Last Answer : The inductive interference between power and communication line can be minimized by transposition of the power line, transposition of the communication line.
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175 views
1 answer
asked
Mar 20, 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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88 views
1 answer
asked
Apr 26, 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
Last Answer : When a wave propagates on a transmission line, it suffers reflection several times at sending and other end.
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130 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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125 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
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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318 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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70 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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188 views
1 answer
asked
May 6, 2020
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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172 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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186 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
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
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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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153 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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346 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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451 views
1 answer
asked
May 3, 2018
by
anonymous
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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309 views
1 answer
asked
Apr 30, 2018
by
anonymous
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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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163 views
1 answer
asked
Apr 29, 2018
by
anonymous
Series capacitive compensation in EHV transmission line is used to
Last Answer : To maintain voltage stability
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466 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
What are the losses in a transmission line?
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61 views
0 answers
asked
Mar 10, 2018
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 short transmission line ?
Last Answer : The transmission lines which have length less than 80 km is known as short transmission lines.
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104 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
What is the difference between line and phase current?
Last Answer : The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current
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132 views
1 answer
asked
Mar 10, 2018
by
anonymous
What is the difference between line and phase voltage?
Last Answer : Line voltage is voltage between two phases R &Y (415 v) while phase voltage is the voltage between one phase and a neutral B & N (240 v).
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207 views
1 answer
asked
Mar 10, 2018
by
anonymous
What is the difference between a line voltage and low voltage control system?
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117 views
0 answers
asked
Mar 10, 2018
by
anonymous
How do you do the "Suck Face" interaction on the sims 2?
Last Answer : It’s called “Make Out.” You can only do it when your relationship with a person is “Lover” or “Crush.” I own that game…it’s pretty fun. =)
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0 views
1 answer
asked
Feb 26
by
anonymous
Precise control of reactive current flow entering the transmission and distribution systems can be minimized by using (A) synchronous condenser (B) static VAR capacitor (C) capacitor bank (D) thyristor switched reactor in parallel with capacitor
Last Answer : Precise control of reactive current flow entering the transmission and distribution systems can be minimized by using (A) synchronous condenser (B) static VAR capacitor (C) capacitor bank (D) thyristor switched reactor in parallel with capacitor
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138 views
1 answer
asked
Apr 28, 2018
by
anonymous
The interaction between a transmission line and communication line is minimized by (a) transposing transmission as well as communication lines (b) increasing the height of the transmission line tower (c) increasing the distance between the two lines (d) all of the above
Last Answer : (d) all of the above
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9 views
1 answer
The surge impedance for over head line is taken as (1) 10-20 ohms (2) 50-60 ohms (3) 100-200 ohms (4) 1000-2000 ohms
Last Answer : The surge impedance for over head line is taken as 100-200 ohms
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108 views
1 answer
asked
May 1, 2018
by
anonymous
A lightening arrester connected between the line and earth in a power system (1) protects the terminal equipment against travelling surges (2) protects the transmission line against direct ... suppresses high frequency oscillations in the line (4) reflects back the travelling wave approaching it
Last Answer : A lightening arrester connected between the line and earth in a power system protects the terminal equipment against travelling surges
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365 views
1 answer
asked
Apr 29, 2018
by
anonymous
The reactive power transfer over a line mainly depends on
Last Answer : The reactive power transfer over a line mainly depends on lVsl- lVRl
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411 views
1 answer
asked
Apr 27, 2018
by
anonymous
lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has reached the far end, then the far end of the line is
Last Answer : lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has reached the far end, then the far end of the line is terminated into a resistance equal to surge impedance of the line
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104 views
1 answer
asked
Apr 26, 2018
by
anonymous
Last Answer : Impedance relays are used for phase faults on long line.
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82 views
1 answer
asked
Mar 20, 2018
by
anonymous
In trying to resolve an issue, I hurt a friend and friend hurt me. What should I do?
Last Answer : “I unintentionally hurt him. I’m sorry for hurting him but I don’t think I’m wrong ” Start by saying that to your friend, and adding that you can work things out, that is what friends do. Let your friend know that you value this friendship and thus wish to repair the differences.
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0 views
1 answer
asked
Mar 2
by
anonymous
Why is it a very bad idea to interact with spam questions, even harmlessly?
Last Answer : [Mod Says] There's no problem with harmlessly interacting with spam questions-just be sure it's actually spam! We used to have a big problem with jellies jumping the gun and leveling accusations ... problem with multiple flags. But a lot of jellies seem to appreciate the time it saves them.
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1 view
1 answer
asked
Mar 2
by
anonymous
If you're having a bad day, who's generally the first person you think of calling?
Last Answer : My best friend, she is like a sister to me! But if you’re really close to one of your parents, then I’d try them…they have most likely gone through what you are and can help a lot!
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0 views
1 answer
asked
Feb 27
by
anonymous
Did you ever ask a question on ask-public just because you were looking for attention.
Last Answer : Most of my questions ask for different opinions, or preferences, so I don't think so. The rest of my questions are things I need help with. I guess it's kinda like attention, but they're usually things ... , so that may not count much. Anyways, I don't have to try very hard to get attention haha.
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1 view
1 answer
asked
Feb 27
by
anonymous
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The voltage of transmission can be regulated by (A) Use of tap changing transformers (B) Switching in shunt capacitors at the receiving end during heavy loads (C) Use of capacitors to neutralize the effect of series reactance (D) Any of the above methods
Last Answer : The voltage of transmission can be regulated by (A) Use of tap changing transformers (B) Switching in shunt capacitors at the receiving end during heavy loads (C) Use of capacitors to neutralize the effect of series reactance (D) Any of the above methods
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104 views
1 answer
asked
May 8, 2018
by
anonymous
Last Answer : Ungrounded neutral transmission system is not recommended because of system insulation being overstressed due to over voltages, insulation overstress may lead to failure and subsequent phase to phase faults, being inadequately protected against ground fault.
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68 views
1 answer
asked
Mar 20, 2018
by
anonymous
What is the difference between relay and contactor?
Last Answer : Relay have smaller ratings. Contactor is a high rating relay.
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5.1k views
1 answer
asked
May 2, 2018
by
anonymous
ln HRC fuse the time between cut-off and final current zero is called
Last Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time
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139 views
1 answer
asked
Apr 26, 2018
by
anonymous
Last Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.
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396 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : A differential relay measures the vector difference between two or more similar electrical quantities.
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159 views
1 answer
asked
Mar 19, 2018
by
anonymous
What is the difference between a switch and a relay?
Last Answer : Switch is simply a mechanical contact mechanism and relay is a electromagnetic switch . Switch can be direct mechanically turn on and off but relay can be operated by energising coil .
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110 views
1 answer
asked
Dec 17, 2017
by
anonymous
96 views
0 answers
asked
Jan 21, 2020
by
Shubham
