12) For a 115kV, 15mi long sub-transmission system, someone used the line reactance value of (12.0+j1.0) 2/phase. Is it correct or wrong? Discuss briefly.
Q: a. What are the main components of overhead transmission lines (OHTL)? b. List commonly used…
A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…
Q: A 500-kV, 60-Hz, 3-phase completely transposed overhead line has the resistance R = 0.0201/km, D =…
A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…
Q: A 3-phase load of 10 MVA, 22 kV, 0.8 pf lagging, is served by 3-phase transmission line which has a…
A: First calculate receiving end current. Per phase sending end voltage = per phase receiving end…
Q: 2. Taking the dielectric strength of air to be 30 kV/cm, calculate the disruptive critical voltage…
A: The solution can be achieved as follows.
Q: Chapter 4, Problem 4.18P Textbook Problem 223 views A 230-kV, 60-Hz, three-phase completely…
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Q: the
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Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2…
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Q: Question 03: What is the difference between balanced and unbalanced line transmission lines, show…
A: We need to state the differences between balanced and unbalanced transmission lines.
Q: 3-) Three-phase, 100 km long unit length and serial impedance per phase is 0,125+j0.34 2/km. The…
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Q: A three phase overhead transmission line is designed to deliver 190.5mva at 220kv over a distance…
A: The diameter of the conductor and its size
Q: Voltage regulation of a short transmission line is found to be zero, If resistance and reactance of…
A: Voltage regulation of a short transmission line is zero. Vs = Vr
Q: 2. A single phase transmission line has two parallel conductors 2.5 m apart, the radius of each…
A: Solution of given Q is showing in step 2
Q: 4.5 A 60-Hz, 765-kV, three-phase overhead transmission line has four ACSR 900 kcmil 54/3 conductors…
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Q: The voltage, current and power factor at the sending end of a single-phase transmission line are…
A: In this question we need to find a voltage at load side of transmission line
Q: 3-A 400 kV, 50 Hz, 700 km long symmetrical line is operated at the rated voltage. a) Calculate the…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: Giventhe uncompensated line of Problem 5.18, let a three-phase shunt reactor (inductor) that…
A: Consider a 230 mile, three phase overhead transmission line Here series impedance is Shunt…
Q: A three phase 60HZ, 60kV transmission line consisting of 3 conductors are placed at the corners of a…
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Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.6…
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Q: Parameters of Line transmission representations. Capacitance. Find the capacitance and capacitive…
A: The solution can be achieved as follows.
Q: In a three-phase 220 kV, 60 Hz overhead transmission line, the conductors have an overall radius of…
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Q: A 3- phase 132 kV, 50 Hz 150 km long overhead transmission line consists of three stranded aluminum…
A: Given: For a 3-phase, 132 kV, 50 Hz, 150 km overhead transmission line phase voltage Vph=1323=76.21…
Q: cm. 2. Taking the dielectric strength of air to be 30 kV/cm, calculate the disruptive critical…
A: Given Data: m = irregularity factor = 1 r = 1 cm g = 30 kv/cm (peak) = 30 kv/sqrt(2) (rms) d=…
Q: A 3-ph, 50 Hz, 150 km line has resistance, inductive reactance and capacitive admittance of 0.1, 0.5…
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Q: a) Discus why the transmission systems are mostly overhead systems. b)Discuss why all overhead lines…
A: ACSR- Aluminium conductor steel-reinforced cable Bundled conductors- When a single phase conductor…
Q: The 130 km long three phase 50HZ, 85kV transmission line consisting of 3 conductors are placed at…
A: Note: We are authorized to answer three sub-parts at a time, since you have not mentioned which part…
Q: One circuit of a single-phase transmission line is composed of three solid 0.5 cm radius wires. The…
A: Inductance | phase | m L=2×10-7 ln(DmDs) H|m For conductor 'x' Dm = (D11' D12')×(D21'…
Q: A 69-kV, three-phase short transmission line is 16 km long. The line has a per phase series…
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Q: The arrangement of conductors of a single-phase transmission line is shown in Figure wherein the…
A: According to the question we have to calculate the inductive reactance of the line.
Q: 22 A three-phase, 60-Hz transmission line is 100 mi long and has flat horizon pacing. Each phase…
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Q: Question: A three-phase, 60-Hz, completely transposed 345-kV, 200-km line has line constants: z=…
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Q: Q1 : in a 3-phase, 4-wire system , the curents in a, 6 and c lines under abnormal Condiions of…
A: In this question we will find sequence components of line current I a...
Q: A 69-kV, three phase short transmission line is 16km long. The line has a per phase series impedance…
A: We need to determine the sending end voltage, voltage regulation, the sending end power, and…
Q: A transposed overhead transmission line has self-reactance (X;) and mutual reactance (Xm) as 0.5…
A: Given, A transposed overhead transmission line has, Self reactance, Xs=0.5 ohmkm Mutual reactance,…
Q: 4.8. A three-phase transposed line is composed of one ACSR 159,000 cmil, 54/19 Lapwing conductor per…
A: Given data: GMR = 1.515 cm D = 8 m Solution: (a) Inductance per phase per kilometer of the line is…
Q: Question 3: A three-phase, 60-Hz transposed transmission line has a flat horizontal configuration as…
A: Given XL=0.486 Ω/KmXL=2πfLL=XL2πfL=0.4862×3.14×60L=1.289 mH/Km Expression of L…
Q: Single Phase Transmission Line has two parallel conductors 2 meters apart. The diameter of each…
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Q: A 3 phase, 50 Hz, 150 km line has a resistance, inductive reactance and capacitive shunt admittance…
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Q: A single phase load of 5 MW is transmitted by a pair of overhead conductors. If a third conductor of…
A: Single phase: The phase refers to the distribution of a load. A single-phase system uses a single…
Q: 3. A single-phase transmission line has two parallel conductors 3.2 meters apart, radius of each…
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Q: If the Transmission Line System is in Double Circuit Configuration, with three conductors in a…
A: In double circuit configuration each tower has six wires two for each phase. One wire acts as…
Q: phase bundled transmission line of 200 km length consists of three ACSR conductors as shown.…
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Q: The per-phase line loss in a 40 km long transmission line is not to exceed 60 kW while it is…
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Q: Question 2 continued () Calculate in polar form the line-to-neutral voltages corresponding to the…
A: Given Parameters are: X=2, Y=8 Va0=1X0∠0oV=120∠0oV Va1=1Y0∠45oV=180∠45oV Va2=1Y0∠1X0oV=180∠120oV…
Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2…
A: Actual weight of conductor is given w=1.4 kg/m Total weight of conductor is given, wt=3.2 kg/m…
Q: Calculate the limit of TL length at the full-load for three-phase, 450 MVA, 400 kV, 50 Hz, 400 mm²…
A: Given data, The diameter of the overhead line is 6.93. Overhead line = 400mm2 Voltage of overhead…
Q: Q#1: In a 3-phase, 4-wire system, the currents in R, Y and B lines under abnormal conditions of…
A: We’ll answer the first question since the exact one wasn’tspecified. Please submit a new question…
Q: Question # 03: What is the difference between balanced and unbalanced line transmission lines, show…
A: Given: The difference between the transmission lines which are balanced and unbalanced is asked.
Q: 2. A single phase transmission line has two parallel conductors 3 m apart, the diameter of each…
A: Given, Spacing between the conductors = 3 m = 300 cm diameter of conductor = 2.2 cm Radius of each…
Q: The capacitance between the line to neutral of a three-phase 50 Hz, 66KV overhead line conductors…
A: Capacitance between line to neutral C= 8.5×10-7 F/ph/m Frequency f= 50Hz Reactance Xc ?
Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2…
A: Total weight of conductor = 3.2 Kg/m, Actual weight of conductor = 1.4 Kg/m Weight due to wind = 0.4…
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- A 60 Hz, three-phase, transposed transmission line, is designed with three bobolink conductors per phase, in horizontal arrangement as shown in the figure below. Distance between consecutive phases is D = 6.2 m and distance among bundle conductors is h =0.5m. Each conductor has a radius of 18 mm and a GMR of 14.39mm. The per phase resistance is 1.677x10-5 2/m. r= 18 mm GMR= 14.39 mm a b h D D The per phase shunt admittance assuming zero conductance in µO/km is: О a., 5.4347 O b. j5.3316 О с /4.2266 O d. j4.0973 O e. 59630.2922 + j10.9770Question 3) A 200 km Three-Phase 50 Hz transposed transmission line is composed of one ACSR, 1,431,000 cmil, 47/7 Bobolink conductors as shown in Figure 3 (a).The Three-Phases have flat horizontal spacing of 11 meters as shown in the Figure. The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The Line is going to be replaced with a three conductor bundle of ACSR, 477,000 cmil, 26/7 Hawk conductors. The conductors have a diameter of 2.1793 cm and a GMR of 0.8839 cm. The new line will have an increased horisontal phese spacing of 14 meters as it is going to be operated at higher Voltage rating. The new line is shown in Figure 3 (b). The spacing between the bundles in Figure 3 (b) is 45 cm. Determine, a) The inductance for each case and the percentage change in inductance b) The inductive reactance for each line and the percentage change. c) *Comment on your results. a b 11 m 11 m Figure 3 (a) a b 14 m 14 m Figure 3 (b)Q: 3 Figure below shows a 735 kV three-phase transposed line composed of four ACSR, 954, 000- cmil, 45/7 Rail conductors per phase with horizontal conductor configuration. The conductor diameter is 2.959 cm and a GMR of 1.173. Bundle spacing is 46 cm. Calculate the inductance per phase per km of the line. D12=44.5' D23=44.5' D13=89'
