PG02200001U Power Xpert UX ENG - Moeller

Power Xpert ® UXIEC Medium Voltage switchgear• Tested to IEC 62271-20017.5 kV up to 50 kA - 3 s24 k V up to 25 kA - 3 s• Air insulated switchgear• Internal arc classified• LSC2B-PMUXSafe, reliable MV switchgear

AutomotivePoweringbusinessworldwideAerospaceEaton delivers the power inside hundreds of products thatare answering the demands of today’s fast changing world.We help our customers worldwide manage the powerthey need for buildings, aircraft, trucks, cars, machineryand entire businesses. And we do it in a way thatconsumes fewer resources.TruckHydraulicsNext generationtransportationEaton is driving thedevelopment of newtechnologies – from hybriddrivetrains and emission controlsystems to advanced enginecomponents – that reduce fuelconsumption and emissions intrucks and cars.Higher expectationsWe continue to expand ouraerospace solutions andservices to meet the needs ofnew aviation platforms,including the high-flying light jetand very light jet markets.Building on our strengthsOur hydraulics businesscombines localised service andsupport with an innovativeportfolio of fluid powersolutions to answer the needsof global infrastructure projects,including locks, canals anddams.Powering Greener Buildingsand BusinessesEaton’s Electrical Group is aleading provider of powerquality, distribution and controlsolutions that increase energyefficiency and improve powerquality, safety and reliability.Our solutions offer a growingportfolio of “green” productsand services, such as energyaudits and real-time energyconsumption monitoring.Eaton’s Uninterruptible PowerSupplies (UPS), variable-speeddrives and lighting controls helpconserve energy and increaseefficiency.Electrical Hydraulics2

MV switchgear technologyis in our DNAEaton Corporation is a worldwide leader in thedesign, manufacture, and sale of safe, reliableand high-performance medium voltage powerdistribution equipment in accordance with IEC,GB and ANSI standards.Eaton’s range ofSF6 free switchgearfor Medium VoltageComplete Global Medium Voltage Switchgear SolutionsEaton, a premier leader in designing and manufacturing powerdistribution and protection equipment in the electrical industry,offers a comprehensive range of medium voltage (MV) solutionsto meet the needs of virtually every application. From productsthat feature cutting-edge design that allow for easy access,maintenance and space savings, to arc-resistant products thatenhance safety, Eaton’s medium voltage solutions provide avariety of products for every need. Additionally, Eaton’s globalservice network provides maximum customer support in allregions of the world.As one of the few completely vertically integrated and diversifiedindustrial manufacturers in the world, Eaton designs not only MVassemblies, but also the key components that comprise the MVsolutions – from steel housing and circuit breaker compartmentsto vacuum interrupters, circuit breakers, bus systems and fuses.Eaton’s MV heritage, strengthened by acquisitions such asWestinghouse DCBU, Cutler Hammer, MEM and Holec, hasresulted in breakthrough MV technologies and numerousinternational patents over the years.Part of Eaton’s complete electrical PowerChain Solutions– which help businesses minimize risks while realizing greaterreliability, cost efficiencies, capital utilization and safety –Eaton’s medium voltage equipment meets all applicablestandards and certifications such as IEC, NEMA / ANSI, GB,UL, IEEE, KEMA and CSA.When it comes to medium voltage solutions, you can trust theone name with a long history of proven performance: Eaton.3

UXSafe, reliable MV switchgear with sustainability built-inInnovative in its design, originated from the Unitolefamily, field-proven over forty years of vacuum circuitbreaker production and fully third-party certified toIEC 62271-100 and IEC 62271-200, Eaton's new UX rangeof compact air insulated with drawable Medium Voltageswitchgear leads the industry in safety, reliability,performance and sustainability.Knowledge andunderstandingEaton has over 80 yearsexperience in the design,manufacture and application ofMedium Voltage switchgear.Being at the forefront oftechnological advances, wepioneered the use of vacuumtechnology 80 years ago andintroduced epoxy-resin insulationover 50 years ago. Eaton is stillcommitted to developing, inno -vating and improving - as wellas to reducing size and costs.Millions of our vacuum inter -rupters have been in operationin every type of environment inthe world, catering for thewidest range of applications.It is this know ledge, under -standing and experience thatmake Eaton the logical choicefor the safe control and protec -tion of distribution systems.UX is particularly suited toprovide control and protec tionfor cables, transformers,capacitors and motors usedacross many industries. In factUX excels anywhere thatmedium voltage power has tobe switched, controlled andprotected.Built to the highest qualitystandardsUX is designed and fully thirdpartytype-tested to the latestIEC 62271-200 standards, withfull segregation by earthedmetal partitions of all the majorcompartments, and is equippedwith Eaton's very latest range ofIEC vacuum circuit breakerstype W-VACi - which are fullythird-party type-tested inaccordance with IEC 62271-100.Using Eaton's state of the arttechnology and manufactured inaccordance with the highestquality standards, our engineershave integrated coretechnologies, such as circuitbreaker and mechanism design,vacuum technology, solidinsulation and electrical fieldcontrol to build a reliable andcompact system, which benefitfrom the best practicesincorporated in our currentmedium voltage range.A complete range of compact, environmentally-friendly switchgear up to 4000 AThe system, which comprises acomplete range up to 4000 A,uses only environmentallyfriendly technology andmaterials. UX is based onvacuum technology and airinsulation, and is therefore theperfect alternative toenvironmentally harmful SF6gas insulated switchgear.It is also produced with fullyrecyclable materials ensuringthat at the end of its life theproduct can be safely andefficiently recycled - providinga wholly sustainable solutionto medium voltage switchgearapplications.Some applications are:• Power distribution• Water and waste watertreatment• Mining• Commercial buildings• Industrial facilities• Oil and gas (on- and off-shore)• Marine• Airports and hospitals.4

