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Why ACSR conductor is used for overhead lines?

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It has high tensile strength 
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Description :

State properties of conductor material used for overhead conductor. 

Answer :

Following are the properties of conductor material:-   1. High conductivity :- Material should have high conductivity 2. High mechanical strength:- Material should have sufficiently high mechanical strength ... available & less costly. 9. Scrap Value: - Material should have high scrap value. 

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86 views 1 answer
Description :

Why are overhead transmission lines not insulated?

Answer :

Insulators are useful to help separate electrical conductors when they come into physical contact. Overhead Transmission Lines Are Not Insulated: The overhead transmission line is carrying extreme high voltage and ... a whole lot of thick insulation to absorb the heat produced by such high voltage.

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126 views 7 answers
Description :

A 3 layer, total diameter of an ACSR conductor is 5 cm. Find the diameter of each strand?

Answer :

A 3 layer, total diameter of an ACSR conductor is 5 cm. Find the diameter of each strand? 1 cm

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1.2k views 1 answer
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

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

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114 views 1 answer
Description :

Answer :

Overhead lines for power supply to tramcars are at a minimum height of 10 m.

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2.5k views 1 answer
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Description :

What is the full form of ACSR?

Answer :

Aluminum conductor steel rainforce

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279 views 2 answers
Description :

Answer :

Overhead system can be designed for operation up to 400 kV.

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193 views 1 answer
Description :

Answer :

Series capacitors on transmission lines are of little use when the load VAR requirement is small.

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154 views 1 answer
Description :

Why underground service connections are service connections are costly than overhead service connection

Answer :

Reason: Underground service connection is given by underground cable. This cable is costly than bare conductor. Sometimes cable trench is required for cable laying, which requires additional cost. So underground service connections are costly than overhead service connection.

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93 views 1 answer
Description :

Answer :

When a conductor carries more current on the surface as compared to core, it is due to skin effect.

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124 views 1 answer
Description :

Is Aluminium a good conductor of electricity?

Answer :

Yes aluminium is a conductor and it is a good conductor of electricity. But copper have better conductivity as compare to aluminium.

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112 views 1 answer
Description :

The function of steel wire in ACSR conductors is (A) To take care of surges. (B) To reduce corona. (C) To reduce inductance. (D) To provide additional mechanical strength

Answer :

The function of steel wire in ACSR conductors is To provide additional mechanical strength

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3.4k views 1 answer
Description :

what is ACSR ?

Answer :

Aluminium Conductor Steel Reinforced

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107 views 1 answer
Description :

Why don't we burry power lines underground ?

Answer :

Because conductor used for power transmission are not insulated and if we do so it create phase to ground fault causing interruptions to supply.

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86 views 5 answers
Description :

Differentiate between overhead transmission and underground transmission.

Answer :

Points Overhead line  Underground cable Capital cost  Less More Erecting cost  Less More Time require for completion of work Less More Flexibility More ... Space consumed Space consumed  No space consumed Appearance Not good  Very good 

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41 views 1 answer
Description :

Define service connection and state types connection and state types of overhead service connection

Answer :

Service Connection:- It is the input conductor or wire which is carried out from supply company (authorities) pole to consumers' main board or premises. Types of overhead service ...  1. Overhead service connection with Bare conductor 2. Overhead service connection with weather proof cable  

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146 views 1 answer
Description :

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

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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71 views 1 answer
Description :

Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.

Answer :

Magnetic linens of force is the imaginary lines for magnetic field of magnet around it. These magnetic lines of forces are introduced by Michael Faraday. The direction of lines of force is from N-pole to S-pole. The figure shows lines of force for bar type magnet.

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85 views 1 answer
Description :

State the effects of low power factor on efficiency and voltage regulation of short transmission lines. 

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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110 views 1 answer
Description :

State the classification of transmission lines depending on length of transmission lines. 

Answer :

A) According to Voltage level: ( 2 Marks)  a) High voltage Transmission Line (HV) up to 33 KV  b) Extra High Voltage Transmission Line (EHV) above 33 KV up to 400 KV  c) Ultra ... Transmission Line: - The length of Long transmission Line is above 200KM and its line voltage is above 100KV

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Description :

Find out number of data lines required to interface 16 LEDs arrange in the 4 x 4 matrix form.

Answer :

4+4=8, eight lines are required for 4x4 matrix of 16 LEDs

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66 views 1 answer
Description :

Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.

Answer :

Magnetic Lines of force- These are the imaginary lines (having no physical existence) introduced by Faraday for the pictorial representation of the distribution of a magnetic field.  OR  A line of ... that the tangent at any point gives direction of the resultant force at that point. 

