B1, (i) A domestic lighting installation having 29, 70 W lamps is operated as follows: 7 lamps 6 Pm till 8 pm 14 lamps 8 pm till 10 pm 4 lamps 10 pm till 11.45 pm Determine the demand factor and monthly load factor. Demand factor DF= Daily load factor , LF =
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A: Given mvAb = 50 MVA at G with kvb =13.8 kwXG1 = 0.2 x5020 = 0.5 ;XT1 = 0.1x5025 = 0.2;XTL1 =…
Q: . The yearly load duration curve of a certain power station can be approximated as a straight line;…
A: The answer value given with question is incorrect, the correct solution can be achieved as follows.
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Q: Q1// The ratings of the power system elements shown in Fig.(1) are as follow: Generator: 15 MVA,…
A: Given data: Xg=0.15 pu Eg=13.8 kV XM1=0.15 pu EM1=13.8 kV XM2=0.15 pu EM2=14.4 kV XT1=0.1 pu…
Q: B1, (i) A domestic lighting installation having 25, 75 W lamps is operated as follows: 7 lamps 6 Pm…
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Q: e is 0.3Ω / km. calculate the efficiency and regulation of the line for 0.8 lagging power factor.
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Q: A load of 1250 KW is connected at the receiving end of a 3 phase transmission line 60 km long. The…
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Q: A load of 1000 KW is connected at the receiving end of a 3 phase transmission line 80 km long. The…
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Q: A load of 1000 KW is connected at the receiving end of a 3 phase transmission line 60 km long. The…
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Q: The domestic load in residential building is used in the following manner : Fluorescent lamps 55…
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Q: A domestic lighting installation having 24, 70 W lamps is operated as follows: 7 lamps 6 Pm till 8…
A: Given Data: Power of lamp = 70 W TOtal lamp = 24
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A: Note : Table 17.3 is not provided hence we have not calculated total monthly charge given power…
Q: A 3-phase, 50 Hz, 30 km long overhead line supplies 525 kW at 11 kV, 0.8 p.f. lagging. The line…
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A: In this question we need to draw single line diagram and per unit reactance diagram.
Q: A 50 Hz, 250 V single phase power line has the following loads placed across it in paralell; 4 kW at…
A:
Q: A domestic lighting installation having 18, 60 W lamps is operated as follows: 7 lamps 6 Pm till 8…
A: Given, a domestic lighting installation having 18, 60 W lamp, So, lamp rating = 60 W
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Q: 1. A factory takes the following balanced loads from a 440-V, 1-phase, 50-Hz supply: (i) a lighting…
A: Here welding load and motor load both are same P1=30K×cos∅=30K×.5=15KW…
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Q: Q1// The ratings of the power system elements shown in Fig.(1) are as follow: Generator: 15 MVA,…
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Q: . The yearly load duration curve of a certain power station can be approximated as a straight line;…
A: The solution can be achieved as follows. The answer attached with your question is incorrect.
Q: A 3-phase, 50 Hz, 55 km long overhead line supplies 550 kW at 22 kV, 0.6 p.f. lagging. The line…
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Q: 3. Assume that the two loads are supplied by 840V 60 hz line. Load A is a wye connected with 30 +…
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Q: A load of 1000 KW is connected at the receiving end of a 3 phase transmission line 80 km long. The…
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- q22/ A single phase, 50 Hz, overhead transmission line supplies 1300 kW at 26 kV, 0.65 p.f. lagging. The total resistance and line inductive reactance of the line are 4.75 Ω and 7.75 Ω respectively. Calculate the sending end voltage, voltage regulation, sending end power factor and efficiency of transmissionThe yearly load duration curve of a certain power station can be approximated as a straight line ; the maximum and minimum loads being 80 MW and 40 MW respectively. To meet this load, three turbine generator units, two rated at 20 MW each and one at 10 MW are installed. Determine (i) installed capacity (ii) plant factor (iii) kWh output per year (iv) load factor.A transmission line has an actual impedance of 18 ohms, compute for the per unit impedance of this line assume Vbase = 2400, Sbase = 100kVA power factor at unity p.f. round answer to 4 decimal places.
- Given a 400sq.m single family dwelling unit to be provided with 230V, 1-phase, 2-wire be service, andhaving the following loads: 2-1.5hp A/C, 2-1.0hp A/C, 1-0.5hp water pump, 4-800W water heater, 2-6kWelectric range and 2-1kW microwave oven, determine a) the total connected load, b) the total demand load,c) the overall %demand factor, d) the size of THW feeder conductor, ground wire and IMC conduit, e) therating of feeder overcurrent protection using inverse time circuit breakerA 3-phase overhead transmission line is being supported by three disc insulators. The potentials across top unit and middle unit are 9 kV and 11 kV respectively. Calculate: a. The ratio of capacitance between pin and earth to the self-capacitance of each unit. b. The line voltage. c. String efficiency. JAns: a. 0.22 b. 35.444 kV c. 76%]A 3-phase, 60 Hz, 55 km long overhead line supplies 575 kW at 11 kV, 0.9 p.f. lagging. The line resistance is 3.5 Ω per phase and line inductance is 10 mH per phase. Calculate the Reactance of the Line, Current flowing through the transmission line, Sending end voltage, Voltage regulation and Efficiency of transmission. Inductive Reactance= Current flowing through the transmission line= Sending end Voltage= Voltage Regulation of Transmission line= Transmission line efficiency= (please answer all 5 parts)
- A 3-phase transmission line is being supported by three-disc insulators. The potentials across top unit (i.e. near to the tower) and middle unit are 8 KV and 11 KV respectively. Calculate: 1) The ratio of capacitance between pin and earth to the self-capacitance of each unit 2) The line voltage 3) String efficiency Subject Power Transmission And DistributionIf for example communication power is often normalized by assuming R to be a unity in Ohms, although R may be another value in actual circuit. If the actual value of the power is required, it is worked out by de-normalization of the normalized value. Use the above to determine the instantaneous power, given time interval to be (-4,4) and x = 2 + t2.A 210V, 50 Hz, single phase radial distribution system, the resistance of the wire is 0.0008 ohm/m supply and return. Two loads are connected and it consumes 10 and 10 A respectively and are fed from the cable at distance of 15 and 15 respectively. Calculate the voltage available across load 1 and 2
- A single – phase transmission line supplies a reactive load at a lagging power factor. The load draws 1.2 pu current at 0.6 pu voltage while drawing 0.5 pu (true) power. If the base voltage is 20 kV and the base current is 160 A, calculate the power factor and the ohmic value of the resistance of the load.5. A11 kV,15 km length primary feeder connected to a balanced load of 950 kW at a power factor of 0.85 lagging. The impedance of a feeder is 4.5 +j7.5 ohms per km.Determine the following (a) The voltage drop and power loss of the feeder, when the load is uniformly distributed (b) The voltage drop and power loss of the feeder, when the load is nonuniformly distributed.A 3-phase, 50 Hz, 30 km long overhead line supplies 525 kW at 11 kV, 0.8 p.f. lagging. The line resistance is 5 Ω per phase and line inductance is 15 mH per phase. Calculate the Reactance of the Line, Current flowing through the transmission line, Sending end voltage, Voltage regulation and Efficiency of transmission. Inductive Reactance: Current flowing through the transmission line: Sending end Voltage: Voltage Regulation of Transmission line: Transmission line efficiency: