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Symmetrical & Unsymmetrical Fault In Three Phase Transmission Line Prepared By: Siddiqui Arshad hussain [email protected]

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Symmetrical & Unsymmetrical Fault In Three Phase Transmission LinePrepared By:Siddiqui Arshad hussain

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GOVERNMENT ENGINEERING COLLAGE [email protected]

ContentsIntroduction Types of FaultSymmetrical FaultUnsymmetrical FaultTransient in RL series circuit Selection of C.B.Types of [email protected]

Introduction

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Under normal conditions, a power system operates under balanced conditions with all equipments carrying normal load currents and the bus voltages within the prescribed limits. This condition can be disrupted due to a fault in the [email protected]

Types of FaultSymmetrical faultLLL faultLLLG fault

Unsymmetrical faultLGLLLLG

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LLL fault

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LLLG fault

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LG,LL,LLG fault

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Transient in RL series circuit

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Selection of C.B.Voltage RatingFrequencyMaximum interrupting capacityContinues current ratingTypes of operating mechanism usedOperating conditionMaintenance and testingCost

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Types of C.B.Oil Circuit breakerAir blast Circuit breakerVacuum Circuit breakerSf6 Circuit [email protected]

Referencehttp://www.electrical-installation.org/enwiki/Selection_of_a_circuit-breakerhttp://www.electrical-installation.org/enwiki/Selection_of_a_circuit-breakerElectric circuit (by: R.P. Ajwalia),Pub: Atul Prakashanhttp://www.electrical4u.com/electrical-power-transmission-system-and-network/http://www.skm-eleksys.com/2011/03/transmission-line-parameters.htmlhttps://en.wikipedia.org

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