The voltages across various discs of suspension insulators having identical discs are different due to:

The voltages across various discs of suspension insulators having identical discs are different due to: 

(A) Surface leakage currents 

(B) Series capacitance of lines 

(C) Shunt capacitance to ground 

(D) Series and shunt capacitances
by

1 Answer

Answer :

The voltages across various discs of suspension insulators having identical discs are different due to: Shunt capacitance to ground 

by

Related questions

The number of insulator discs (each rated 11 kV) required in a suspension type insulator string

Description : The number of insulator discs (each rated 11 kV) required in a suspension type insulator string of 220 kV line is 

Last Answer : The number of insulator discs (each rated 11kV) required in a suspension type insulator string of 220 kV line is 16

Compare pin type and suspension insulators on given points: (i) Position of insulator on cross arm. (ii) Position of conductor on insulator. (iii) Reaction on cross arm. (iv) Possibility of flash over due to large birds (v) Maintenance/Replacement cost (vi) Maximum voltage level (vii) Effect on height of supporting structure. (viii) Life

Description : Compare pin type and suspension insulators on given points: (i) Position of insulator on cross arm. (ii) Position of conductor on insulator. (iii) Reaction on cross arm. (iv) Possibility of ... Replacement cost (vi) Maximum voltage level (vii) Effect on height of supporting structure. (viii) Life 

Last Answer : S.No  Points Pin Type insulator Suspension or Disc Type insulator 1 Position of insulator on cross arm It is fixed on top of cross arm by using galvanized steel pin. So it is ... so to maintain minimum ground clearance height of pole increase.  8 Life Less More

How many insulator disc used for 33 kV transmission voltage line?

Description : How many insulator disc used for 33 kV transmission voltage line?

Last Answer : 5,As 33kv is Vrms

List the properties of line insulators in brief

Description : List the properties of line insulators in brief

Last Answer : Following are the properties of line insulators:  A) Electrical Properties of insulating material:- 1. It should have high resistance. 2. It should have high breakdown voltage. 3. It should have high ... of insulating material:- 1. It should have longer life. 2. It should have low cost

Which have more free electrons: conductors or insulators?

Description : Which have more free electrons: conductors or insulators? 

Last Answer : Conductors have many free electrons whereas insulators have very few or none at all.

Name two good conductors, two good insulators, and two semiconductors.

Description : Name two good conductors, two good insulators, and two semiconductors.

Last Answer : In general all metals are good conductors, with silver the best and copper second.

Instantaneous Voltages

Description : Instantaneous Voltages

Last Answer : Instantaneous value: The value of an alternating quantity at a particular instant is called the instantaneous value of the quantity at that instant.  Maximum Value: The maximum or peak value ... an alternating quantity during a cycle is called the maximum value or amplitude of the quantity.

Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

Description : Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

Last Answer : Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

Alternating voltages and phasors (Problem 15)

Description : Alternating voltages and phasors (Problem 15)

Last Answer : Alternating voltages and phasors (Problem 15)

Alternating voltages and phasors (Problem 14)

Description : Alternating voltages and phasors (Problem 14)

Last Answer : Alternating voltages and phasors (Problem 14)

Alternating voltages and phasors (Problem 13)

Description : Alternating voltages and phasors (Problem 13)

Last Answer : Alternating voltages and phasors (Problem 13)

Alternating voltages and phasors (Problem 12)

Description : Alternating voltages and phasors (Problem 12)

Last Answer : Alternating voltages and phasors (Problem 12)

Alternating voltages and phasors (Problem 11)

Description : Alternating voltages and phasors (Problem 11)

Last Answer : Alternating voltages and phasors (Problem 11)

Alternating voltages and phasors (Problem 10)

Description : Alternating voltages and phasors (Problem 10)

Last Answer : Alternating voltages and phasors (Problem 10)

Alternating voltages and phasors (Problem 9)

Description : Alternating voltages and phasors (Problem 9)

Last Answer : Alternating voltages and phasors (Problem 9)

Alternating voltages and phasors (Problem 8)

Description : Alternating voltages and phasors (Problem 8)

Last Answer : Alternating voltages and phasors (Problem 8)

Alternating voltages and phasors (Problem 7)

Description : Alternating voltages and phasors (Problem 7)

Last Answer : Alternating voltages and phasors (Problem 7)

Alternating voltages and phasors (Problem 6)

Description : Alternating voltages and phasors (Problem 6)

Last Answer : Alternating voltages and phasors (Problem 6)

Alternating voltages and phasors (Problem 5)

Description : Alternating voltages and phasors (Problem 5)

