Question

A 3 phase system, 33 kv with the conductor suspended by insulating string three insulators. The...

A 3 phase system, 33 kv with the conductor suspended by insulating string three insulators. The capacitance of each insulator disc is ten times the capacitance to ground. calculate:
a) the voltage across each insulator
b) string efficiency

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Each line of a 3-phase system is suspended by a string of 3 similar insulators. If...
Each line of a 3-phase system is suspended by a string of 3 similar insulators. If the voltage across the line unit is 17·5 kV, calculate the line to neutral voltage and string efficiency. Assume that shunt capacitance between each insulator and earthed metalwork of tower to be 1/10th of the capacitance of the insulator.
1- A 69-kV, three-phase short transmission line is 16 km long. The line has a per...
1- A 69-kV, three-phase short transmission line is 16 km long. The line has a per phase series impedance of 0.125 + j0.4375 ohm per km. Determine the sending end voltage, voltage regulation, the sending end power, and the transmission efficiency when the line delivers a. 70 MVA, 0.8 lagging power factor at 64 kV b. 120 MW, unity power factor at 64 kV 2-three-phase, completely transposed 345-kV, 200 km line has two 795,000- cmil 26/2 ACSR conductor per bundle...
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is...
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is connected to a three phase Y-Y transformer T1 which feeds a 132 kV 10 miles transmission line having an impedance per phase of 2 + j5 ?/mile. At the receiving end of the transmission line is a Y-Y step down transformer T2. Three loads are connected to the secondary side of the transformer T2. Loads are as follows: Load#1 40 MVA at 0.8 pf...
A 132 KV, 50 HZ, 3 phase, 3 core metal sheathed cable gave the following resutls...
A 132 KV, 50 HZ, 3 phase, 3 core metal sheathed cable gave the following resutls in testing for capacitance: (a) capacitance between shorted conductors and sheath is 0.8 micro farad. (b) capacitance between two conductors shorted with sheath and the third conductor is 0.6 micro farad. Draw the test arrangment in each case and determine: (i) the capacitance between any two conductors. (ii) the conductor self capacitance and the capacitance between any two shorted conductors and the third conductor....
1- 30-kV, three-phase transmission line has a per phase series impedance of z = 0.05+j0.45 ohm...
1- 30-kV, three-phase transmission line has a per phase series impedance of z = 0.05+j0.45 ohm per Km and a per phase shunt admittance of y = j3.4x10-6 siemens per km. The line is 80 km long. Using the nominal π model, determine a The transmission line ABCD constants. b Find the sending end voltage and current, voltage regulation, the sending end power and the transmission efficiency when the line delivers 1. 200 MVA, 0.8 lagging power factor at 220...
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase...
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase series impedance of 0.007 + j0.075 per unit (shunt parameters are ignored). The low voltage side is connected to a short distribution line which modeled by a series per phase impedance of 0.02 +j0.1 per unit on the base of 10 MVA. The line supplies a balanced three phase constant impedance load at 4 MVA, 13.2 kV with power factor of 0.85 lagging •...
The capacitances per Km of 3 core cable are 0.9 micro farad between the three bunched...
The capacitances per Km of 3 core cable are 0.9 micro farad between the three bunched conductor and the sheath, and 0.4 micro farad between one conductor and the other two connected to the sheath. Draw the arrangement in each case and find: a) the line to ground capacitance of a 20 Km cable length. b) charging current if the cable operates at 11 KV line voltage at 50 HZ. c) the power loss and loss angle if the power...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5. a) Calculate primary and secondary line and phase currents. b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5. a) Calculate primary and secondary line and phase currents. b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To...
A 3-phase, Y-connected 4-wire system with grounded neutral carrying 60 A at 60 Hz per phase...
A 3-phase, Y-connected 4-wire system with grounded neutral carrying 60 A at 60 Hz per phase when balanced has 3rd harmonic current. The harmonic current is measured at 3 A/phase. a. For this system to remain without voltage distortion, what must be the current that the neutral carries to ground? (Easy answer.) b. The 3rd harmonic frequency is 180 Hz. If there is reactance XL = 2 Ω/phase in the line, what is the per phase capacitance (mF) of a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT