3WT Air Circuit Breakers Up To 4000 A - Siemens
Siemens AG 2019SENTRON3WT Air Circuit Breakersup to 4000 ACatalogLV 35Edition2019siemens.com/lowvoltage
Siemens AG 2019Related catalogsCatalog PDF / ContactLow-Voltage Power Distribution andLV 10Electrical Installation TechnologySENTRON SIVACON ALPHAProtection, Switching, Measuring and MonitoringDevices, Switchboards and Distribution SystemsCatalog PDFDigital versions of the catalogs are available inthe Siemens Industry Online Support.www.siemens.com/lowvoltage/catalogsPDF (E86060-K8280-A101-A8-7600)Print (E86060-K8280-A101-A6-7600)Air Circuit Breakers and Molded CaseCircuit Breakers with UL CertificationSENTRONLV 18PDF (E86060-K8280-E347-A1-7600)Industrial ControlsSIRIUSwww.siemens.com/automation-contactIC 10PDF (E86060-K1010-A101-A9-7600)Industrial CommunicationSIMATIC NETIndustry Mall / TIA ST / CA 01IK PIE86060-K6710-A101-B8-7600DELTASwitches and Socket OutletsContactYour personal contact can be found in ourContacts Database at:Industry MallInformation and Ordering Platformon the Internet:www.siemens.com/industrymallET D1Siemens TIA Selection Toolfor the selection, configuration and ordering ofTIA products and devicesPDFwww.siemens.com/tstSITRAINTraining for IndustryProducts for Automation and DrivesInteractive com/ca01downloadTrademarksTechnical SupportAll product designations may be registered trademarks orproduct names of Siemens AG or other supplying companies.Third parties using these trademarks or product names for theirown purposes may infringe upon the rights of the trademarkowners. Further information about low-voltage power distribution and electrical installation technology is available on theInternet at:www.siemens.com/lowvoltageSiemens LV 35 · 2019CA 01Expert advice on technical questions with awide range of demand-optimized servicesfor all our products and systems.www.siemens.com/lowvoltage/support-request
Siemens AG 20193WT Air Circuit Breakers up to 4000 ASENTRONCatalog LV 35 · 2019Supersedes:Catalog LV 35 · 2017Please contact your local Siemens branch. Siemens AG 2019Introduction13WT Air Circuit Breakers up to 4000 A (AC)2Appendix3
Siemens AG 2019As a source of energy for industry,buildings and infrastructures, the reliabilityof the power supply is becoming ever moreimportant. Only a flexible power supplytailored to every individual scenario canmeet all individual challenges, while at thesame time increasing availability andprofitability.2Siemens LV 35 · 2019Totally Integrated Power (TIP) fromSiemens is a holistic, customizable powersupply solution comprising software andhardware products, systems and solutionsacross all voltage levels. The systems andproducts of the TIP portfolio can be integrated seamlessly into industrial andbuilding automation systems. TIP enablescompanies to focus on their core businessand simultaneously ensure a reliable,secure and efficient supply of power.Because "power matters".
Siemens AG 2019Electrical power distribution –integrated, safe and efficientThe increasing level of automation in buildings and industry introduces novelrequirements for electrical power distribution and makes the underlying technologiesever more complex. Our components and systems are perfect for integration intonetworked environments, and they significantly contribute toward increasing theefficiency of your business processes. Communication-capable, flexible and fail-safedevices combine with digital engineering to provide you with optimized solutions –for any application.Comprehensive portfolioSimplified engineeringOur products lay the foundations for safe,reliable and efficient electrical infrastructure at medium and low-voltage levels inbuildings, infrastructure and industrialapplications. Our portfolio includes, amongother devices, power distribution boardsand distribution boards, communicationcapable protection, switching, measuringand monitoring devices, as well as switchesand socket outlets. Our tested and certifiedcomponents, systems and software packages allow for ever-suitable solutions inboth centralized and distributed power systems the world over. They reliably protectagainst accidents, faults and fires caused byelectrical installations and allow consumers to utilize electrical power in a sustainable, responsible manner.We support you throughout the entirevalue chain – from the planning stage,during installation and right through tooperation, as well as when it comes to measures for modernizing and expanding yourelectrical power distribution systems. Youbenefit from a broad portfolio ofpersonalized and online-based maintenance and support services. Professionalsoftware and data ensure simple planningin compliance with standards as well aserror-free configuration and documentation. Clear ordering channels, transparentproduct availability data and high deliveryreliability coupled with swift global sparepart provision, comprehensive onlineservices, expert consulting and fast,efficient and reliable processes ensure thatyou are optimally covered throughout theentire product life cycle.Siemens LV 35 · 20193
Siemens AG 2019Notes4Siemens LV 35 · 2019
1 Siemens AG 2019Introduction1/23WT air bircuit breakersFor further technicalproduct information:Siemens Industry Online Support:www.siemens.com/lowvoltage/product-support Entry type:Application roduct noteSoftware archiveTechnical dataSiemens LV 35 · 2019
Siemens AG 2019Introduction13WT air circuit breakers OverviewI201 19782374651Main connection, phase barrier5Door sealing frame, locks2Arc chute cover6Electronic trip unit (ETU), metering3Auxiliary conductor plug-in system7Closing solenoid, auxiliary trip unit4Guide frame, shutter, position indicator switch8External accessory1/2Siemens LV 35 · 2019158
Siemens AG 2019Introduction3WT air circuit breakers BenefitsFlexibility Electronic trip units (ETU) with outstanding features Only two frame sizes cover a broad range of applications from400 A to 4000 A, with a breaking capacity up to 66 kA up to690 V, 3- or 4-pole version, fixed-mounted, withdrawable version Modbus RTU communication Metering with internal voltage tap All components can be combined in a modular wayEase of use User friendliness in planning, configuration, installation andoperation Wide range of accessories for both frame sizes can be easilyretrofitted Displays for all electronic trip units (ETU)Safety and reliability International and standardized processes ensure highestproduct quality Conforms to international standards and approvalsSiemens LV 35 · 20191/31
Siemens AG 2019Introduction1Notes1/4Siemens LV 35 · 2019
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)22/2General data2/173- and 4-pole, withdrawable versioninclusive standard accessories2/183- and 4-pole, fixed-mounted versioninclusive standard accessories2/193- and 4-pole, withdrawable version2/223- and 4-pole, fixed-mounted version2/23Non-automatic air circuit-breakers,3- and 4-pole, withdrawable version2/24Non-automatic air circuit-breakers,3- and 4-pole, fixed-mounted version2/25Options2/32Accessories/spare parts2/36Project planning aidsNEWNEWFor further technicalproduct information:Siemens Industry Online Support:www.siemens.com/lowvoltage/product-support Entry type:Application roduct noteSoftware archiveTechnical dataSiemens LV 35 · 2019
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)General data Overview 6( B 1 3WT circuit breaker, withdrawable version, size II, 3-pole Withdrawable circuit breaker% Indication and reset button aftertripping for– tripped signaling switch and– manual reset reclosing lockout& Stored-energy indicator( Switching position indicator) Ready-to-close indicator* ,./013WT circuit breaker, fixed-mounted version, size II, 3-poleON button, mechanicalOFF button, mechanicalIndication of circuit breaker positionGuide frameGuide railsAuxiliary circuit plug-in systemCrank holeHand leverI201 197522 Motorized operating mechanism2/2Siemens LV 35 · 2019Electronic trip unit
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)General data BenefitsSafety and reliability High degree of protection with door sealing frame in the caseof exclusively local operation of the circuit breaker Infeed supply from above or below, as required Locking of the withdrawable circuit breaker against moving,as standard Locking of the guide frame with the circuit breaker removed,as standard Signaling switch for overload and short-circuit tripping withmechanical reclosing lockout High degree of protection with cover IP55 Mechanical reclosing lockout after overload or short-circuittripping as standard The circuit breaker is always equipped with the required number of auxiliary supply connectorsEasy to operate Unambiguous ON-OFF indicator with auxiliary switch for signal Ready-to-close indicator with signaling switch as safetystandard.ModularMany components, such as auxiliary releases, motorized operating mechanisms, electronic trip units and current transformerscan be replaced or retrofitted to adapt the circuit breaker tochanging requirements.Minimal power loss and therefore low energy consumptionThe low power consumption of the electrical components alsosaves money when it comes to purchasing the control-powertransformers. Where space is at a premium or ventilation islimited. ApplicationIEC 60947-2,GB 14048.2,CCC approval,climate-proof to IEC 60068-2-30, IEC 60068-2-6, FcOperating conditionsThe 3WT circuit breakers are climate-proof in accordance withIEC 60068-2-30, IEC 60068-2-6, Fc.They are intended for use in enclosed areas where no severe operating conditions (e.g. dust, corrosive vapors, damaginggases) are present.When installed in dusty or damp areas, suitable enclosures mustbe provided. If damaging gases (e.g. hydrogen sulfide) arepresent in the surrounding air, sufficient incoming fresh air mustbe supplied. DesignVersionsBreaking capacity: 55/66kA at 500V/690VRated current: from 400 A to 4000 ARated operating voltage: up to AC 690VThe 3WT circuit breakers are supplied complete with an operating mechanism, electronic trip unit and auxiliary switches andare fitted with auxiliary releases.The non-automatic circuit breakers are supplied without electronic trip unitStandard version Electronic trip unit with LSI protection, LCD display with backlight, LEDs for the cause of tripping, LED status indicator,query and test button Auxiliary supply connector: The circuit breaker is equippedwith the required number of connectors Mechanical ON and OFF pushbutton Door sealing frame IP41 Tripped signaling switch (1 NO) Ready-to-close indicator with signaling switch Stored-energy