World leading technology with safety built inCombining advanced technology with provenengineering excellence, the UX range provides thehighest safety and reliability standards withoutcompromising competitiveness.As pioneers in vacuum and arc-interruption technologies, furtherdeveloped over 40 years, Eaton has millions of vacuum interrupterssuccessfully operating in multiple applications worldwide; Eaton'slatest vacuum circuit breaker, the W-VACi, sits at the heart of UX.Fully type-tested to latest IEC standardsThe switchgear is type tested tothe latest IEC 62271-200 andhas third-party certification toprove internal arc containmentclassification of AFLR from25 kA for 1 second and up to40 kA for 1 second and 50 kAfor 0.5 second. This meansthere is minimal risk of harm topersonnel in the unlikely eventof an internal arc in the cablecompartment, vacuum circuitbreaker compartment or thebusbar compartment in anydirection: front, rear and sidesof the switchgear.Minimal costs duringservice due to:Low environmentalimpact• Robust maintenance-freedesign with minimumnumber of parts• W-VACi circuit breaker has along life of 20,000 operationswithout the need for activemaintenance.• Advanced vacuuminterrupter contact designsprevent hot spots, createless heat and minimiseelectrode erosion to yieldlonger life.• No SF6 pressure checksand specialised refillingproceduresLow end of life disposal costsdue to:• Vacuum switchingtechnology• Air insulation• Recycling or re-use of allmaterials possible• No special decommissioningprocedures necessaryUser friendly• Cable connection and userinterfaces for operation onthe same side of the unit• Multiple cables per phasewith standard compressionlug for ease of cableconnection• Secondary cable entry pointson both sides of the lowvoltage compartment topplate• Secondary cable wire wayruns complete over thelength of the switch gear tohelp with inter-unit wiring.• Secondary cable terminalspositioned at a goodreachable height within thelow voltage compartment• Clear and simple,straightforward operationpanels combined with anactive mimic diagramIncreasing global legislationconcerning the use of green -house gases such as SF6 gasand their related disposal costs,makes vacuum technology withits reliability, low maintenance,and low environmental impactthe choice for now and thefuture.As the world strives to reducethe amount of SF6 gas used inall applications there is aresponsibility on the users ofelectrical switchgear to find,where appropriate, alternativesto SF6 gas as an insulation andswitching medium. Air and solidinsulation switchgear systemsincorporating vacuum switchingtechnologies are a reliable, safeand economic alternative foruse in electrical systems below36 kV and therefore should beused instead of SF6 gasinsulated systems.Modern medium voltageswitchgear employing vacuumtechnology together with airand epoxy resin insulationprovides:• Minimum number of partsand components• No special requirements forthe end-of-life disposal ofthe switchgear• Environmentally-friendlymaterials used in the design• No use of SF6-gas forswitching and insulation(green switching)• No risk of damaging leaksof SF6 gas or of toxic byproducts• Energy-efficient productionand assembly, withenvironmentally friendlyenergy sources• Minimal number of transitionpoints in the primary designenables low energy lossduring operation• Only re-usable and/orrecyclable materials usedSafety, reliability andperformance• Compartments are protectedagainst penetration byobjects• Internal arc classification ofAFLR provides operatorsafety in the unlikely eventof an internal arc• Operation only possible withthe circuit breakercompartment door closed• Logical mechanical andelectrical interlocks preventmal-operation• Capacitive voltage detectionsystem for verification ofsafe isolation from supply• In the unlikely event ofvacuum interrupter failurethere is no damage topersonnel and no harmfulgases are emitted.• Vacuum interrupter contacterosion is negligible• Fully encapsulated vacuuminterrupters• Fewer moving parts in thepole unit versus other arcinterruption technologiesReliable and safe inoperation• Complete design third partycertified in accordance withIEC 62271-200• Internal arc fault tested inaccordance withIEC 62271- 200• Quality assurance inaccordance with ISO 9001• Separate compartments for;cable, vacuum circuit breakerand busbars• Integrated arc chamber• Routine testedLow lifetime costLow initial costs due to:• Compact footprint• Cable access from frontor rear• Cable entry from eithertop or bottom• Easy-access cablecompartment for ease ofcable connection• Integrated arc chamber• Back to wall configurationwith front cable access5

