0
Add your answer:
Earn +20 pts
What can happen if a utility-sized electrical generator has an ungrounded neutral?
What you need to define is the statement "utility- sized electrical generator". It depends on what the generators output is used for as to the way it is internally wired. In some configurations there is no neutral to ground as in a Delta configuration.If the generator is configured for a Wye output and the neutral centre tap is not grounded there will be a floating voltage between the generator and the utility system ground. It is for this reason that the generator's neutral point is grounded to bring the floating voltage down to zero volts to ground.
What is a floating neutral wire?
a loose connection of a neutral wire
How many amps for 1010 KVA generator per phase?
To answer this question the voltage of the generator must be given.
Why is brushes placed at MNA in a dc generator?
to avoid sparking ,since their is no e.m.f induced in magnetic neutral axis.
Armature reaction in a DC generator?
ARMATURE REACTION in DC MachineAll current-carrying conductors produce magnetic fields. The magnetic field produced by current in the armature of a dc generator affects the flux pattern and distorts the main field. This distortion causes a shift in the neutral plane, which affects commutation. This change in the neutral plane and the reaction of the magnetic field is called armature reaction.
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.
What can happen if a utility-sized electrical generator has an ungrounded neutral?
What you need to define is the statement "utility- sized electrical generator". It depends on what the generators output is used for as to the way it is internally wired. In some configurations there is no neutral to ground as in a Delta configuration.If the generator is configured for a Wye output and the neutral centre tap is not grounded there will be a floating voltage between the generator and the utility system ground. It is for this reason that the generator's neutral point is grounded to bring the floating voltage down to zero volts to ground.
What is a floating neutral wire?
a loose connection of a neutral wire
How do you identify that in the system the neutral is floating or not?
do a continuity test between the neutral and the metal enclosure of the equipment containing the neutral. infinity reading [ open line ] indicates floating neutral. Steve sorensen jr
What does system floating mean in reference to portable generators?
There is no path to ground. IE: You need to ground the generator using a ground rod.
Why floating neutral in a three phase supply is undesirable?
Floating neutral in 3 phase supply is undesirable as if the same thing occurs then there will be bad effect for all single phase equipment which we are using as phase to neutral voltage will exceed from its normal value and it will harm the equipments.
What is the difference between a floating output signal generator and a grounded output signal generator?
A signal generator can be used to function in two ways. In high frequencies, one of output probes of any generator (negative probe) will be grounded automatically, hence it has to be connected with grounded parts of other elements not to create a short circuit problem. But, in the case of floating type (f<100 Hz, generally) probes of the signal generator is not grounded.
What is potential between neutral and earth in a single phase generator?
It should be zero.
What does the term floating neutral mean?
This could mean a couple of different things. At some point in the power distribution system, the neutral bus is normally tied to the ground bus. If the neutral is not grounded, this could be called a floating neutral. More often, the term is used to describe a load, such as a light fixture or motor where the neutral wire has accidentally not been connected. The hot wire is live, but the device does not function. The neutral wire normally provides the return path for current to flow. This is a very dangerous situation. The live voltage flows from the hot wire, through the load, then into the neutral wire. If the neutral is not connected (grounded), it becomes hot! Everyone knows the hot wire can bite you, but we normally expect the neutral to be dead. We may carelessly handle the neutral, thinking it is dead, but if it is floating (unconnected), it could be live. Many people have been killed in this fashion. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
Is current from a generator flows through the phase line and return through neutral to generator?
Yes, except that the correct term is 'line' conductor, not a 'phase' conductor.
Why neutral grounding transformer is connected to generator?
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
Voltage across Neutral and earth for a 3 phase auto transformer?
A grounded neutral will be at earth potential. A floating neutral will be at a voltage dependent upon the voltage imbalance between phases, and the design of the transformer.