indicator Auxiliary switches (2NO 2NC) Rear horizontal main circuit connections for fixed mountedand withdrawable versions For 4-pole circuit breakers, the fourth pole (N) is installed onthe left and is 100 % loadable Indication and reset button after tripping for- tripped signaling switch and- mechanical reclosing lockout User manual in al features of the withdrawable version: Main contacts:Laminated receptacles in the guide frame, penetration bladeson the withdrawable circuit breaker Position indicator in the control panel of the withdrawable circuit breaker Guide frame with guide rails for easy moving of the withdrawable circuit breaker The withdrawable circuit breaker can be locked to prevent itbeing pushed out of positionStandard version for non-automatic circuit breaker Same features as the circuit breaker, see "Standard version"but No electronic trip unitThe permissible ambient temperatures and the associated ratedcurrents are listed in the technical specifications.Siemens LV 35 · 20192/32
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)General data FunctionOperating mechanisms(see illustration "Motorized operating mechanism")2The circuit breakers are available with various optional operatingmechanisms: Manual operating mechanism with memory, with mechanicalclosing Manual operating mechanism with mechanical and electricalclosing Motorized operating mechanism that can also be operatedmanually, with mechanical and electrical closing.The operating mechanisms with electrical closing can be usedfor synchronization tasks.EMERGENCY-STOP facilityThe 3WT circuit breakers can be used as an EMERGENCY-STOPfacility to IEC 60204-1 if the circuit breaker is equipped with anundervoltage release and is used in conjunction with anEMERGENCY-STOP control device.Auxiliary and signaling switches Ready-to-closeIf all the conditions are fulfilled, so that the circuit breaker isready to close, this is indicated visually on the operator panel. The circuit breakers are supplied with 2 NO and 2 NC contactsor with 2 NO and 2 NC and 2 CO contacts or 4 NO and 4 NCcontacts or 5 NO and 3 NC or 6 NO and 2 NC contactsaccording to order. "Tripped" signaling switch and mechanical reclosing lockoutAs standard, the circuit breaker is equipped with an S11 signaling switch and a mechanical reclosing lockout for the common overload and short-circuit signal and, depending on thesetting and version of the electronic trip unit, the ground-faultsignal.The tripped signal and the standard mechanical mechanismto prevent closing remain active until the reset button is operated on the circuit breaker. When the circuit breaker hastripped, this is indicated by the protruding reset button.The electrical signal from the „tripped“ switch S11 has to bereset by operating the Reset button.Auxiliary supply connectionsThe type of connection for the auxiliary switches depends on thetype of installation: Withdrawable version:The internal auxiliary switches are connected to the male connector on the circuit breaker side. When fully inserted, theconnector makes a connection with the sliding module in theguide frame. Fixed mounting:In this case the auxiliary supply connectors are engaged directly onto the circuit breaker.2/4Siemens LV 35 · 2019Fixed-mounted and withdrawable versionFixed-mounted and withdrawable circuit breakers Protective measures against arcing gasesFor 3WT circuit breakers with voltages up to AC 690 V,screening from vertical busbars is not necessary.Electrical add-on devices on the side of the circuit breakermust be separately covered. Also see notes under "Projectplanning aids", "Dimensional drawings". Operator panelThe operator panel is designed to protrude from a cutout in thedoor providing access to all operator controls and displayswith the door closed.The operator panels for all circuit breakers (fixedmounted/withdrawable versions, 3-pole, 4-pole) are identical.The operator panel ensures degree of protection IP41. Door sealing frameThe door sealing frame seals the cabinet door with the operator panel. With the cabinet door closed, the IP degree of protection is achieved for the circuit breaker.Withdrawable circuit breakerThe withdrawable version comprises a withdrawable circuitbreaker, a guide frame and a hand crank for moving the withdrawable circuit breaker. The guide frames are fitted with guiderails as standard for easy handling of the withdrawable circuitbreaker. Auxiliary supply connectionsThe auxiliary supply connections make contact automaticallywhen the circuit breaker slides into the guide frame (test position, connected position). Circuit breaker positions in the guide frameThe withdrawable version has three switch positions in theswitchgear cabinet behind the cabinet door:- Connected position(main circuit and auxiliary circuit ready)- Test position(main circuit disconnected, auxiliary circuit ready)- Disconnected position(main circuit and auxiliary circuit disconnected)In the disconnected position, the withdrawable circuit breakercomplies with the "protective separation condition" with a visibleisolating distance in the main circuit and auxiliary circuit.The circuit breaker must always be switched off before it ismoved. The "OFF" button must be held down when the slide inthe crank hole is opened.