- (a) A three phase transposed transmission tower comprises of three-bundled conductor and double-circuit configured in vertical position as shown in Figure 2. Each sub-conductor in each circuit and each phase is an ACSR type, size 477,000 cmil and stranding 26/7. Given the GMR of each sub-conductor is 0.8809 cm and diameter is 2.1793 cm, analyze: i. Inductance in mH/km ii. Capacitance in µF/km 0.75m 7.5m b' 4m 4m 45cm Figure 2A three phase transposed line is composed of one ACSR 159,000-cmil, 54/19 Lapwing conductor per phase with flat horizontal spacing of 8m as shown in the figure1. The GMR of each conductor is 1.515 cm. [5] D12 = 8 m D23 = 8 m -D13 = 16 m- Figure: 1 Now the line is replaced by a two-conductor bundle with 8 m spacing measured from the center of the bundles as shown in figure 2. The spacing between the conductors in the bundle is 40 cm. Determine the inductance per phase per kilometer for figure 1 and also if the line inductance per phase is to be 77 percent of the inductance found from figure1, what would be the GMR of each new conductor in the bundle for figure 2. Page 1 of 3 0,0 40 D12 = 8 m - D23 = 8 m D13 = 16 m Figure: 2A three-phase transposed line is composed of one ACSR 1,431,000 cmil, 47/7 Bobolink conductor per phase with flat horizontal spacing of 11 meters as shown in Figure (a). The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The line is to be replaced by a three-conductor bundle of ACSR 477,000 cmil, 26/7 Hawk conductors having the same cross-sectional area of aluminum as the single-conductor line (Figure (b)). The conductors have a diameter of 2.1793 cm and a GMR of 0.8839 cm. The new line will also have a flat horizontal configuration, but it is to be operated at a higher voltage and therefore the phase spacing is increased to 14 m as measured from the center of the bundles as shown in Figure (b). The spacing between the conductors in the bundle is 45 cm. Determine the inductance and capacitance for both lines. Calculate the percentage change in the capacitance and inductance for both lines. Interpret these changes.
- Write True or False and correct the wrong statement (An 7. The unit nearest to the cross-arm in tower has maximum voltage across it and hence it likely to be repaired. 8. Corona losses in DC Transmission supply 10 times more than AC transmission. 9. Irregularity Factor (mv) has value of 0.9 to 0.95 in rough conductor. 10.Power losses in corona dissipated in the form of conductor vibrating. 11. The corona loss on a particular system at 50 Hz is 1 kW/Km per phase but for the same system but 60 Hz will be 1.5 kW/Km per phase. 12.If the number of poles in 3ph 11kV transmission line is 80, then we need 420 discs to suspend the conductor on these poles.3-phase single circuit bundled conductor line with two sub-conductors per phase has horizontalspacing with 6.1 m between the centre lines of adjacent phases. The distance between the subconductorsof each phase is 30.5 cm and each sub-conductor has a diameter of 2.54 cm. Find theinductance per phase per km. [0.988 mh]In terms of cable performance, what are the effects of temperature fluctuations on transmission cabling?
- Q: 5 Figure below shows a 345 kV double-circuit three-phase transposed line composed of one ACSR, 556, 500-cmil, 26/7 Dove conductor per phase with horizontal conductor arrangement. The conductor has a diameter of 0.927 in and a GMR of 0.3768 in. Find the inductance per phase per km of the line. a b' -8 m 8 m 9 m 8 m 8 mA three-phase double circuit line is composed of ACSR Drake conductors arranged as shown. Calculate: (a) the line-to-neutral capacitance per mile, (b) the line-to-neutral capacitive reactance per mile, (c) the per phase inductance per mile, and (d) the per phase inductive reactance per mile. - 18' 10' 21' 10' 18'9.23 A three- phase, 230-KV, 60HZ, comple tely Eranspesed transmissin line 1113-MCM horizontal spacing with 5M between adjacent has one conductor pes phase, and a flat con duc tors. 1. Calcula be the capacitance per phase in Plm and the admitbance pes phase in S lkm. 2. Calculate Ehe to tal churging by the transmission line caraci tance when it is 125km long and operatel at 345K V. current taken