What is corona?

What is corona?
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1 Answer

Answer :

The phenomenon of violet glow, hissing noise and production of ozone gas in an overhead transmission line is known as corona.
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Related questions

How can we reduce the effect of corona?

Description : How can we reduce the effect of corona?

Last Answer : 1. By increasing conductor size: By increasing conductor size, the voltage at which corona occurs is raised and hence corona effects are considerably reduced. 2. By increasing conductor spacing: ... , the voltage at which corona occurs is raised and hence corona effects can be eliminated.

What are the various types of tariff?

Description : What are the various types of tariff?

Last Answer : 1. Simple tariff 2. Flat rate tariff 3. Block rate tariff 4. Two-part tariff 5. Maximum demand tariff 6. Power factor tariff 7. Three-part tariff

What is tariff?

Description : What is tariff?

Last Answer : The rate at which electrical energy is supplied to a consumer is known as tariff. The tariff should include the following items: (i) Recovery of cost of producing electrical energy at the power ... of cost of operation and maintenance of supply (iv) A suitable profit on the capital investment.

What is meant by Sag?

Description : What is meant by Sag?

Last Answer : The difference in level between points of supports and the lowest point on the conductor is called sag.

What is difference between fuse and breaker?

Description : What is difference between fuse and breaker?

Last Answer : A: (i) Fuse performs both detection and interruption functions. Circuit breaker performs interruption function only. The detection of fault is made by relay system. (ii) The breaking capacity of ... , replacement is required in the fuse. In case of circuit breaker, replacement is not required.

Which type of motor is used in trains, what is the rating of supply used?

Description : Which type of motor is used in trains, what is the rating of supply used?

Last Answer : A:Dc series is in the trains to get high starting torque while starting of the trains and operating voltage is 1500v dc.

Why we use ac system in India why not dc ?

Description : Why we use ac system in India why not dc ?

Last Answer : A:Firstly, the output of power stations comes from a rotary turbine, which by it's nature is AC and therefore requires no power electronics to convert to DC. Secondly it is much easier to ... the sine wave current will naturally tend to zero at some point making the current easier to interrupt.

Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv ?

Description : Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv ?

Last Answer : A:Transformer Induced voltage equation contains 4.44 factor. E -Induced emf per phase T -number of turns f -frequency Φ -maximum flux per pole From the equation we see that E is proportional to 4.4 and it is in turn multiple of 11.So always transmission voltage is multiple of 11

When we connect the large capacitor bank in series ?

Description : When we connect the large capacitor bank in series ?

Last Answer : A :we connect large capacitor bank in series to improve the voltage power supply at the load end in balanced transmission line when there is considerable voltage drop along the balanced transmission line due ... - %6 )of the rated high terminal voltage )the large capacitor bank is used in series.

What is reverse power relay?

Description : What is reverse power relay?

Last Answer : A:Reverse Power flow relay are used in generating stations's protection. A generating stations is supposed to fed power to the grid and in case generating units are off,there is no generation in the ... power from grid. To stop the flow of power from grid to generator we use reverse power relay.

What is the difference between over voltage relay and over current relay?

Description : What is the difference between over voltage relay and over current relay?

Last Answer : A:The current increases not only for over voltages but also for under voltage(As most of the loads are non-linear in nature). So,the over voltage protection & over current protection are completely ... , for a better protection of the system.It should have both over voltage & over current relay.

What is derating?

Description : What is derating?

Last Answer : A:The current currying of cables will change depending upon the site temperature (location of site), type of run (it will run through duct, trench, buried etc.), number of tray, depth ... of cable reduce than current currying capacity (which given to cable Catalogue) this is called derating.

Define IDMT relay?

Description : Define IDMT relay?

Last Answer : It is an Inverse Definite Minimum Time relay. In IDMT relay its operating is inversely proportional and also a characteristic of minimum time after which this relay operates. It is inverse in the sense; the tripping time will decrease as the magnitude of fault current increase.

Where should the lighting arrestor be placed in distribution lines?

Description : Where should the lighting arrestor be placed in distribution lines?

Last Answer : A:Near distribution transformers and out going feeders of 11kv and incomming feeder of 33kv and near power transformers in sub-stations.

What is the difference between MCB & MCCB, Where it can be used?

Description : What is the difference between MCB & MCCB, Where it can be used?

Last Answer : A: MCB is miniature circuit breaker which is thermal operated for overload condition and magnetically operated for short circuit protection. It is available in small current rating. MCCB is moulded case ... frequency may be inbuilt. Normally it is used where normal current is more than 100 A.

Explain types of Earthing.

Description : Explain types of Earthing.

Last Answer : A:The two types of earthing are Equipment earthing and system earthing. In Equipment earthing: body ( non conducting part) of the equipment should be earthed to safegaurd the human beings ... . This type of earthing is further classified into directly earthed, Impedance earthing, resistive earthing.

