the United States.

Superior paint performance

Protecting transformers from nature’s elements worldwide, Eaton’s E-coat system provides unrivaled transformer paint life, and exceeds IEEE Std C57.12.28™-2014 and IEEE Std C57.12.29™-2005 standards. In addition to the outside of the unit, each transformer receives a gray E-coat covering in the interior of the tank and cabinet, providing superior rust resistance and greater visibility during service.

If the wide range of standard paint selections does not suit the cus-tomer’s needs, Eaton will customize the paint color to meet their requirements.

Rectangular coil design

Eaton utilizes a rectangular coil design. This winding technique results in a smaller overall unit footprint as well as reducing the transformer weight. The smaller unit size does not hinder the transformer performance in the least. Units have proven short circuit withstand capabilities up to 10 MVA.

Testing Eaton performs routing testing on each transformer manufactured including the following tests:

• Insulation Power Factor: This test verifies that vacuum processing has thoroughly dried the insulation system to required limits.

• Ratio, Polarity, and Phase Relation: Assures correct winding ratios and tap voltages; checks insulation of HV and LV circuits. Checks entire insulation system to verify all live-to-ground clearances.

• Resistance: This test verifies the integrity of internal high-voltage and low-voltage connections; provides data for loss upgrade calculations.

• Routine Impulse Tests: The most severe test, simulating a lightning surge. Applies one reduced wave and one full wave to verify the BIL rating.

• Applied Potential: Applied to both high-voltage and low-voltage windings, this test stresses the entire insulation system to verify all live-to-ground clearances.

• Induced Potential: 3.46 times normal plus 1000 volts for reduced neutral designs.

• Loss Test: These design verification tests are conducted to assure that guaranteed loss values are met and that test values are

Figure 9. Modular transformer.

Catalog Data CA202003EN Effective July 2015 within design tolerances. Tests include no-load loss and excitation current along with impedance voltage and load loss.

• Leak Test: Pressurizing the tank to 7 psig assures a complete seal, with no weld or gasket leaks, to eliminate the possibility of moisture infiltration or fluid oxidation.

Design performance tests

The design performance tests include the following:

• Temperature Rise: Our automated heat run facility ensures that any design changes meet ANSI® and IEEE® temperature rise criteria.

• Audible Sound Level: Ensures compliance with NEMA® requirements.

• Lightning Impulse: To assure superior dielectric performance, this test consists of one reduced wave, two chopped waves and one full wave in sequence, precisely simulating the harshest conditions.

Thomas A Edison Research and Test Facility We are constantly striving to introduce new innovations to the transformer industry, bringing you the highest quality transformer for the lowest cost. Eaton’s Cooper Power series Transformer Products are ISO 9001 compliant, emphasizing process improvement in all phases of design, manufacture, and testing. We have invested millions of dollars in the Thomas A. Edison Technical Center, our premier research facility in Franksville, Wisconsin affirming our dedication to introducing new innovations and technologies to the transformer industry. This research facility is fully available for use by our customers to utilize our advanced electrical and chemical testing labs.

Catalog Data CA202003EN Effective July 2015

Catalog Data CA202003EN Effective July 2015

Eaton, Cooper Power, MagneX, UltraSIL, Evolution, and Envirotran are valuable trademarks of Eaton in the U.S. and other countries. You are not permitted to use these trademarks without the prior written consent of Eaton.

IEEE Std C57.12.28™-2005 and Std C57.12.29™-2005 standards are trademarks of the Institute of Electrical and Electronics Engineers, Inc., (IEEE). This publication is not endorsed or approved by the IEEE.

IEEE® is a registered trademark of the Institute of Electrical and Electronics Engineers, Inc.

ANSI® is a registered trademark of American National Standards Institute.

National Electrical Code® and NEC® are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA.

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Three-phase pad-mounted compartmental type transformer

Eaton 1000 Eaton Boulevard Cleveland, OH 44122 United States Eaton.com

Eaton’s Cooper Power Systems Division 2300 Badger Drive Waukesha, WI 53188 United States Eaton.com/cooperpowerseries

© 2015 Eaton All Rights Reserved Printed in USA Publication No. CA202003EN

Catalog Data CA202003EN Effective July 2015

For Eaton’s Cooper Power series three-phase transformer product information call 1-877-277-4636 or visit:

www.eaton.com/cooperpowerseries.