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ABB B.G. Controlled Switching Ed2

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Controlled Switching Buyer´s Guide Application Guide Microprocessor based controllers for point-on-wave switching of ABB circuit breakers for transient reduction and improved power quality. Controlled Switching — Buyer´s Guide Edition 2, 2006-09  Contents Table of Contents Chapter-Page Application Introduction Explanations Application, Connections and Choice: Introduction Capacitor Banks and Harmonic Filters Shunt Reactors Power Transformers Transmission Lines Adaptive Functions Impact
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  Controlled Switching — Buyer´s Guide  Edition 2, 2006-09 Microprocessor based controllers or point-on-wave switching o ABBcircuit breakers or transient reduction and improved power quality. Controlled Switching Buyer´s Guide Application Guide  Controlled Switching — Buyer´s Guide  A- Edition 2, 2006-09 Table o Contents Contents Introduction  A-2 Explanations B-  Application, Connections and Choice: IntroductionC-Capacitor Banks and Harmonic FiltersD-Shunt ReactorsE-Power TransormersF- Transmission LinesG- Adaptive FunctionsH-Impact o Substation ConigurationI-Circuit Breakers with Staggered PolesJ- Technical Data:  Technical and Shipping DataK-DrawingsL-  Accessories M- Quality, Testing and Commissioning N- Inquiry Data O- Technical Inormation Chapter-Page  Application  Controlled Switching — Buyer´s Guide  A-2 Edition 2, 2006-09 Controlled Switching with Switchsync TM Introduction  ABB has extensive service experience with controlled switching, and the rstgeneration o Switchsync™ controllers was launched in 1986. Controlled switch-ing is used or elimination o harmul electrical transients upon planned switch-ing o mainly capacitor banks, shunt reactors and power transormers. Themethod is also gaining acceptance or reenergizing o EHV transmission lines,and replacing traditional pre-insertion resistors. Since 1986, thousands oSwitchsync TM controllers have been delivered all over the world. The Family o Switchsync TM controllers consists o: Switchsync TM  ControllerMain ApplicationControls CircuitBreaker OperationCircuit BreakerOperation E3Shunt Capacitor Banks,Shunt ReactorsOpen or CloseThree-poleE23Shunt Capacitor BanksOpen and CloseThree-poleF236Shunt Capacitor Banks,Shunt Reactors, Power TransormersOpen and CloseSingle-pole T83Power TransormersCloseSingle-poleL83Uncompensated Transmission LinesCloseSingle-pole  All controllers have provisions or adaptive input to compensate or systematic variations in operating timeo the circuit breaker. In addition, Switchsync TM F236, T183, and L183 have provisions or two external,predictive inputs (e.g. temperature variation, control voltage). These unctions make it possible to achieveadded precision in the timing o the controlled circuit breaker. They also have a data memory that storesinormation on switching times, thus permitting condition monitoring o the circuit breaker. Sensors orcompensation purposes and communication sotware or all controllers except E-models are accessoriesthat are ordered separately.Switchsync™ E213 and F236  ABB is at the oreront o development o controlled switching and its applications, andhas built up unique expertise in switchingtransients and mitigation o related problemsin both main and secondary circuits. Ourdevelopment program is strongly ocused onproviding added value or our customers. A key aspect o all controlled switchingapplications is the precision achieved duringmaking and breaking. Circuit breaker HPL 550B2 controlled bySwitchsync™ or smooth shunt reactor switching.  The live tank circuit breakers supplied by ABB are particularly well suited or controlledswitching due to their good stability inregards to mechanical operating time anddynamic dielectric behavior. In addition,the Switchsync  TM controllers are equippedwith a special adaptive control, whichcompensates or any systematic variationsin operating time. Necessary signals or theunction are received rom existing instrumenttransormers.  Controlled Switching — Buyer´s Guide B- Edition 2, 2006-09 Explanations Explanations  Applications  Applications  The ollowing applications apply to controlled switching:Shunt capacitor banks:Basic aim is to control closing to minimize the energizing transients (voltagetransients as well as inrush currents). To improve interrupting perormance,controlled opening can also be utilized.Shunt reactors:Basic aim is to control de-energizing to ensure reignition-ree behavior. Inaddition, controlled closing also serves as a useul method or minimizinginrush currents.No-load transormers: The purpose o controlled no-load transormer switching is to minimize theinrush currents (and voltage distortion) by taking residual ux into account.Depending on the type o application and type o controller, controlledopening can serve as support or controlled closing.No-load overhead lines:Controlled re-energizing or energizing o overhead lines ensures minimizedswitching transients. Load Characteristics Shunt CapacitorBanks  The shunt capacitor banks (or flter banks) may be grounded orungrounded.Directly ater de-energizing, the bank will be ully charged. Time relaysnormally block energizing o the capacitor banks until they are discharged. The shunt capacitor banks may be arranged either as a single bank or in aback-to-back confguration. Shunt Reactors  The magnetic as well as electric circuit may vary. The ollowing types o reactors may apply:- Shell type- Core type (single-phase units, fve-limbed type or three-limbed type)- Air core type The electric circuit may be arranged in the ollowing ways:- Y-connected and solidly grounded- Ungrounded (Y-connected or delta connected)- Reactor groundedReactors are characterized by having a linear magnetizing characteristiccurve (by air gap). Power Transormers Iron core as well as electrical connection o the windings may vary. Transormers are characterized by a non-linear magnetizing curve. UncompensatedTransmission Lines Line is characterized by having no compensation equipment betweenthe line circuit breakers. With line CVT (Capacitor Voltage Transormer), ahealthy phase will be ully charged or some seconds ater de-energizing. Shunt ReactorCompensatedTransmission Lines Line is characterized by having shunt reactors connected to the line andbeing switched together with the entire line. The voltage o a healthy line will oscillate or some seconds (dependingon weather conditions and type o voltage transormers) with a requencydetermined by the degree o compensation.
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