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What are the losses in a transmission line?
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Mar 10, 2018
by
anonymous
What are the losses in a transmission line?
losses
transmission
line
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asked
Sep 22, 2018
by
anonymous
Explain following techniques related to energy conservation in transmission and distribution system. (i) By balancing phase currents (ii) Variable technical losses (I2R losses).
Explain following techniques related to energy conservation in transmission and distribution system. (i) By balancing phase currents (ii) Variable technical losses (I2R losses).
Last answer:
(i) Balancing Phase currents: Proper (healthy balanced) three phase loads always draw equal currents in all lines but single phase loads in the 3 phase 4 wire system or loads connected between two ... . 11) Minimize I2R losses. 12) Balance the load currents. 13) Regulate the system voltages.
energy
conservation
transmission
distribution
system
balancing
phase
currents
variable
technical
losses
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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.
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
medium
transmission
line
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70
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1
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asked
May 8, 2018
by
anonymous
In a transmission line if booster transformers are to be used, preferred location will be
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
transmission
line
booster
transformers
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1
answer
asked
Jun 18, 2018
by
anonymous
A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient?
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
transmission
line
terminated
impedance
reflection
coefficient
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1
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asked
Apr 28, 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,
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
sending
end
receiving
voltages
three-phase
transmission
line
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Aug 18, 2017
by
anonymous
what is mean by medium transmission line ?
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.
medium
transmission
line
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asked
Aug 18, 2017
by
anonymous
what is mean by short transmission line ?
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.
short
transmission
line
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asked
Aug 18, 2017
by
anonymous
what is mean by long transmission line ?
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.
long
transmission
line
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1
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asked
Aug 25, 2019
by
anonymous
HVDC transmission line in India:
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
hvdc
transmission
line
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1
answer
asked
Apr 29, 2018
by
anonymous
Series capacitive compensation in EHV transmission line is used to
Series capacitive compensation in EHV transmission line is used to
Last answer:
To maintain voltage stability
series
capacitive
compensation
ehv
transmission
line
used
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2
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asked
May 8, 2018
by
anonymous
The sag of a transmission line is least affected by
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.
sag
transmission
line
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1
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asked
Apr 30, 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
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
short
transmission
line
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asked
Apr 29, 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
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
transmission
line
parameters
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91
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1
answer
asked
Apr 26, 2018
by
anonymous
Transmission efficiency of a transmission line increases with the
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
transmission
efficiency
line
increases
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67
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1
answer
asked
Mar 20, 2018
by
anonymous
The interaction between a transmission line and communication line is minimized by?
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.
interaction
between
transmission
line
communication
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1
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asked
Mar 20, 2018
by
anonymous
When a transmission line is energized, the wave that propagates on it is?
Last answer:
When a transmission line is energized, the wave that propagates on it is current wave and voltage wave.
transmission
line
energized
wave
propagates
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1
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asked
May 8, 2018
by
anonymous
Stability of a transmission line can be increased by
Stability of a transmission line can be increased by
Last answer:
Stability of a transmission line can be increased by Shunt capacitor, Series capacitor
stability
transmission
line
increased
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1
answer
asked
May 3, 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
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
transmission
line
impedance
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359
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1
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asked
Mar 20, 2018
by
anonymous
When a wave propagates on a transmission line, it suffers reflection several times at?
Last answer:
When a wave propagates on a transmission line, it suffers reflection several times at sending and other end.
propagates
transmission
line
suffers
reflection
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91
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1
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asked
Mar 19, 2018
by
anonymous
A transmission line is protected by?
Last answer:
A transmission line is protected by distance protection, time graded and current graded overcurrent protection.
transmission
line
protected
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1
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asked
May 22, 2020
by
anonymous
State the limitations of EHVAC transmission line.
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.
ehvac
transmission
line
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82
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1
answer
asked
May 6, 2020
by
anonymous
State the impact of inductance and resistance on transmission line performance
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
state
the
impact
of
inductance
and
resistance
on
transmission
line
performance
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1
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asked
May 22, 2020
by
anonymous
State line parameters of transmission line.
State line parameters of transmission line.
Last answer:
Following are the of Line parameters of transmission line: 1. Resistance 2. Inductance 3. Capacitance
line
parameters
transmission
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asked
Aug 25, 2019
by
anonymous
effect of inductance and capacitance on performance of transmission line.
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.
inductance
capacitance
performance
transmission
line
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77
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1
answer
asked
Aug 25, 2019
by
anonymous
effect of line parameter on performance of transmission line.
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.
transmission
line
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1
answer
asked
Aug 18, 2019
by
anonymous
Why is transmission line 11kV, 33kV 66kV Not Is 10kV, 20kV, 30kV ?
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.
transmission
line
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3
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asked
Mar 20, 2018
by
anonymous
Which relay is preferred for phase fault on short transmission line?
Last answer:
Reactance relay is preferred for phase fault on short transmission line.
relay
phase
fault
short
transmission
line
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91
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1
answer
asked
Mar 10, 2018
by
anonymous
What are the advantages of high voltage transmission?
What are the advantages of high voltage transmission?
Last answer:
Advantages: 1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases ... line increases 12. As transmission voltage increases power handling capacity of transmission line increases
advantages
high
voltage
transmission
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3.1k
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1
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asked
Mar 8, 2018
by
anonymous
What are the types of power losses in inductor?
What are the types of power losses in inductor?
