For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is
Last Answer : For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is 0.707 lead
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314 views
1 answer
asked
Apr 30, 2018
by
anonymous
Last Answer : Reactance relay is preferred for phase fault on short transmission line.
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110 views
1 answer
asked
Mar 20, 2018
by
anonymous
State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Last Answer : i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)
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362 views
1 answer
asked
May 22, 2020
by
anonymous
what is mean by medium transmission line ?
Last Answer : The transmission line which have length between 80 km to 250 km is known as medium transmission line.
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109 views
1 answer
asked
Aug 18, 2017
by
anonymous
what is mean by long transmission line ?
Last Answer : The transmission line which have length more than 250 km are known as long transmission lines.
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88 views
1 answer
asked
Aug 18, 2017
by
anonymous
effect of inductance and capacitance on performance of transmission line.
Last Answer : Following are the effect on performance of transmission line: 1. Due to inductance (L) voltage drop in transmission line produces. 2. Capacitor (C) draws charging current ... , transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.
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136 views
1 answer
asked
Aug 25, 2019
by
anonymous
While calculating performance of medium transmission line, what assumptions are made in case of (i) Nominal 'T' Method (ii) Nominal 'TT' Method.
Last Answer : (i) Assumptions are made in case of Nominal 'T' Method: a. It is assume that line capacitance is connected at center of transmission line. b. It is assume that half ... assumed that transmission line resistance & reactance per phase is connected in between two half transmission line capacitance
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178 views
1 answer
asked
Aug 25, 2019
by
anonymous
HVDC transmission line in India:
Last Answer : HVDC transmission line in India: S.N . From To Voltage 1 Rihand (U.P) (from 1990) Dadri +- 500 KV (bipolar) 2 Talcher- is the biggest ... (Chandrapur) Western Region 140KV 8 Connecting Southern region(Vizag- Gajuwaka) Eastern Region 140KV
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102 views
1 answer
asked
Aug 25, 2019
by
anonymous
effect of line parameter on performance of transmission line.
Last Answer : Following are the effect of line parameter on performance of transmission line: 1. Due to resistance (R), voltage drop in transmission line & copper losses in transmission line ... transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.
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76 views
1 answer
asked
Aug 25, 2019
by
anonymous
Why is transmission line 11kV, 33kV 66kV Not Is 10kV, 20kV, 30kV ?
Last Answer : 10kv plus to compensate losses in olden days 1kv were added and transmitted. Since all equipment used for transmission have a multiple of 11 from olden days, still that is being followed even though the losses are ... voltages, multiples of 11 is eazy for winding ratios.. i.e. 11kv to 33kv is 1:3.
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187 views
3 answers
asked
Aug 18, 2019
by
anonymous
A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9
Last Answer : A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9
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294 views
1 answer
asked
Jun 18, 2018
by
anonymous
The sag of a transmission line is least affected by (A) Self weight of the conductor. (B) Temperature of the surrounding air. (C) Current through the conductor. (D) Ice deposited on the conductor.
Last Answer : The sag of a transmission line is least affected by Current through the conductor.
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154 views
1 answer
asked
May 8, 2018
by
anonymous
A transmission line of 200 km has a certain A, B, C and D parameters. If the length is reduced to 60 km
Last Answer : A transmission line of 200 km has a certain A, B, C and D parameters. If the length is reduced to 60 km A increases, B decreases
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164 views
1 answer
asked
Apr 29, 2018
by
anonymous
State the limitations of EHVAC transmission line.
Last Answer : Following are the Limitations of EHVAC Transmission: 1. Insulation cost increases as voltage increases 2. Skin effect is more 3. Proximity effect is more. 4. Corona loss increases. 5. Radio ... 18. EHVAC is economical only for bulk amount of power is to be transmitted over long distance.
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330 views
1 answer
asked
May 22, 2020
by
anonymous
State line parameters of transmission line.
Last Answer : Following are the of Line parameters of transmission line: 1. Resistance 2. Inductance 3. Capacitance
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71 views
1 answer
asked
May 22, 2020
by
anonymous
State the impact of inductance and resistance on transmission line performance
Last Answer : Impact of inductance on transmission line: 1) It causes IXL drop in transmission line which affects regulation. 2) It is the only parameter which decides power transmission capacity of line i. ... is very small, it causes losses, temperature rise& poor voltage regulation so it cannot be neglected
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189 views
1 answer
asked
May 6, 2020
by
anonymous
Stability of a transmission line can be increased by
Last Answer : Stability of a transmission line can be increased by Shunt capacitor, Series capacitor
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363 views
1 answer
asked
May 8, 2018
by
anonymous
In a transmission line if booster transformers are to be used, preferred location will be (A) At the receiving end (B) At the sending end (C) At the intermediate point (D) Anywhere in the line
Last Answer : In a transmission line if booster transformers are to be used, preferred location will be At the intermediate point
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347 views
1 answer
asked
May 8, 2018
by
anonymous
A transmission line has 1 P.0 impedance on a base of 11 KV, 100 MVA. On a base of 55 KV. it will have a P.0 impedance of
Last Answer : A transmission line has 1 P.0 impedance on a base of 11 KV, 100 MVA. On a base of 55 KV. it will have a P.0 impedance of 0.02 P.U
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454 views
1 answer
asked
May 3, 2018
by
anonymous
Series capacitive compensation in EHV transmission line is used to
Last Answer : To maintain voltage stability
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468 views
2 answers
asked
Apr 29, 2018
by
anonymous
The sending end and receiving end voltages of a three-phase transmission line are 10 kV/ph and 9.5 kV/ph, respectively. If the resistance drop is 150 V/ph and receiving end power factor is 0.8, the sending end power factor is (A) 0.745 lagging (B) 0.775 lagging (C) 0.8 lagging (D) 0.85 lagging
Last Answer : Vscos¢s-Vrcos¢r=IR
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3.0k views
2 answers
asked
Apr 28, 2018
by
anonymous
Transmission efficiency of a transmission line increases with the
Last Answer : Transmission efficiency of a transmission line increases with the increase in power factor and voltage
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89 views
1 answer
asked
Apr 26, 2018
by
anonymous
Last Answer : When a wave propagates on a transmission line, it suffers reflection several times at sending and other end.
