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if a generator is overexcited it is producing a large amount of reactive power which requires an increase in the alternator emf. To produce this emf, the rotor currents must increase resulting in extreme ohmic rotor losses.
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What happen when you reverse the direction of rotation in a separately excited dc generator?
When reverse the direction of a seperately excited DC generator,only polarities has been reversed,i.e., (+) becomes (-) and (-) become (+).
What happen if a prime mover fails when two generators are in parallel?
It acts as synchronous motor by consuming power from the other generator....
What will happen if 2 phase load is connected to generator?
There is no such thing as a two phase load any more. Any two legs from a three phase system are classed as single phase. If this single phase load is connected across the generator it will induce an imbalance in the output voltages of the generator. This is one reason that single phase loads on a three phase generator should be shifted around to find the best possible balance.
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 are the causes of failure of d.c shunt generator to excite?
no residual magnetism in the stator. this can happen with an overload which will occasionally even reverse the output polarity
How to use overexcited in a sentence?
Lilly gets overexcited easily and then she can't sleep.
What is going to happen when you repeat this experiment on self DC generator?
What is going to happen when you repeat this experiment on self D.C generator?
What is an advantage of a tidal generator over a wind generator?
Tides happen with predictable regularity.
When synchronus generator is supplying active and reactive power it is operating at leading or lagging power factor?
A synchronous generator is operating at lagging power factor (positive P & Q) when it is supplying P & Q to the system. P & Q are positive which means that they are flowing away from the bus where the generator is connected (overexcited case). On the other hand, it is operating at leading power factor when it is supplying P and absorbing Q. The sign of Q is negative which means that it is flowing towards the generator bus (underexcited case).
What will happen of you give AC supply to stator winding of DC generator?
why the supply is given to the stator of dc generator give answer
What will happen if less current rating fuse is connect to function generator?
By reducing the output fusing of a generator, the total output of the generator will also be reduced. The capacity of the generator will remain the same but the fault trip point will be lowered.
What would happen to the output of an AC generator if one of the stator windings has an open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
What would happen to the output of an ac generator if one of the stator windings has open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
How voltage build-up in a self-excited generator?
What can usually happen is the permanent magnets in the generator will become energized, and like static shocks, will store energy in them.
What would happen if a shunt-excited DC generator was operated at too low a speed?
A shunt generator is a type of DC generator that does not use a permanent magnet. Reducing the speed of the generator will reduce the output, but not the load the generator requires because the currents in the parallel branches are independent.
When you supply mechanical energy as input to the motor what will happen?
Then the motor will act as generator by principle
What would happen if the coils in a generator stopped spinning?
if that happens, then it would stop working.
