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when excitation fails,Reactive power will be supplied by the system to which the generator is connected and generator will work as induction generator and its speed will rise a little. generator which was in over excitation mode will work in underexcitation.but there is under excitation limit which should not be reached so we should detect loss of excitation and trip generator
What else can I help you with?
What happens if the synchronous motor exceeds its load capacity?
If load on a generator is greater than the generator can provide, the generator will begin to slow down. If it slows down too much, it will lose synchronism.
In parallel circuit-what happens to the total resistance if one branch opens-Provide an example?
Increases
What happens to the output in terms of real power of a generator when you change the voltage and frequency say from 220v 50Hz to 110v 60Hz?
The voltage and frequency ARE the output of the generator. If you change the fuel to the generator, it will change speed, and the voltage will change. Less fuel = less speed = lower frequency = lower voltage.
Advantages and disadvatages of a self excited induction generator?
The main disadvantage should be obvious - when the output voltage of the generator is used to provide field current to the generator....what happens if the output voltage sags? If the output voltage becomes depressed, the output power of the generator is compromised (becomes less and less), this in turn can cause the output to become more depressed, leading to an incrementally decreasing output capability. The main advantage is cost savings.
What happens to the voltage if batteries if they are setup in a parallel and a series circuit?
Assuming all of the individual batteries are the same voltage, if arranged in a parallel circuit the voltage is the same as any one battery. If arranged in a series circuit the voltage will be the sum (the total) of all of the batteries added together.
If the excitation of generator changes what happens to the terminal voltage?
By Decreasing the excitation voltage the terminal voltage will decrease and similarly by increasing the excitation voltages the terminal voltage will also increases.
What happens at the rated value of the voltage of the generator?
The rated voltage of a generator decreases due to many causes such as armature reaction, overloading of the generator and AVR failure/ weak excitation voltage.
What is a reverse KVAR relay?
The reverse KVAR relay protects a generator from a loss of excitation. When the excitation system is lost, reactive power will flow from the system back into the generator. When this happens, induced currents at twice the system frequency will flow in the rotor windings and rotor structure.
What is meant by excitation frequency?
Excitations frequency is the frequence of the electron making a quantum spring from a higher level to an lower. In cemical reactions the excitations happens alle the time, an it happens in a frequence.
What happens if less current rating fuse is connected 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 happens insider generator?
A coil of wire spins in a magnetic field
What happens to resistance when resistors are wired in parallel delta circuit?
What do you mean by a 'parallel delta' circuit -is there such a connection.
What happens if you connect two transistors parallel?
If you connect two transistors parallel it will heat up and be damaged.
What happens if the synchronous motor exceeds its load capacity?
If load on a generator is greater than the generator can provide, the generator will begin to slow down. If it slows down too much, it will lose synchronism.
How do you stabilize or regulate ac three phase voltage and frequency output from natural gas generator?
A natural gas generator connected to the grid has its voltage and speed (frequency) stabilised by being connected to the grid. All generators on a grid run synchronously, and it happens because if one generator has a tendency to lag behind it will produce less power and thereby maintain its speed.
What happens during de- excitation?
During de-excitation, an excited atom or nucleus releases energy in the form of photons (light) or particles (such as alpha or beta particles) to return to a lower energy state. This process can occur spontaneously or be triggered by collisions with other particles.
What happens when parallel rays of light hit a smooth surface?
When parallel rays of light hit a smooth surface, they are reflected at the same angle they hit the surface. This is described by the law of reflection. The reflected rays remain parallel to each other.