Last Answer : Alternating voltages and phasors (Problem 5)

Alternating voltages and phasors (Problem 4)

Description : Alternating voltages and phasors (Problem 4)

Last Answer : Alternating voltages and phasors (Problem 4)

Alternating voltages and phasors phasor addition and division (Problem 3)

Description : Alternating voltages and phasors phasor addition and division (Problem 3)

Last Answer : Alternating voltages and phasors phasor addition and division (Problem 3)

Alternating voltages and phasors : phasor addition (Problem 2)

Description : Alternating voltages and phasors : phasor addition (Problem 2)

Last Answer : Alternating voltages and phasors : phasor addition (Problem 2)

Alternating voltages and phasors (Problem 1)

Description : Alternating voltages and phasors (Problem 1)

Last Answer : Alternating voltages and phasors (Problem 1)

Thyristor can be protected from over voltages by using

Description : Thyristor can be protected from over voltages by using

Last Answer : Thyristor can be protected from over voltages by using Voltage clamping device

A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :

Description : A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :  (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV

Last Answer : A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : lie between 66 kV and 110 kV

The sending end and receiving end voltages of a three-phase transmission line are 10 kV/ph and 9.5 kV/ph,

Description : 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

For cost and safety, the outdoor substations are installed for voltages above?

Last Answer : For cost and safety, the outdoor substations are installed for voltages above 33 kV.

Why transmission voltages are high?

Description : Why transmission voltages are high?

Last Answer : If current is high then I2R losses will be more .If I2R losses is more then heat generated is more. By heat or increasing temperature resistance will also be increase which will decrease ... voltage we are decreasing current which is advantageous. That's why transmission voltages is high.

_______are the materials having electrical conductivity much less than most of the metals but much greater...

Description : _______are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Last Answer : Semi-conductors are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Air Conditioning/ Electrical

Description : The coil of a transformer that is energized from a source of alternating voltage is known as the: A. low voltage winding B. high voltage winding C. primary winding D. secondary winding

Last Answer : C

Electricity or Air Conditioning

Description : There is a single-phase motor connected in parallel with an electric heater unit. If the heater is switched off, then the overall power factor angle of the circuit will: A. increase B. decrease C. stay the same D. none of the above

Last Answer : A

In a string of suspension insulators, the voltage distribution across...

Description : In a string of suspension insulators, the voltage distribution across the different units of a string could be made uniform by the use of a grading ring, because it?

Last Answer : In a string of suspension insulators, the voltage distribution across the different units of a string could be made uniform by the use of a grading ring, because it forms capacitances which help to cancel the charging current from link pins.

What are the most common insulators used for extremely high voltages?

Description : What are the most common insulators used for extremely high voltages?

Last Answer : Varnished cambric and oil-impregnated paper.

Pin type insulators are generally not used for voltages beyond (a) 1 kV (b) 11 kV (c) 22 kV (d) 33 kV

Description : Pin type insulators are generally not used for voltages beyond (a) 1 kV (b) 11 kV (c) 22 kV (d) 33 kV

Last Answer : (d) 33 kV

High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above

Description : High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above

Last Answer : (a) suspension insulators

High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above

Description : High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above

Last Answer : (a) suspension insulators

Two transformers of identical voltages but different capacities are operated in parallel, for satisfactory load sharing: a) Impedances should be equal b) Per unit impedance must be equal c) per unit impedance and X/R ratio must be equal d) Impedance and X/R ratio must be equal

Description : Two transformers of identical voltages but different capacities are operated in parallel, for satisfactory load sharing: a) Impedances should be equal b) Per unit impedance must be equal c) per unit impedance and X/R ratio must be equal d) Impedance and X/R ratio must be equal

Last Answer : Ans: C

The electrical diagram shown in the illustration shows _____________. EL-0021 A. 'R1', 'R2', and 'R3' are connected is series B. 'R1', 'R2', and 'R3' are connected in parallel C. the voltages measured across 'R1', 'R2' and 'R3' will be different if 'R1', 'R2' and 'R3' have different values D. the total resistance equals R1 + R2 + R3

Description : The electrical diagram shown in the illustration shows _____________. EL-0021 A. 'R1', 'R2', and 'R3' are connected is series B. 'R1', 'R2', and 'R3' are connected in parallel C. the voltages measured across ... if 'R1', 'R2' and 'R3' have different values D. the total resistance equals R1 + R2 + R3

Last Answer : Answer: B

Among the voltages to various electrodes in a CRT the voltage is the highest on

Last Answer : Among the voltages to various electrodes in a CRT the voltage is the highest on PD anode.