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68 views 1 answer
Description :

In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Answer :

In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

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463 views 1 answer
Description :

The purpose of guard ring in transmission lines is to  (1) reduce the earth capacitance of the lowest unit. (2) increase the earth capacitance of the lowest unit. (3) reduce the transmission lines losses. (4) reduce the reactance of the line

Answer :

The purpose of guard ring in transmission lines is to reduce the earth capacitance of the lowest unit.

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1.4k views 1 answer
Description :

In tuned power lines, on load :  (A) the receiving end voltage is numerically equal to the sending end voltage  (B) the receiving end current is numerically equal to the sending end current  (C) there is no voltage drop  (D) all the above

Answer :

In tuned power lines, on load :  (A) the receiving end voltage is numerically equal to the sending end voltage  (B) the receiving end current is numerically equal to the sending end current  (C) there is no voltage drop  (D) all the above

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Description :

Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

Answer :

Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative ... A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

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Description :

Corona loss in transmission lines can be reduced by (A) using small diameter conductors (B) using bundled conductors (C) using less spacing between conductors (D) increasing the transmission line voltage

Answer :

Corona loss in transmission lines can be reduced by using bundled conductors

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Description :

If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19

Answer :

If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.

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2.9k views 1 answer
Description :

What is a safe distance from power lines?

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75 views 0 answers
Description :

How many volts are in the power lines?

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80 views 0 answers
Description :

Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.

Answer :

Parts Insulating Materials  Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils.  ... Transformer bushings Porcelain  Insulation between transmission line and pole. Porcelain

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78 views 1 answer
Description :

Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties. 

Answer :

Following are requirements of conductor:- i) High conductivity :  Material should have high conductivity, So that * cross section of conductor (size) reduces, * Copper losses reduces, * So Efficiency ... . Boiling point is 1820°C 9. Specific gravity is 2.7 10. High resistance to corrosion. 

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Description :

Answer :

Which allows the flow electrons 

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Description :

reasons the transposition of conductor

Answer :

Following reasons the transposition of conductor:  1. Due transposition of conductor inductance of each line is same LA = LB = LC, So drop due to inductive reactance in each line is same so ... interferences are less due to transposition.  Figure of transposition of conductor: 

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63 views 1 answer
Description :

What is difference between Conductor and insulator ?

Answer :

Conductor is a material that offers no resistance to the flow of current, while an insulator is a material that offers total resistance to the flows of current, It doesn't allowed any flows of current.

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52 views 1 answer
Description :

What is the difference between a cable and a conductor?

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Description :

Which is the best conductor: silver, carbon, or iron?

Answer :

Silver is the best conductor. Carbon is the semiconductor. Iron have less conductance as compared to silver.

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61 views 1 answer
Description :

How does the resistance of a conductor compare to that of an insulator?

Answer :

The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.

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2.6k views 1 answer
Description :

In a metal conductor, what is a free electron?

Answer :

 When many atoms are close together in a copper wire, the outermost orbital electron of each copper atom can easily break free from its home or parent atom. These electrons then can migrate easily ... random. Such electrons that can move freely from one atom to the next are called free electrons.

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Description :

lf the wire which is vertical to this page has electron flow downwards the conductor will have

Answer :

lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper

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156 views 1 answer
Description :

When electric current passes through a metallic conductor, its temperature rises. This is due to?

Answer :

When electric current passes through a metallic conductor, its temperature rises. This is due to collisions between conduction electrons and atoms.

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90 views 1 answer
Description :

The thickness of insulation provided on the conductor depends on?

Answer :

The thickness of insulation provided on the conductor depends on the magnitude of voltage on the conductor.

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187 views 1 answer
Description :

The insulation on a current carrying conductor is provided?

Answer :

The insulation on a current carrying conductor is provided to prevent leakage of current, to prevent shock.

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145 views 1 answer
Description :

Heat in a conductor is produced on the passage of electric current due to?

Answer :

Heat  in  a   conductor  is  produced   due  to  frictional  collision  of  electrons   flow  as  they  conduct  current.

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200 views 1 answer
Description :

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?

Answer :

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.

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175 views 1 answer
Description :

The resistance of a few meters of wire conductor in closed electrical circuit is?

Answer :

The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.

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152 views 1 answer
Description :

Current velocity through a copper conductor is

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Description :

The resistance of a conductor varies inversely as?

Answer :

The resistance of a conductor varies inversely as area of cross-section.

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81 views 1 answer
Description :

Answer :

If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.

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174 views 1 answer
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