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)General dataGuide framesFixed-mounted circuit breakersThe following options are available, with combinations of top andbottom connections possible: Accessible from the front, double hole (holes according toDIN 43673) (for vertically installed busbars) At the rear, vertical (for vertically installed busbars)NSE0 00967bNSE0 02094aVerticalconnectionWithdrawable circuit breaker, withdrawable guide frameHorizontalconnectionNSE0 00972bAll circuit breakers are equipped with horizontal main circuitconnections on the rear for up to 3200 A as standard (horizontalconnection to busbars). Exception: Circuit breakers of size IIwith max. rated current 4000 A. They are equipped with verticalmain connections (for upright busbars).Front connectionwith double holeNSE0 00971bMain circuit connectionsHorizontalconnectionNSE0 00967bThe circuit breaker is moved with the help of a hand crank. Theconnected position as well as the disconnected position isachieved by moving the circuit breaker to the end stop. ShuttersInadvertent touching of live main contacts or busbars is prevented by covering with a shutter. The shutter is constructedin two parts and allows the upper or lower connection areas tobe opened separately for the purpose of checking that theyare not live. The divided shutter can be interlocked in the openor closed position and two padlocks can be fitted.NSE0 00969bClosing of the crank hole is only possible in the circuit breakerpositions (connected, test or disconnected position). The circuitbreaker position is shown on a display on the circuit breaker.Front connectionwith double holeVerticalconnectionMain circuit connectionsGuiderailShutterGuide frameVertical busbars, up to 3800 ASiemens LV 35 · 20192/52
Siemens AG 20193WT Air Circuit Breakers up to 4000 A (AC)General data2Opening, closing and locking devices ON and OFF buttons- Mechanical ON buttonIn the standard version, the mechanical ON button is a pushbutton.- Mechanical OFF buttonIn the standard version, the mechanical OFF button is apushbutton. As an alternative to a pushbutton, a safety lock(CES) can also be supplied.If the key is removed in the "0" position, it is no longer possible to close the circuit breaker mechanically. Locking device against moving the withdrawable circuitbreakerAccess to the crank hole and application of the crank is prevented by means of one or more padlocks. This also preventsmovement of the withdrawable circuit breaker in the guideframe.Electronic trip units - ETUAuxiliary releasesUp to two auxiliary releases can be installed at the same time.The following are available:1 shunt release or1 undervoltage release or2 shunt releases or1 shunt release 1 undervoltage releases.Undervoltage releasesThe undervoltage release causes the circuit breaker to beopened if the operational voltage falls below a certain value or isnot applied. The circuit breaker cannot be closed manually or bymeans of an electrical ON command if the undervoltage releaseis not connected to the operational voltage. The undervoltage release has no delay as standard. A delay can be set by the customer in the range between td 80 ms and td 200 ms.In addition, an undervoltage release with a delay in the rangefrom 0.2 to 3.2 s is available.Closing solenoidThe closing solenoid is used to close the circuit breaker electrically by means of a local electrical ON command or by a remoteunit.Motorized operating mechanismsThe operating mechanism is used to load the storage spring automatically.The operating mechanism is activated if the storage spring hasbeen unloaded and the control voltage is available.It is switched off automatically after loading. This does not affectmanual operation of the storage spring.Indicators, signals and cont
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