UX vacuum technology switchgear systemBasic designUX is modular in construction, ensuring that any panelcombination and rating can be applied on a system.In addition, there is no limit to the number of panels that can beused in an installation, as several sections can easily be connectedtogether. Because the panels can be quickly assembled andconnected, flexible commissioning of the switchgear is an addedbenefit.1Arc chamberThe integral arc-chamberevacuates the gassesassociated with an internal arc.Optional standard parts areavailable to extend the arcchamber; flanges and grilles areavailable to exhaust the gassesoutside the switchgear room.2Low voltage wire-wayfor inter panel wiringA fully segregated metal wirewayis mounted at the top ofeach switchgear panel thatconnects together to form acontinuous low voltage wirewaythat runs along the entirelength of the switchgear.235143Low voltagecompartment678910The compartment issegregated with earthed metalpartitions and has ample spacefor control and protectiondevices.116

superior safety, reliability and performance4Busbar compartment5Vacuum circuit breakercompartment6Automatic shutters7Circuit earth switchBusbars are totally enclosed intheir own earthed metalcompartment which vents intothe arc chamber. Fully insulatedalong their entire length, thebusbars are type tested forratings up to 4000 A, 50 kA for3 seconds. Epoxy mouldingssegregate switchgear sections.Fully segregated by earthedmetal partitions, with its ownpressure relief channel into thearc chamber, the compart mentprovides all the safetyinterlocking mechanismsrequired for safe and reliableoperation of the vacuum circuitbreaker. Manual operationbuttons allow for full operationof the vacuum circuit breakerfrom the front of theswitchgear with the door fullyclosed. The circuit breaker ismechanically interlocked withthe compartment door so thatthe door cannot be openeduntil the circuit breaker isswitched Off and racked outinto the Test position.Individually operated automaticearthed metal shutters for boththe Line (busbar) and Load(cable) connections can bepadlocked in the closedposition. When the breaker is inTest or Disconnect positionsthe shutters automatically closeto prevent accidental contactwith any live parts.The earth switch is operatedfrom the front of theswitchgear, with mechanicalindicators to show the switchposition. A window allows directviewing of the earth switchposition. The earth switch ismechanically inter locked withthe circuit breaker or contactortruck such that it can only beclosed when truck is in theTest/Disconnect position. Thecircuit earth switch can bemechanically interlocked withthe cable compartment door asan additional safety measure.8Current transformers9Voltage transformers10Cable terminations11Earth barCast resin CTs are provided asstandard in a wide range ofratings, with an option to uselow voltage tape-wound CTs inthe same location.The voltage transformers arefitted with withdrawableprimary fuses to provide fullisolation of the transformer.This arrangement is designedwith maximum user safety inmind.Ample cable terminationprovision is provided up to 9single core cables per phase toenter the bottom of theswitchgear and are terminatedwith compression lugs ontocopper tails provided in thebottom of each panel.An earth bar system is providedmaking connections to thestation earth easy andeffective. The earth bar systemhas been fault tested and runsvertically and horizontally withineach panel section and isconnected to the earth switch,when provided.7

Control and protection1Low voltage controland protectioncompartment7Electrical operationwith circuit breakerstatus indicator12345910678Clear to view panel with allcontrols and indications clearlyvisible and easy to operate.2Protection relayEaton has a range of preferredrelay options that can be fittedas standard. However, customerspecific protection relays fromany manufacturer can be fittedto the compartment door.3Mimic diagramEasy to understand mimicdiagram of each circuit.45Metering with phaseselector switchOption for an ammeter andphase selector switch.Option for voltmeter and phaseselector switch.Voltage detectionsystemBreaker Open/Closed statusindicator.Breaker Open/Closed commandswitch.Optional LED indication ofspring charge mechanism"Charged" status8Earth switch indicatorOptional LED indication of earthswitch Open/Closed status.9Viewing windowsThe circuit breaker compartmentdoor viewing window providesvisual indication of the positionof the circuit breaker indicating:• The status of the breaker• The status of the springchargedmechanismThe cable compartment doorviewing window allows visualindication of:• The status of the earth switch• Inspection of the cableconnections11Each circuit breaker panel canbe equipped with an optionalstandard three phase voltagedetection system for voltagedetection to IEC 61243-5. TheVDS is driven from a capacitivedivider fitted within theinsulators connected to thecable connection and showsthe operator if the connectedcable is live.10Manual circuitbreaker operationCircuit breaker Open and Closebuttons11Circuit breakerracking mechanism96Circuit breakerposition indicatorCircuit breaker racking In/OutmechanismBreaker position indicationshows the breaker in theConnected/Service orDisconnected/Test position.Clear distinct operator panel for user friendly operation8