Which of the following statements is correct for the illustrated circuit? EL-0020 A. 'R1', 'R2', and 'R3' are connected in series. B. 'R1', 'R2', and 'R3' are connected in parallel. C. The voltages measured across 'R1', 'R2', and 'R3' are equal. D. The total resistance equals 1/R1 + 1/R2 + 1/R

Description : Which of the following statements is correct for the illustrated circuit? EL-0020 A. 'R1', 'R2', and 'R3' are connected in series. B. 'R1', 'R2', and 'R3' are connected in parallel. C. The voltages measured across 'R1', 'R2', and 'R3' are equal. D. The total resistance equals 1/R1 + 1/R2 + 1/R

Last Answer : Answer: A

Which of the following statements is true concerning simple parallel resistance circuits? A. The total current flow equals the sum of the individual currents. B. The total current flow equals the reciprocal of the sum of the individual currents. C. The total resistance equals the sum of the individual resistance. D. The total voltage equals the sum of the individual voltages across each resistance.

Description : Which of the following statements is true concerning simple parallel resistance circuits? A. The total current flow equals the sum of the individual currents. B. The total current flow equals the ... resistance. D. The total voltage equals the sum of the individual voltages across each resistance.

Last Answer : Answer: A

Which of the following statements concerning a simple parallel resistance circuit is correct? A. The voltage drop across each resistor is the same. B. The total current flow equals the reciprocal of the sum of the individual currents. C. The total resistance equals the sum of the individual resistances. D. The total voltage equals the sum of the individual voltages across each resistance.

Description : Which of the following statements concerning a simple parallel resistance circuit is correct? A. The voltage drop across each resistor is the same. B. The total current flow equals the reciprocal ... resistances. D. The total voltage equals the sum of the individual voltages across each resistance.

Last Answer : Answer: A

There are two cliffs. They are each attached by a suspension bridge that takes 5 minutes to walk across, and is the only way to get to the other side. No one is allowed to cross the bridge unless authorized. There is a guard on the other side that takes a nap every 5 minutes, then keeps watch for 5 minutes, takes a nap for 5 minutes, and so on. Let's say you don't have authorization. How would you get across (Remember, he wakes up EXACTLY after 5 minutes, meaning if you go on the bridge the second he takes a nap, and you cross the bridge, he'll wake up exactly when you reach the other side, and send you back)? -Riddles

Description : There are two cliffs. They are each attached by a suspension bridge that takes 5 minutes to walk across, and is the only way to get to the other side. No one is allowed to cross the bridge unless ... the bridge, he'll wake up exactly when you reach the other side, and send you back)? -Riddles

Last Answer : You can't go as he is awake, he'll see you, but go when he doesn't see you. Then, turn back as he is waking up, pretending to go to the side you came from. Then, he'll figure you are unauthorized to set foot on the bridge, and send you to the side you want to get to.

In an AC transmission line difference in phase of voltage at two ends of the line is due to

Description : In an AC transmission line difference in phase of voltage at two ends of the line is due to (a) System voltage (b) Insulators (c) Resistance of line (d) Reactance of line

Last Answer : reactance of line

Galloping in transmission line conductors arises generally due to

Description : Galloping in transmission line conductors arises generally due to - (A) asymmetrical layer of ice formation (B) vortex phenomenon in light winds (C) heavy weight of line conductors (D) adoption of horizontal conductor

Last Answer : D

Assertion : Two identical bulbs when connected across a battery, produce a total power P. When they are connected across the same battery in series to

Description : Assertion : Two identical bulbs when connected across a battery, produce a total power P. When they are connected across the same battery in series to

Last Answer : Assertion : Two identical bulbs when connected across a battery, produce a total power P. When they ... . If Assertion is false but Reason is true.

Ungrounded neutral transmission system is not recommended because of system (a) insulation being overstressed due to over voltages (b) insulation overstress may lead to failure and subsequent phase to phase faults (c) being inadequately protected against ground fault (d) all of the above

Description : Ungrounded neutral transmission system is not recommended because of system (a) insulation being overstressed due to over voltages (b) insulation overstress may lead to failure and subsequent phase to phase faults (c) being inadequately protected against ground fault (d) all of the above

Last Answer : (d) all of the above

What are different insulators used in substation

Description : What are different insulators used in substation

Last Answer : Different Insulators: Over head electrical conductors used for transmitting electric power is mostly bare and not covered with any insulation medium. The bare line conductors are ... Post insulators for support Stray arm insulators Shaft insulators Sectionalising insulators Connecting rod insulators