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131 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : The interaction between a transmission line and communication line is minimized by transposing transmission as well as communication lines, increasing the height of the transmission line tower, increasing the distance between the two lines.
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168 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : When a transmission line is energized, the wave that propagates on it is current wave and voltage wave.
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126 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : A transmission line is protected by distance protection, time graded and current graded overcurrent protection.
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82 views
1 answer
asked
Mar 19, 2018
by
anonymous
What are the losses in a transmission line?
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61 views
0 answers
asked
Mar 10, 2018
by
anonymous
Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.
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115 views
0 answers
asked
Apr 27, 2020
by
anonymous
Describe the difference between an open circuit and a short circuit.
Last Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit
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7.8k views
3 answers
asked
Jun 29, 2019
by
anonymous
Last Answer : Low voltage side is short circuited.
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164 views
1 answer
asked
Sep 27, 2017
by
anonymous
Last Answer : Primary is high voltage side and Secondary is low Voltage side.
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123 views
1 answer
asked
Sep 27, 2017
by
anonymous
Last Answer : In short circuit test of transformer the low voltage side is short circuited . On high voltage side the voltmeter is connected in parallel and ammeter in series and also a wattmeter is ... circuit test is done for determining impedance and losses. In this test iron losses is neglected.
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171 views
1 answer
asked
Sep 3, 2017
by
anonymous
96 views
0 answers
asked
Jan 21, 2020
by
Shubham
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requirements or properties of the line supports used in transmission and distribution.
Last Answer : Following are requirements or properties of the line supports used in transmission and distribution. 1. High mechanical strength:- It should have high mechanical strength to withstand against - ... . 8. Appearance: It should have good appearance or They must be of pleasing shape
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113 views
1 answer
asked
Aug 25, 2019
by
anonymous
Please, recommend me some extremely neat and short hair cuts for men!
Last Answer : It would be helpful if you include details about the texture of your hair and the shape of your face. Do you have facial hair? Are there any styles that you like?
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1 view
1 answer
asked
Feb 28
by
anonymous
How to Write a Short Autobiography ?
Last Answer : How to Write a Short Autobiography You may be asked to write a short autobiography every now and then, whether it's for a school assignment, a job application, or a contest you want to join. ... Writing an autobiography does not have to take you too long, provided you have these tips in mind.
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4 views
1 answer
asked
May 8, 2021
by
anonymous
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State advantages of short pitch winding over full pitch winding in alternators.
Last Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.
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484 views
1 answer
asked
May 7, 2020
by
anonymous
3X3 inverse of matrix short trick
Last Answer : 3X3 inverse of matrix short trick
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293 views
1 answer
asked
Sep 7, 2019
by
anonymous
If the % reactance upto the fault point is 20%, then the short circuit current will be
Last Answer : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current
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3.0k views
1 answer
asked
May 8, 2018
by
anonymous
The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents
Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only
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195 views
1 answer
asked
Apr 29, 2018
by
anonymous
Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.
Last Answer : Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.
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91 views
1 answer
asked
Apr 28, 2018
by
anonymous
Last Answer : Armature coil is short circuited by brushes when it lies along neutral axis.
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189 views
1 answer
asked
Mar 21, 2018
by
anonymous
Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.
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174 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : Short circuit test on transformers is conducted to determine copper losses.
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219 views
1 answer
asked
Mar 19, 2018
by
anonymous
In which fault the maximum short circuit current occurs?
Last Answer : In three phase bolted fault the maximum short circuit occurs.
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131 views
1 answer
asked
Mar 19, 2018
by
anonymous
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What can cause a short circuit?
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63 views
0 answers
asked
Mar 10, 2018
by
anonymous
Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission
Last Answer : (a) Increase of short-circuit current of the system
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20 views
1 answer
In the analysis of which of the following lines shunt capacitance is neglected ? (a) Short transmission lines (b) Medium transmission lines (c) Long transmission lines (d) Medium as well as long transmission lines
Last Answer : (a) Short transmission lines
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36 views
1 answer
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Constant voltage transmission entails the following disadvantage (a) large conductor area is required for same power transmission (b) short-circuit current of the system is increased (c) either of the above (d) none of the above
Last Answer : (b) short-circuit current of the system is increased
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12 views
1 answer
Is the power line voltage available in our homes a dc or an ac voltage?
Last Answer : The power line voltage available in our homes is AC. Mobile dwellings are the most commonly DC-supplied homes and even then they tend to include AC supply for heavier loads.
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5.2k views
1 answer
asked
Jun 29, 2019
by
anonymous
