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I'm working on a project where I need to design a transmission line tap for a...

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Electrical Engineering

I'm working on a project where I need to design a transmissionline tap for a station generator. The parameters include sizingthree switches for the tap where at least one is a loop breakswitch. From where to start? What kind of calculations are neededto size the switches? What are those switches?

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4.2 Ratings (621 Votes)
7 Calculate Operating Conditions of the MotorsIf the motors are operating at 12 kV this represents 12 kV138 kV 087 perunit voltage At unity power factor the load is givenas threequarters or 075 puThus expressed in per unit the combined motor current isobtained by using the equationIper unit perunit powerperunit voltage 075087 0862 0pu8 Calculate the Generator Terminal VoltageThe voltage at the generator terminals isVG Vmotor the voltage drop through transformers andtransmission lineVG 0870 0862 0j0101 j0313 j0101VG 087 j0444 0977 2703 puIn order to obtain the actual voltage multiply the perunitvoltage by the base voltage at the generator ThusVG 0977 2703 138 kV 1348 2703 kVSingle line diagramThis technical article explains how to calculate and draw a singleline diagram of the threephase 60Hz system power system withgenerators motors transformers and lines The followingcomponents comprise a simplified version of a power system    See Answer
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