Eaton core technologiesVacuum technology: safe, compact and reliableEaton's vacuum interruptersconsist of a ceramic cylinderthat houses fixed and movablecontacts. Movement of thecontact under vacuumconditions is performed bybellows. A shield surroundingthe contacts prevents theinsulators from becomingcontaminated by any metalvapour produced during currentinterruption. This shield alsoensures good voltage potentialdistribution over the insulator.A special feature of Eaton'svacuum interrupters is thecreation of a large number ofparallel arcs between thecontacts. This "diffusedischarge" is characterised byvery low arc voltage and shortarc times, resulting in verylow arc energy - so contactwear in a vacuum interrupteris negligible.Vacuum interrupters are main -tenance free and are certifiedup to 30,000 operation cycles.12 431. Bellows2. Bellows shield3. Ceramic insulators4. Movable contact5. Magnetic laminations5Solid insulation using cast-resin technologyCast-resin is a high-qualityprimary insulation material.By using cast-resin for solidinsulation, Eaton's designengineers can shape the partsspecifically for optimalinsulation, robust constructionand cooling purposes.With over 50 years ofexperience in the design andmanufacture of cast-resincomponents, Eaton hasdetermined that the bestsolution is to embed theconductors and vacuuminterrupters directly into themoulding to form a singleencapsulated pole unit (EPU).Features• High mechanical strength forimproved durability andmechanical life of the poleunit• Protected against adverseclimatic conditions andhumidity• Protected againstmechanical impact, shockand vibration• Provides high thermalconductivity for improvedtemperature rating• High electrical resistivity andcreepage current resistancefor improved insulation andcompact design9

Main componentsVacuum circuit breakerThe vacuum circuit breaker uses a simple and reliable, true twostep spring charged mechanism for operation of the vacuuminterrupters. The construction of the mechanical linkage betweenthe actuator and the drive rod of each of the three vacuuminterrupters is simple and effective.Features• Environmentally friendly vacuum interrupters totally encap -sulated within pole units constructed of solid epoxy resin• Mechanically and electrically trip-free stored energymechanism design• Integrated mechanical lever for manual charging operationwith pushbutton control• Spring charged indicator with contacts for remote indicationof spring status• Mechanical status indicator for Open/Closed• Auxiliary contacts for Open/Closed position• Position indicator for Connected/Test position within thecompartment• Auxiliary contacts for remote position indication• Mechanically interlocked with the compartment door• Mechanical interlock to ensure the breaker is in the openposition before it can be racked-in or racked-outBusbarsThe busbar system is constructed from high-quality hard drawncopper bars of standardised cross-section.Features• Busbar compartment runs over the entire length of theswitchboard• Individual panel segregation between sections of the busbarchamber• Constructed from high-quality hard-drawn copper of standarddimensions• Fully insulated over the entire length of the switchboard• Busbar chamber vents directly into the integral arc-chamber• Busbar ratings up to 4000 A• Busbar short circuit ratings up to 50 kA - 3 s10

ContactorFor motor starters, transformers and capacitor banks, the UXsystem is available with vacuum contactor trucks. Contactors for3.6 or 7.2 kV can be mounted on a truck together with fuses, andvoltage transformers. Surge arresters can also be mounted at thecable terminals. For motor control applications up to 7.2 kV, UXincorporates the Eaton range of SL contactors. For motor startersat 12 kV please contact Eaton.Features• Environmentally friendly vacuum interrupters• Ratings up to 400 amps at 6.6 kV• Capacitor switching up to 295 amps at 6.6 kV• Maximum interruption current of 8.5 kA• Fuse protected up to 50 kA• Electronic coil control for optimum control of the coil voltageand reduced watts loss means more efficient use of powerand lower heat generation• Electronic coil control allows for field selectable controlvoltages and drop out times• Up to 6 auxiliary contacts in any combination of NormallyOpen and Normally Closed configurations• Mechanical latch option is available with electrical unlatchsignal.• Long life with up to 1 million electrical operations and2.5 million mechanical operations with no maintenance oradjustment requiredEarth switchAll panels can be equipped with a cable earthing switch. The earthswitch is mechanically interlocked with the circuit breaker so thatthe earth switch can only be operated when the circuit breaker isopen, and withdrawn to the 'Disconnected/Test' position.Features• Fully fault-rated earth switch• Operated from the front of the panel• Auxiliary contacts for service/earthed positions• Mechanical position indicators• Mechanically and/or electrically interlocked with the vacuumcircuit breaker11

