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Heat pipe technologyHeat exits the heat pipeat the condenser (fin stack)where the working fluidcondenses through andreleases its latent heatthrough vaporization.

Heat enters the pipe at theevaporator (block) throughthe semiconductor deviceswhere it causes workingfluid to vaporize. Thevaporized fluid creates apressure gradient, whichforces the vapor towardthe condenser (fin stack).

Epoxy coated pipes

for protection inharsh environments.

HEAT

OUT

H

O

HEAT

IN

HEAT

IN

The capillary lining servesas a pump using capillarypressure to return the fluidfrom the condenser (finstack) to the evaporator(block). The capillary liningalso acts as an extendedsurface to allow higherheat fluxes.

Sealed Copper Heat Pipe(uncoated)

Vapor

FluidReturn

Condenser Area

Evaporator Area

The SC9000EP technology

Heat pipe technology usedto cool power components

Encapsulated medium voltacomponents, creating a harenvironment inverter

Roll-in/roll-out inverter desigminimizes downtime

SC9000 EPMedium voltage adjustable frequency drive

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Eaton is a registered trademark.

All other trademarks are propertyof their respective owners.

Eaton1000 Eaton BoulevardCleveland, OH 44122United StatesEaton.com

2014 EatonAll Rights ReservedPrinted in USAPublication No. SA02000001E / Z15346June 2014

Q: What is heat pipetechnology and howdoes it work?

A: Heat pipe technology allowsfor efficient and fast transferof heat from active heat-generating elements tocondenser elements in anelectrical system. The heat

pipe uses a self-contained,constant flow of fluid fromthe heat-generating elementsto the condenser elements.Fluid in the heat pipevaporizes due to the heatin the active elements, andcapillary pressure returns thecooled fluid toward the partof the heat pipe that containsthe active element.

Q: Why would I needthis technology?

A: The heat pipe cooling

method is the mostefficient air-cooled thermalmanagement systemavailable today. It is up to10 times more efficientthan conventional air-cooledmethods. Consequently, lessairflow is necessary, reducingaudible noise and levels ofcontaminants pulled intoelectrical cabinets.

Q: How does heat pipetechnology integrateinto products?

A: The heat pipe connectsthe active elements of asystem to the condenserelements. Heat enters pipesat the evaporator block(through semiconductordevices), where it causesworking fluid to vaporize.The vaporized fluid createsa pressure gradient andforces the vapor toward thecondenser (fin stack). Heatexits the heat pipe at thecondenser (fin stack) wherethe working fluid condensesand releases its latent

heat of vaporization. Thecondensed working fluid isdrawn down into the poresof the capillary lining andreturns to the evaporator.

Q: Is heat pipe technologysafe in cold climates?

A: Yes. A third-party testinglab performed temperaturetesting on the heat pipeexchangers at 50 Cfor 24 hours, in order tosimulate harsh transportationtemperatures. The lab reports

that: Cold storage at 50 Chas no influence on thestructure of the [heat pipe]unit. No defects were found.

Q: If a heat pipe getsdamaged, willperformance beaffected?

A: It is nearly impossibleto damage a heat pipeduring normal handlingand operation. If one doesleak, performance will notbe affected in most cases.

However, contact yourEaton service center ifa leak is noticed.

About heat pipe technology

For more information on Eaton medium

voltage adjustable frequency drives, visit

Eaton.com/SC9000or call1-877-ETN-CARE, option 2, then option 7