What is Ferranti effect?

Description : What is Ferranti effect?

Last Answer : A: When receiving end voltage is greater than the sending end voltage.

What is buchholz relay and the significance of it in to the transformer?

Description : What is buchholz relay and the significance of it in to the transformer?

Last Answer : A:Buchholz relay is a gas based relay which is used for the protection of transformer from its internal faults. whenever any internal fault occurs in a transformer, the buchholz relay at once gives an ... then it stop its sound itself other wise it trips the circuit by its own tripping mechanism.

What is the difference between Isolator and Circuit Breaker?

Description : What is the difference between Isolator and Circuit Breaker?

Last Answer : A: Isolator is a off load device which is used for isolating the downstream circuits from upstream circuits for the reason of any maintenance on downstream circuits. it is manually operated ... specification 1) rated current 2) short circuit breaking capacity and 3) Instantaneous tripping current.

what is power factor? whether it should be high or low? why?

Description : what is power factor? whether it should be high or low? why?

Last Answer : A:Power factor is the ratio of true power to apparent power. It has to be ideally 1. If it is too low then cable over heating & equipment overloading will occur. if it is greater than 1 then load will ... : 0.95 to meet actual power, load has to draw less current(V constant),result in less losses).

Explain the working principle of the circuit breaker

Description : Explain the working principle of the circuit breaker

Last Answer : A:Circuit Breaker is one which makes or breaks the circuit.It has two contacts namely fixed contact & moving contact. Under normal condition the moving contact comes in contact with fixed contact thereby forming ... . Arc is extinguished by the Arc Quenching media like air, oil, vacuum, SF6 gas etc.

What is the difference between surge arrestor and lightning arrestor?

Description : What is the difference between surge arrestor and lightning arrestor?

Last Answer : A:Lightning Arrestor is installed outside and the effect of lightning is grounded where as surge arrestor installed inside panels comprising of resistors which consumes the energy and nullify the effect of surge.

Why we use Vacuum Circuit Breaker in High Transmission System and not Air Circuit Breaker?

Description : Why we use Vacuum Circuit Breaker in High Transmission System and not Air Circuit Breaker?

Last Answer : A:Vacuum has high arc quenching property compare to air . The dielectric strength of vacuum is equal to 8 times than air . Hence vacuum circuit breaker is used in High voltage line and air circuit breaker is used in low voltage lines.

Why syn. generators are used for the production of electricity?

Description : Why syn. generators are used for the production of electricity?

Last Answer : A:synchronous machines have capability to work on different power factor. Hence syn. generators are used for the production of electricity.

What will happen when power factor is leading in distribution of power?

Description : What will happen when power factor is leading in distribution of power?

Last Answer : A:If their is high power factor, i.e if the power factor is close to one: 1.losses in form of heat will be reduced, 2.cable becomes less bulky and easy to carry, and very cheap to afford, & 3. it also reduces over heating of transformers.

what is ACSR cable and where we use it?

Description : what is ACSR cable and where we use it?

Last Answer : A: ACSR means Aluminium conductor steel reinforced, this conductor is used in transmission & distribution.

Describe the operation carried out in Thermal power stations?

Description : Describe the operation carried out in Thermal power stations?

Last Answer : A:The water is boiled in the boiler with the help of coal. This generates steam. This steam is allowed to hit the turbine hence the turbine rotates. The turbine is coupled with generator. So the mechanical energy of turbine is converted to electrical energy by Generator.

What is "pu" in electrical engineering?

Description : What is "pu" in electrical engineering?

Last Answer : PU stands for per unit and this will be used in power system single line diagram there it is like a huge electrical circuit with no of components (generators, transformers, loads) with different ratings (in ... into this basis. Those values are called as pu values. (p.u=actual value/base value).

What is Electric traction?

Description : What is Electric traction?

Last Answer : A:Electric traction means using the electric power for traction system to drive the locomotives.

What is meant by synchronous condenser?

Description : What is meant by synchronous condenser?

Last Answer : An over excited synchronous motor running on no load is known as synchronous condenser. It is used to improve the power factor of the system.

What is the significance of Corona rings in substations?

Description : What is the significance of Corona rings in substations?

Last Answer : It is observed that corona discharge occurs mostly at sharp corners, edges near the conductor fixing points. Corona rings also called grading rings are hallow metallic rings having large diameter ... is reduced to much lower value Corona discharge is eliminated Dust deposition is also minimized

What are the disadvantages of corona?

Description : What are the disadvantages of corona?

Last Answer : Some of the disadvantages of corona are: Corona causes power loss Corona causes unacceptable noise Corona cause radio interference

How come homeless shelters do not have Corona testing sites to admit homeless people who are Corona free?

Description : How come homeless shelters do not have Corona testing sites to admit homeless people who are Corona free?

Last Answer : My state has multiple sites for FREE testing! Where are you ?