Last answer:
Copper losses, Eddy current loss, and hysteresis loss are the types of power losses in inductor.
types
power
losses
inductor
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93
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1
answer
asked
Sep 27, 2017
by
anonymous
what are the losses in DC machine?
Last answer:
Iron loss, copper loss and mechanical losses these are the losses in DC machine.
losses
dc
machine
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78
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1
answer
asked
Mar 10, 2018
by
anonymous
What is the difference between a line voltage and low voltage control system?
What is the difference between a line voltage and low voltage control system?
difference
between
line
voltage
low
control
system
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99
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0
answers
asked
Mar 10, 2018
by
anonymous
What is the difference between line and phase current?
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
difference
between
line
phase
current
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90
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1
answer
asked
Mar 10, 2018
by
anonymous
What is the difference between line and phase voltage?
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).
difference
between
line
phase
voltage
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130
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1
answer
asked
Mar 20, 2018
by
anonymous
Iron losses in a D.C. machine are independent of variations in?
Last answer:
Iron losses in a D.C. machine are independent of variations in load.
iron
losses
dc
machine
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111
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1
answer
asked
Mar 19, 2018
by
anonymous
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?
Last answer:
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are hysteresis and eddy current losses.
transformer
voltage
losses
constant
load
changes
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103
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1
answer
asked
Apr 28, 2018
by
anonymous
In voltage source converter based HVDC transmission system the active power is controlled by changing
In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last answer:
In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage
voltage
source
converter
hvdc
transmission
system
active
power
controlled
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98
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1
answer
asked
Mar 10, 2018
by
anonymous
Why high voltage is used in power transmission?
Why high voltage is used in power transmission?
Last answer:
The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmissionreduces resistance in the conductors aselectricity flows ... This means that thin, light-weight wires can beused in long-distance transmission.
high
voltage
power
transmission
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5.2k
views
2
answers
asked
May 8, 2018
by
anonymous
The friction losses in Real Transformers are :
The friction losses in Real Transformers are : (A) 0% (B) 5% (C) 25% (D) 50%
Last answer:
A
friction
losses
real
transformers
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2.5k
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2
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asked
Mar 26, 2018
by
anonymous
In DC motor iron losses are occurred in?
In DC motor iron losses are occurred in?
Last answer:
In DC motor iron losses are occurred in the armature.
dc
motor
iron
losses
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110
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1
answer
asked
Mar 20, 2018
by
anonymous
In case of D.C. machines, mechanical losses are primary function of?
Last answer:
In case of D.C. machines, mechanical losses are primary function of speed.
mechanical
losses
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172
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1
answer
asked
Mar 19, 2018
by
anonymous
Reduction in core losses and increase in permeability are obtained with transformer employing?
Reduction in core losses and increase in permeability are obtained with transformer employing?
Last answer:
Reduction in core losses and increase in permeability are obtained with transformer employing core built-up of laminations of cold rolled grain oriented steel.
reduction
core
losses
increase
permeability
obtained
transformer
employing
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592
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1
answer
asked
Mar 19, 2018
by
anonymous
Losses which occur in rotating electric machines and do not occur in transformers are?
Losses which occur in rotating electric machines and do not occur in transformers are?
Last answer:
Friction losses windage losses
losses
rotating
electric
machines
transformers
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108
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2
answers
asked
Mar 8, 2018
by
anonymous
What is the percentage of stray losses in DC machine?
What is the percentage of stray losses in DC machine?
Last answer:
Percentage of stray losses in DC machine is about 1 % .
percentage
stray
losses
dc
machine
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90
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1
answer
asked
Mar 20, 2018
by
anonymous
In a D.C. generator, the iron losses mainly take place in?
Last answer:
In a D.C. generator, the iron losses mainly take place in armature rotor.
dc
generator
iron
losses
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239
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1
answer
asked
Mar 20, 2018
by
anonymous
The total losses in a well designed D.C. generator of 10 kW will be nearly?
Last answer:
The total losses in a well designed D.C. generator of 10 kW will be nearly 500 W.
losses
dc
generator
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97
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1
answer
asked
Mar 18, 2018
by
anonymous
In a synchronous motor which losses varies with load?
In a synchronous motor which losses varies with load?
Last answer:
In a synchronous motor, copper losses varies with load.
synchronous
motor
losses
varies
load
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62
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1
answer
asked
Aug 25, 2019
by
anonymous
requirements or properties of the line supports used in transmission and distribution.
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
line
supports
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42
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1
answer
asked
Jan 21, 2020
by
Shubham
Why use phase modifiers in case of long transmission line
why-use-phase-modifier-in-long-transmission
line
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80
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0
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asked
May 3, 2020
by
anonymous
State the losses in secondary distribution system.
State the losses in secondary distribution system.
Last answer:
The losses in secondary distribution system: a) Technical losses: 1. Due to poor voltage 2. Due to unbalance load 3. Due poor quality of transformer & its components 4. Due to poor quality ... of induction type of energy meter. 3. Lack of administration. 4. Energy theft 5. Unmetered supply
state
the
losses
in
secondary
distribution
system
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53
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1
answer
asked
Mar 3, 2018
by
anonymous
In synchronous motor, does the winding losses vary with load?
In synchronous motor, does the winding losses vary with load?
Last answer:
No, in the synchronous motor the winding losses do not vary with load.
synchronous
motor
winding
losses
vary
load
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492
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1
answer
...