Safe and reliablein useProven experience and knowledge gained by Eatonover many years in the areas of cast-resin technology,vacuum technology, arc interruption and electricalfield control have been integrated in the design anddevelopment of UX - ensuring that the switchgear issafe and has high operational reliability throughout itslifetime.Internal Arc Classification (IAC) of AFLRWhile the integrity of theequipment to provide continuityof supply was a major designconsideration throughout itsdevelopment, the safety of theoperator has also been one ofthe most important criteria, witha number of reassuring featuresbuilt in.All of Eaton's medium voltagesystems, including UX, havebeen third party tested to allrelevant standards, and are inaccordance with IEC regulations.Eaton has always emphasisedthe need to design and createsafe switchgear for operators atall times.One of the biggest potentialthreats to operators is aninternal arc in the switchgear.The metal-clad design and therobust construction has enabledUX to success fully pass internalarcing test in accor dance withIEC 62271-200 in all threeprimary compart ments andprovides an IAC rating of up to40 kA for 1 second and 50 kAfor 0.5 second.IEC62271-200 defines the levelof protection to be provided inthe event of an internal arc faultbeing generated within theswitchgear. UX has been provenby independent third-party testto provide an IAC Classificationof IAC = AFLR.A = Protection for personnelF = Protection at the Front ofthe switchgearL = Protection at the Lateral(sides) of the switchgearR = Protection at the Rear of theswitchgearThe IEC standard requires thatan internal arc test is carried outin each of the power sections ofthe switchgear. In UX thismeans the cable compart ment,the vacuum circuit breakercompartment, and the mainbusbar compartment.The standard allows for eachtest to be conducted inindividual switchgear panels -meaning that three separatepanels can be used to prove theintegrity of the design.UX, however, has achievedIEC62271-200 with all threetests being conducted in thesame panel. It is an importantsafety feature and indication ofstrength that UX passed allthree required tests in the samepanel.The UX has the following IACratings:12 kV and 17.5 kV:25 kA - 1 s, 26.3 kA - 1 s,31.5 kA - 1 s, 40 kA - 1 s and50 kA - 0.5 s24 kV:25 kA - 1 sLoss of service continuity classificationIEC62271-200 describes theextent to which the switchgearand control gear are allowed toremain operational in caseaccess to a main compartmentis necessary.UX has the highest attainablelevel of Loss of ServiceContinuity of LSC2B.Category LSC2BThis form allows for maximumcontinuity of service of thesystem during access to thecompartments inside theswitchgear - meaning that themain switching device of eachfunctional unit of an LSC2Bswitchgear is fitted in its ownaccessible compartment.Maintenance may be performedon the main switching devicewithout de-energizing thecorresponding cable connectionor the main busbars. As aconsequence, in this exampleof LSC2B switchgear, aminimum of 3 compartmentsfor each functional unit isnecessary:• 1 for each main switchingdevice• 1 for components connectedto one side of a mainswitching device, forexample, feeder circuit• 1 for components connectedto the other side of the mainswitching device, forexample, busbarsSwitchgear is classified asLSC2B when it is possible andsafe to open the circuit breakercompartment when the cableand busbars are energised.Partition classificationIn addition to the IAC and theLSC classifications, IEC62271-200 defines the type ofpartitions required betweeneach panel and between eachfunctional unit within the panel.UX employs only earthed metalpartitions and therefore has thehighest level of partitionclassification of PM.UX switchgear is equipped withautomatic earthed metalshutters. Individually operatedshutters for both the Line(busbar) and Load (cable)connections can be padlockedin the closed position. Whenthe vacuum circuit breaker is inthe test or the disconnectpositions the shutters willautomatically close to preventaccidental contact with any liveparts. For testing purposes,special shutter lifters are usedto maintain the shutters in theopen position. Colour codedand labelled 'Busbar' and'Cable', the shutters are easilyidentified as Open or Closed.12

Routine testsIn addition to the third partycertified type testingprogramme to prove theintegrity of the UX design,Eaton conducts routine testson each vacuum interrupter,circuit breaker and switchgearpanel. At a minimum thesetests confirm compliance withthe relevant IEC standards;however customer specific testprocedures and witness oftests can be accommodated.To ensure quality, all processesare performed in accordancewith ISO 9001 - at every stageof production the components,circuit breakers and currenttransformers are inspected forcorrect functioning. When theentire installation has beenassembled, a thorough visualinspection is carried out,together with the requiredmechanical, functional andelectrical checks.Accessibility ofcompartmentsIEC62271-200 defines theaccessibility classification foreach of the power sections inthe switchgear. UX has thefollowing accessibilitydefinitions.• Busbar:tool-based/non-accessible• Circuit breaker:interlocked controlled• Cable:tool-based or option forinterlocked controlledIngress of foreignobjectsUX has an external protectiondegree of IP4X as per IEC 60529with an option of IP41 available.Internal ingress protection toIP2X is standard with an optionfor IP3X for more demandingapplications. Separationeliminates the penetration offoreign objects and reduces therisk of accidental contact withany live parts.Safety interlocksFor personnel safety UX is designed with anumber of comprehensive mechanical interlocksto prevent unsafe operation.• It is not possible to rack-in or rack-out a circuitbreaker unless it is in the Off or Open position.• It is not possible to close a circuit breakerunless the circuit breaker is in the Connectedor Test position.• The secondary socket can only bedisconnected with the circuit breaker in thetest position.• Closing the circuit breaker is only possible withthe secondary contacts connected.• It is not possible to close the earth switchwhen the circuit breaker is in the Connectedposition.• The door of the vacuum circuit breakercompartment can only be opened when thecircuit beaker is in the Disconnected / Testposition.• It is only possible to rack-in or rack-out thecircuit breaker when the circuit breaker door isclosed.13