Was the Corona epidemic good for the climate?

Description : Was the Corona epidemic good for the climate?

Last Answer : I don’t know, but I heard that people in India threw dead people into the river because they couldn’t deal with all the dead body. That doesn’t look good for the environment.

With the 20/21 flu season nearly eradicated, what currently employed anti-corona measures would you support as mandatory during future flu seasons?

Description : With the 20/21 flu season nearly eradicated, what currently employed anti-corona measures would you support as mandatory during future flu seasons?

Last Answer : I would not mind if they made mask wearing mandatory for the entire flu season. Along with that, they should keep up the cleaning in all businesses like wiping down grocery carts every time they come in.

What is corona? Give examples. -Biology

Description : What is corona? Give examples. -Biology

Last Answer : answer:

how fat are you and you will die in 23/04/2021 by corona because you have dibities?

Description : how fat are you and you will die in 23/04/2021 by corona because you have dibities?

Last Answer : youw david or shela or alex or morgan or lusy or hamid or isa or muhamed or mustafa or dany..... are you turcish

If we somehow mix the genes of a corona-immune creature and a phage and make it attack a virus instead of a bacteria then it sall be a cure won't it please tell me if there is any hole in my plan.-Nithesh.K?

Description : If we somehow mix the genes of a corona-immune creature and a phage and make it attack a virus instead of a bacteria then it sall be a cure won't it please tell me if there is any hole in my plan.-Nithesh.K?

Last Answer : *shall and no question mark at the end..

What is Corona Virus Impacts On Dental Practice And Potential Salivary Identification?

Description : What is Corona Virus Impacts On Dental Practice And Potential Salivary Identification?

Last Answer : A global public health emergency is the current outbreak of the 2019 novel coronavirus strain (COVID-19) [1]. This infectious disease epidemic, which involves fever, inflammation, acute respiratory ... mild, either a Severe ARS-CoV or the Middle East Respiratory Syndrome Coronavirus (MERS-CoV

what do you think about corona?

Description : what do you think about corona?

Last Answer : ew

have any vaccine of corona pandemic covid-19.?

Description : have any vaccine of corona pandemic covid-19.?

Last Answer : I don't believe you should because there is a chance that a covid vaccine can kill you and give you covid. I would avoid getting the vaccine instead you should just wear a mask when going to any public places and try to keep a six feet distance remember if you do this you are saving lives.

Where does the word corona originate from ?

Description : Where does the word corona originate from ?

Last Answer : As far as I know, the word "compassion" originated in China

Which country is the first in terms of deaths and injuries in Corona ?

Description : Which country is the first in terms of deaths and injuries in Corona ?

Last Answer : America is currently at No. 1

How many people have died of Novel Corona virus in Bangladesh so far ?

Description : How many people have died of Novel Corona virus in Bangladesh so far ?

Last Answer : Novel corona virus has killed 101 people in Bangladesh so far. Data source ATN news .... Corona Update 20/04/2020 Total number of deaths - 101 people. The total number of infected people is 2946.

Want to know which countries in the world have been infected with Corona virus ?

Description : Want to know which countries in the world have been infected with Corona virus ?

Last Answer : Then you have an answer Browse you ( www.worldometer.com) Number of infected , which countries affected , daily updates , all given according to serial . Thanks

How to know how many people are infected with Corona virus ?

Description : How to know how many people are infected with Corona virus ?

Last Answer : You can visit www.Crona.Gov.Bd on this web site.

What is Corona Update (18/04/2020) in Bangladesh ?

Description : What is Corona Update (18/04/2020) in Bangladesh ?

Last Answer : In the last 24 hours, 306 people have been infected with Kovid-19 in Bangladesh. Nine people have died during this period. With this, a total of 2144 people were affected in the country ... various laboratories. On April 17, the health authorities of Bangladesh declared the whole country at risk.

If you die after being infected with Corona virus, you will get the status of a martyr .

Description : If you die after being infected with Corona virus, you will get the status of a martyr .

Last Answer : If a believer dies only after being infected with the corona virus, he will get the status of a martyr. No infidel mushrik will get the status of a martyr. Narrated Anas Ibn Malik: The Prophet (peace ... pregnancy is also a martyr. (Sunan Abu Dawood (Ifah) , Hadith number: 3096 Hadith manah sahih).

Has India Really Made Corona Revenge ? Say yes or no ? Don't get sick

Description : Has India Really Made Corona Revenge ? Say yes or no ? Don't get sick

Last Answer : India has developed a coroner's vengeance. But it is still not suitable for human application. After making a single medicine, it is tested for its benefits through various tests. And for this it will take 18 months to come to the vengeful market.

How many people are affected by Corona in Bangladesh ?

Description : How many people are affected by Corona in Bangladesh ?

Last Answer : The number of coronaviruses in Bangladesh is 164. And 18 deaths. Information ATN NEWS