In single phase AC distribution system, the net drop is the sum of the drop in resistance due to the inphase component and in reactance due to quadrature component of current Select one: O True O False
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Q: A single phase transmission line is delivering 490 kVA load at 10 kV. Its resistance is 6.5 Q and…
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Q: A single phase transmission line is delivering 470 kVA load at 10 kV. Its resistance is 6.5 N and…
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A: As we have given: S=470 KVAV=12 KVR=7 ΩXL=7 ΩP.F.R=0.9
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A: current in transmission line = power delivered to load in KVA voltage in KV. sending end voltage =…
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Q: The resistance and reactance of the single- phase 60HZ transmission line conductors are 7.2 ohm and…
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- The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......What is the main direct cause of reactive power in AC system?A. Resistance of transmission linesB. Inductance and capacitance in the loadsC. Ideal transformer connected in the systemD. Power produced by generatorin distribution transformers; What is 30 degrees phase shift in delta-star connection? What are the disadvantages? (can you explain with drawing?)
- Please help with this balanced three-phase circuit problem.Two alternators rated 400 MW and 600 MW are operating in parallel. The droopcharacteristics of their governors are 3% and 4% respectively from no loadto full load. Assuming that the alternators are operating at 50 Hz at noload, how would a load of 1000 MW be shared between them? What will be thesystem frequency at this load?Connect three single-phase transformers in Y-Y, with subtractive polarity, so that the line-to-line voltages on the primary are 30 degrees delayed to their respective line-to-line voltages on the secondary. It should show each step that is needed to make this connection (example: the phasor diagram) and should show the final connection of the three transformers including the polarity markings. Assume phase A on the primary is terminal "H1".
- Subject - Design electrical circuits for single phase AC networks Question - Compare the effect of varying resistance, capacitance and inductance in a pararllel and series AC circuits on voltage resistance and impedance.8. It is the general practice to have the high voltage side lead the low voltage side by the above minimum phase shift. Draw phasor and circuit diagrams to accomplish this requirement for both the Y/A and A/Y connected transformers.Three single-phase transformers, each rated 10 MVA , 66.4/12.5 kV, 60 Hz , with an equivalent series reactance of 0.1 per unit divided equally between primary and secondary, are connected in a three-phase bank. The high-voltage windings are Y-connected and their terminals are directly connected to a 115-kV three-phase bus. The secondary terminals are all shorted together. Find the currents entering the high-voltage terminals and leaving the low-voltage terminals if the low-voltage windings are (a) Y-connected and (b) Δ- connected.
- In single phase AC distribution system, the net drop is the difference of the drop in resistance due to the inphase component and in reactance due to quadrature component of current Select one: True FalseDescribe the star-delta connection configuration types in three phase transformers and their necessity by drawing and writing. Thank you very much if you answer.6.5% ans ex A so kvA. 2o00/20 V, So He single-phase transformar has impedance drof of8% and resistance drop of 4%. Caleulate. The Requlation of the Thams former at full- Load o8 P.s Legging. also find The Power factor at which Voltage requlation will Be Zero. Sols 0.5 leading. s alculate The % Noltege Requlation af atransformar in w hich the Percantage resistance drof is 1% and Percentage dre is 6% when The Power fador is 0.8 lagging ) > unity aMS 38 % ans 1 % (シ→ 0.8 leading . amS - 2.2%