SustainabilityEnvironmentally friendlyThe UX is designed tobe environmentallyfriendly throughout thelife-cycle: from production,during service and at theend-of-life.One of Eaton's key strategicinitiatives is to provideenvironmentally friendlyproducts. This requiresexamination of the total lifecycle,from design todecommissioning.The product life-cycle can bedivided into five main blocks.These blocks are• The design• Materials used• The assembly• The operational phase• The decommissioningEaton's production plants actentirely in accordance with therules and procedures of theISO 14001 environmentalcertificate during developmentand production processes.Environmentally friendly designMaterial selection and thenumber of parts that are usedto manufacture the UX arecritical to determining howenvironmentally friendly themanufacturing process is.Eaton selects its materials toensure that they have thelowest possible impact on theenvironment. It is essential thatthey are equally safe for people- not just during use, but at theend of service life too.Within UX and the W-VACicircuit breaker, a combination ofsolid (cast-resin) and air is usedas insulation. The cast-resintechnology, in combination withelectrical field calculations,provides a very compact,environmentally friendly designfor the circuit breaker and theswitchgear. Because theswitching medium - vacuum - isused, UX can be completelyrecycled at the end of its lifewithout any issues relating tosafety procedures, specialhandling or safe disposal.No use of SF6-gas for insulation or switchingFrom the very beginning Eatonmade a fundamental choice notto use SF6 as a switching andinsulation medium for mediumvoltage equipment - it is on thelist of greenhouse gasses in theKyoto protocol and is the mostpotent of the six maingreenhouse gasses, with aGlobal Warming Potential(GWP) of 23,000.Some medium voltageswitchgear systems useSF6 gas as the insulatingmedium. Leakage of SF6 gasfrom switchgear contributessignificantly to the threat of thegreenhouse effect andassociated climate change.They also require additionalsafety measures and specialhandling requirements at theend of life.Minimum service checkson siteUX is designed for a lifetime ofat least 30 years; therefore theenergy usage for maintenanceactivities during this long periodis minimal. Due to the greeninsulation and switching tech -nology, there is also no leakageof the harmful SF6 gas duringits lifetime and no need forperforming extra mainte nanceactivities on SF6 gas pressurechecks.Minimal energy lossduring operationThe number of electricalcontact or changeover pointswithin the UX system has beenkept to an absolute minimum.This reduces the potentialnumber of "hot spots" andprevents additional energy lossassociated with contactsurfaces.Energy efficient assemblyUX is produced in an energyefficient environment. Standardprocesses and materials areused in the design and requireno special handling or manu -facturing processes, thusreducing the amount of energyrequired to manufacture andassemble the switchgear.Efficient use of materialsBesides the energy sources,special focus is placed on theefficient use of material duringassembly. For example by usingadvanced nesting tools thesheet steel plates are cut withthe least amount of waste, andsimilar principles are followed inthe design and manufacture ofother product components.Re-use or recycling ofmaterialsAll materials within UX can bere-used or recycled. Becausethe UX uses no SF6 gas, thereis no possibility of leakage ofthis greenhouse gas duringdecommissioning theswitchgear.14

Low total cost ofownershipDesigned to provide at least 30 years of reliable servicethe UX design guarantees low overall cost of ownershipwhen considered over the lifetime of the switchgear.Life-time costs can be split into initial costs, costs incurred duringservice and finally, costs for disposal of the switchgear. All costsof ownership are influenced by different features of theswitchgear provided with no concession to quality and reliability.Low initial costsLow cost during serviceMinimal inspectionPanel dimensionsWith panel dimensions of600 mm, 800 mm and1000 mm with only 3 depthsof panel across all ratings of1320 mm, 1500 mm and1550 mm, UX is one of themost compact designs of airinsulated medium voltageswitchgear available today. Thecompact design of UX allowsfor smaller switchrooms to bebuild further reducing theoverall cost of installation.Flexible cable accessThe UX offers top and bottomcable entry with cable accessfrom either front or rear. If frontaccess is chosen it is possibleto mount the UX panels flushagainst the wall thus reducingfurther the space needed in thebuilding.Costs during service ofswitchgear can accumulate dueto damaged parts requiringreplacement, or by maintenancecycles set up for critical partsthat will not reach theirexpected lifetime without beingserviced.Keeping this in mind duringthe initial design of the UX, thefirst design steps undertakenwere to:• Minimise the number ofparts used in theconstruction• Design using industrystandard or readily availableraw materials• Prevent internal parts frombeing damaged during thelifetime of the unit.This robust construction, usingonly the minimum number ofparts, is based on our longexperience of buildingswitchgear. During productionof the panels, routine tests arecarried out by specialists, toensure that the panels achievethe quality that they aredesigned for.By designing a simple, modular,efficient, proven, low energyspring charged mechanismwith the fewest possiblenumber of parts for the vacuumcircuit breaker, the maintenancerequirements normallyassociated with this type ofmechanism is dramaticallyreduced.With proven reliability of up to20,000 operations the UniversalMechanism Assembly used inthe W-VACi breaker helps toprovide a virtually maintenancefreecircuit breaker.Vacuum interrupter designplays an important role in thereduction of maintenance.Eaton's vacuum interruptersemploy a 'diffuse discharge'design which practicallyeliminates contact wear.Coupled with the proven solidinsulation technology Eatonemploys in the manufacture ofthe encapsulated pole unit, theW-VACi range of vacuum circuitbreakers is considered virtuallymaintenance free.Switchgear that uses SF6 gasas an insulation medium has aninherent leakage rate. Tomaintain an adequate insulationlevel within this type ofswitchgear, the pressure of theSF6 gas present in theswitchgear tanks must bechecked and refilled on aregular basis during the unit'slifetime.With UX the extra costsinvolved in checking and main -taining the required insulationlevel are not incurred. Thecombination of vacuum inter -rupters for switching, cast-resintechnology and clean air as theinsulation medium, is environ -mentally friendly and maintainsthe same quality level duringthe complete lifetime of UX. Bynot using SF6 gas in UX, anowner is also not faced withthe admini stration costsinvolved in registering thenumber of kilograms of SF6 gasin the installation.Low disposal costUX switchgear has a typicallifetime of at least 30 years.Depending on the location ofthe installation, this lifetime canbe extended. If, for any reason,a decision is made not to usethe switchgear any further itcan be fully recycled.When decommissioned, theswitchgear can be dismantledand the different materials caneither be re-used or recycledwith total safety. Because noSF6 gas is used, decommis -sioning is a less complicated,more cost effective and anenvironmentally friendlyoperation. There are no specialprecautions, tools ordecommissioning methodsrequired.15

