0
hi...
to determine the high fault current when the short circuit done at the output terminal of the generator...
more information check any book of power element analysis and chapter (three phase fault at unloaded generator)...
with my Greetings
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoDear engineers,
I am in a fix to decide where should isolated neutral be preferred & where it is not recommended to ground the neutral. There is already a Gas turbine installed which is recommended to run on isolated neutral by manufacturer. but on the other hand, it is recommended to ground the neutral of steam turbine. what may be the logic behind it?
Thanking in advance :)
Wiki User
∙ 14y agoTo create a neutral in the supply feed for lighting and other supply needing a neutral a neutral needs to be married at the source and divorced at the supply
Add your answer:
Earn +20 pts
What is a difference between neutral earthing and body earthing?
here is no major difference between earthing and Grounding, both means "Connecting an electrical circuit or device to the Earth". This serves various purposes like to drain away unwanted currents, to provide a reference voltage for circuits needing one, to lead lightning away from delicate equipment. Even though there is a micro difference between grounding & earthing.Earthing and Grounding both is refer to zero potential but the system connected to zero potential is differ than Equipment connected to zero potential .If a neutral point of a generator or transformer is connected to zero potential then it is known as grounding. At the same time if the body of the transformer or generator is connected to zero potential then it is known as earthing.
How do you earth in the 1600 kva transformer?
In 1600 kva transformer we provide NGR (Neutral grounding resistance)
How do you avoid floating neutral?
The neutral of a generator should never get into a condition where is is floating. All generators have the neutral tied to the frame of the generator set. It comes this way from the manufacturer. If it is floating then someone has disconnected the neutral wire from the frame. Just reconnect the neutral to the generator frame again to stop it from floating. Larger generators should also have a ground rod connected to the generator frame for grounding purposes.
On a stup down transformer what does the xo symbol mean?
On a step down transformer XO symbol denotes the secondary split phase grounding point. This is also where the neutral of the three wire secondary is connected. The transformer connection is known as a single phase - three wire - with one secondary winding.
What is the difference between ground and floating neutral in your electric panel?
Neutral is vital to complete the cicuit. Ground is vital to carry the current to earth during a malfuntion of the appliance using power to drive it, should the current come in contact with the frame or outer covering of the appliance and endangering the users life.
Whether neutral grounding of generator transformer should be connected to grid earth mat?
yes it will have a local power uses then we can use it with separate earth pits and else cases i.e. if you are transforming power throgh Step up transformer then separete grounding transformer is required for NG. hope the above will clezar the doubts Regards K. Vithal
What is a difference between neutral earthing and body earthing?
here is no major difference between earthing and Grounding, both means "Connecting an electrical circuit or device to the Earth". This serves various purposes like to drain away unwanted currents, to provide a reference voltage for circuits needing one, to lead lightning away from delicate equipment. Even though there is a micro difference between grounding & earthing.Earthing and Grounding both is refer to zero potential but the system connected to zero potential is differ than Equipment connected to zero potential .If a neutral point of a generator or transformer is connected to zero potential then it is known as grounding. At the same time if the body of the transformer or generator is connected to zero potential then it is known as earthing.
How does the NGT works?
NGT means Neutral Grounding Transformer. It is Connected between TRF star point and earth point. It is protect the trf from short ckt .
How do you earth in the 1600 kva transformer?
In 1600 kva transformer we provide NGR (Neutral grounding resistance)
How do you avoid floating neutral?
The neutral of a generator should never get into a condition where is is floating. All generators have the neutral tied to the frame of the generator set. It comes this way from the manufacturer. If it is floating then someone has disconnected the neutral wire from the frame. Just reconnect the neutral to the generator frame again to stop it from floating. Larger generators should also have a ground rod connected to the generator frame for grounding purposes.
On a stup down transformer what does the xo symbol mean?
On a step down transformer XO symbol denotes the secondary split phase grounding point. This is also where the neutral of the three wire secondary is connected. The transformer connection is known as a single phase - three wire - with one secondary winding.
How do you Ground a 3 wire service?
If you do not have a underground metal water pipe coming into the building then you put a ground rod at least 2 feet from the buildingf into the ground attach one end of the wire to ground rod run your ground wire and attach the other end to the neautral bar in the panel box. You need special transformer called as grounding transformer for this purpose. Grounding transformer is basically Wye-Delta type transformer with Wye connected winding connected to 3 line wires and derived neutral from Wye side grounded through desired grounding device. Delta side winding of grounding transformer is kept at no load.
What is an Earthed voltage transformer?
An earthing transformer provides a neutral in a delta connected system.
What is meant by neutral grounding reactor?
Neutral-earthing reactors or Neutral grounding reactors are connected between the neutral of a power system and earth to limit the line-to-earth current to a desired value under system earth fault conditions.
Why and how is reactance grounding done?
Reactance grounding is done to lower ground fault current amounts, often to protect generators. It's done by tying the neutral of a generator to a grounding reactor (the other side of the reactor is tied to ground).
What is the difference between ground and floating neutral in your electric panel?
Neutral is vital to complete the cicuit. Ground is vital to carry the current to earth during a malfuntion of the appliance using power to drive it, should the current come in contact with the frame or outer covering of the appliance and endangering the users life.
Can you connect a 30 amp generator to a 20 amp transfer panel?
Yes, as long as there is fusing between the generator and the transfer panel. This fuse can be no larger than 20 amps. Without this fuse the load that the transfer panel is handling could go as high as the generator output (30 amps) which is a current that the transfer panel is not rated for.
