What type of earthing is used by transmission lines?

What type of earthing is used by transmission lines?
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2 Answers

Answer :

Strip earthing type of earthing is used by transmission lines.

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Answer :

Preventive  multiple  earthing  PME.

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Related questions

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Last Answer : 25 mm x 4 mm is the dimension of the copper strips used for the strip earthing.

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Description : From the point of view of safety, the resistance of earthing electrode should be   (a) Low (b) High (c) Medium (d) The value of resistance of earth does not affect the safety 

Last Answer : A

What happens insulators when high voltage passes through transmission lines whether it breaks or lose it's insulating property?

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Why are overhead transmission lines not insulated?

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Last Answer : Bundled conductors are mainly used in high voltage overhead transmission lines to Reduce corona 

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Description : Transmission lines are transposed to : (A) Reduce copper loss (B) Reduce skin effect (C) Prevent interference with neighbouring telephone lines (D) Prevent short-circuit between any two lines

Last Answer : a

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Last Answer :  Transmission lines connect: - Generating station to a switching station / step down transformer station 

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Last Answer : Hollow conductors are used in the transmission lines to: Reduce corona loss.

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Last Answer : Copper conductors are generally used for transmission lines because it has longer life and high conductivity.

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Last Answer : The transmission lines which feed different sub-stations represent primary distribution.

How transmission lines are classified?

Last Answer : On the basis of distance from generating station to distributers

Why do transmission lines use high voltage?

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Describe with neat sketch any one type of earthing system.

Description : Describe with neat sketch any one type of earthing system. 

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Last Answer : The wire that connects the earth continuity wire and the earth electrode is called the earthing lead.

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Last Answer : Sheet earthing is done in hilly areas. Shit electrodes are placed by digging trenches on the slopes of the hill.

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Description : What should be the size of rod earthing ?

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Last Answer : Rod earthing is the least expensive. Because the soil does not have to be eroded, the cost is less than other earthing.

How many types of earthing and what are they ?

Description : How many types of earthing and what are they ?

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What is the best earthing method ?

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What is the color coding of earthing wire ?

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Why we do 2 types of earthing on transformer i.e.: body earthing & neutral earthing, what is function. I am going to install a 5oo kva transformer & 380 kva DG set what should the earthing value?

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Description : Explain types of Earthing.

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What is different between resistance grounding system and resistance earthing system?

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Description : Why is earthing desirable for electric appliances?

Last Answer : Ans: Earthing helps the current move into the earth in the event of short-circuit, without giving a shock to the user.

What is difference between earthing and grounding?

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How many earthing should be done for motors? Why?

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Why the neutral is earthed through earthing resistance in case of UT and SUT?

Description : Why the neutral is earthed through earthing resistance in case of UT and SUT? 

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Why the earthing transformer primary voltage is 16.5 kV rated in main generator even though actual voltage during the E/F is root 3 times less?

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How main generator earthing is done?

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Last Answer : Generator neutral earthing is done through transformer and earth fault current is limited through resistance, which is connected across the secondary of the transformer. Generator 16.5 kV earth fault current is isolated from 220 kV through GT. Only star point of the generator is grounded. 

What is the purpose of shaft earthing and bearing insulation?

Description : What is the purpose of shaft earthing and bearing insulation?

Last Answer : The voltage generated in the shaft due to the leakage fluxes can circulate current through the shaft. If shaft earthing is not done the leakage current will flow through the bearings to ground and pitting of bearings will result. Hence bearing foundation and pipelines are insulated. 

Why shaft-earthing brush is different from normal brush?

Description : Why shaft-earthing brush is different from normal brush?

Last Answer : The contact resistance should be very low for shaft earthing brush, to prevent even small current through the oil film, so used copper magnite brush or silver carbon brush.