Flexibility in designEvery application of thistype of system is unique,so Eaton offers a widerange of different paneltypes and field versions.If, in due course, additionalcapacity in the form of morepanels is required, UX caneasily be extended to the rightor left with only minimaldisruption to the supply forfinal connection of the busbars.Eaton realises that customersoften have their ownrequirements with respect tothe use of protection andcontrol components withinswitchgear, so the need forspecific components was takeninto account during productdevelopment and resulted in abasic primary design thatenables customers to integratesecondary protection andcontrol components accordingto their own specificationrequirements.Range of voltagetransformersAll UX panels can be fittedwith cast-resin insulatedvoltage transformers, of therequested transformer ratioand class, for voltagemeasurement on the cableside, or on the busbar side.The standard configuration isfor a fixed voltage transformerwith withdrawable fuses -although an option for truckmounted withdrawable voltagetransformers is also available.Range of currenttransformersIn order to provide protectionand metering, the cast-resininsulated current transformersare housed in the fixed sectionnear the feeder cable terminals.All common transformer ratios,outputs, rated currents andclasses are possible. For highercurrent ratings above 2500 Acast-resin ring-type currenttransformers are used.It is also possible, as an option,to fit low voltages wire-woundcurrent transformers onto ascreened primary conductorinstead of the standard castresinblock or ring typetransformers.Smart Grids and substationautomationEquipment for remotecommunication betweenpanels or automation systemscan also be installed in the lowvoltage compartment, makingthe system the perfect solutionfor current and future SmartGrid applications.Protection and controlequipmentThe protection and controlequipment is located in acompletely separate lowvoltage compartment with itsown access door. There isspace on the door for a mimicdiagram and for mountingequipment such as protectionrelays, voltage detectionsystems, meters, etc.In case additional space isrequired, the low voltagecompartment can be extended.StandardsUX complies with the following international standardsIEC 62271-1 Common specificationsIEC 62271-100 Circuit breakers (E2, M2, C2)IEC 62271-102 Disconnectors and earthing switches (E2, M0)IEC 62271-200 Metal enclosed switchgear and controlgearIEC 60044-1 Current transformersIEC 60044-2 Voltage transformersIEC 60529 Degrees of protection (IP Code)IEC 61850 Communication networks and systems in substationsIEC 61243-5 Live working - voltage detectors - Part 5: voltage detecting systems16

Electrical DataSystem 12 kV 17.5 kV 24 kVRated voltage kV 12 17.5 24Lightning impulse withstand voltage kV 75 95 125Power frequency withstand voltage kV 28 38 50Rated frequency Hz 50/60 50/60 50/60Internal arc classAFLRLoss of service continuity categoryLSC2BPartition classPMEarthing circuit kA - s 25 - 3; 26.3 - 3; 31.5 - 3; 40 - 3; 50 - 1 20 - 3; 25 - 3Accessibility of compartmentsCircuit breaker compartmentInterlock-controlledBusbar compartmentTool-based/non-accessibleCable compartmentTool-based or Interlock-controlledExternal degree of protectionIP4X (IP41 as an option)Internal degree of protectionIP2X (IP3X as an option)InstallationIndoorTemperature classification °C -5 to +40Relative humidity (max) % 95Busbar systemRated normal current A 1250, 1600, 2000, 2500, 3150, 4000 (FC*) 1250, 2000, 2500Rated short-time withstand current kA - 3 s 25 / 26.3 / 31.5 / 40 / 50 20 / 25Rated peak withstand current kA/50 Hz 63 / 66 / 80 / 100 / 125 63 / 80kA/60 Hz 65 / / 82 / 104 / 130 65 / 82*) FC = Fan cooled.Circuit breaker ratingsRated normal current A 630, 1250, 2000, 2500, 3150, 4000 800, 1250, 2000, 2500Rated short-circuit breaking current kA 26.3 / 31.5 / 40 / 50 20 / 25Rated short-circuit making current kA 65 / 82 / 104 / 130 65 / 82Rated short-time withstand current kA - 3 s 26.3 / 31.5 / 40 / 50 20 / 25Single capacitor bank switching C2 A 400Multiple capacitor bank switching back to back C1 A 400ClassS1, E2, C1, C2Operating cycles at short-circuit current 100Auxiliary voltage V 110/120/127 Vac 50/60Hz,208/220/240 Vac 50/60Hz,24/48/60 Vdc,110/125 Vdc, 220/250 VdcMechanismRated operating sequence A O - 0.3s - CO - 15s - COO - 0.3s - CO - 180s - COClassM2Number of operations up to 20,000Number of operations interrupter up to 20,00017

Dimensions (mm)BA600 800 1000Panel width 600 mm 800 mm 1000 mm12 kV and 17.5 kVMax. rating 630 A / 1250 A 2000 A 3150 A / 4000 A (FC)Depth 1310 1310 / 1490* 1490Height (A) 2200 2200 2200Height including arc chamber (B) 2760 2760 276024 kVMax. rating 800 A / 1250 A 2000 A / 2500 ADepth 1570 1570Height (A) 2320 2320Height including arc chamber (B) 2870 2870*) 1500 mm for IAC classification ratings of 40 kA - 1 s and 50 kA - 0.5 s only.Weights (kg)Circuit breaker panelMax weight including circuit breaker12 kV and 17.5 kVUX17 25 kA 630 A 600 mm wide 860UX17 31.5 kA 1250 A 600 mm wide 880UX17 40 kA 2000 A 800 mm wide 1200UX17 50 kA 2000 A 800 mm wide 1230UX17 40 kA 3150 A 1000 mm wide 1650UX17 50 kA 3150 A 1000 mm wide 165024 kVUX24 20 kA 800A 800 mm wide 1460UX24 25 kA 1250 A 800 mm wide 1480UX24 25 kA 2000 A 1000 mm wide 1820UX24 25 kA 2500 A 1000 mm wide 182018

Product rangeThe UX product range isvery flexible and has avariety of circuit optionsthat enable almost alltypes of application tobe configured.The truck design is common forall the types enabling thereconfiguration of the panelwhile in service.For added configurationflexibility the Riser Panels canbe fitted on either the left orthe right side of theSectionaliser Panels. Also thewidth of the combination ofSectionaliser and Riser Panelsis kept to a minimum.Further flexibility is provided bythe Equipped Riser Paneloption. In this configuration anystandard equipment truck canbe fitted into the EquippedRiser, offering options forbusbar metering, earthing, anda disconnect truck.A wide range of additionaloptions are also available formounting within the mainprimary compartments. Thelow voltage control andprotection compartment alsooffers many options for controland indication.Panel configurationsVCB PanelContactor PanelRiser Panel LeftSectionaliser PanelSectionaliser PanelRiser Panel RightCellCellCellCellAuxiliary PanelEquipped Riser LeftSectionaliser PanelSectionaliser PanelEquipped Riser RightCellCellCellCellCellTruck configurationsCicuit Breaker Contactor Busbar Earthing Cable Earthing Disconnector WithdrawableVTWithdrawableVTFixed VTWithdrawable FusesCellCellCellCellCellCell19

Eaton’s Electrical Sector is aglobal leader in powerdistribution, power quality,control and automation, andmonitoring products. Whencombined with Eaton’s full-scaleengineering services, theseproducts provide customer -driven PowerChain solutionsto serve the power systemneeds of the data center,industrial, institutional, publicsector, utility, commercial,residential, IT, mission critical,alternative energy and OEMmarkets worldwide.PowerChain solutions helpenterprises achieve sustainableand competitive advantagesthrough proactive managementof the power system as astrategic, integrated assetthroughout its life cycle,resulting in enhanced safety,greater reliability and energyefficiency. For more information,visit www.eaton.com/electrical.Eaton medium voltage products in the energy chainPower plantsMining2 3 4 5 6Infrastructure2 3 4 5 6Green energy1 2 3Offshore andmarine 4 5Commercial buildings1 2 3 4 5Heavy industry4 5 6Mainstations3 4 5 6Distributionsubstations3 4 5 6Shops andofficesTransformerstations 1 2ResidentialapplicationsPower generationProcessindustry2 3 4 5 6Industry1 2 3 4 5 6Green energy1 2Solutions andServices1 Magnefix2Xiria3SVS4Power Xpert ® FMX5 Power Xpert ® UX 6 MMSEaton Industries (Netherlands) B.V.P.O. Box 237550 AA HengeloThe NetherlandsTel.: +31 (0)74 - 246 40 10Fax: +31 (0)74 - 246 40 25holec-info@eaton.comwww.eatonelectric.com© 2011 Eaton CorporationAll rights reserved.Form No. PG02200001U / 6057952April 2011The information provided in this documentreflects the general characteristics of thereferenced products at the time of issue andmay not reflect their future characteristics.Eaton Corporation reserves the right tomodify the contents of this document andthe characteristics of the referencedproducts without prior notification.Eaton Corporation does not assume liabilityfor potential errors or omission of informationin this document.