What would be the effect on the terminal voltage of a differentially compounded generator delivering full load if its series field winding is short circuited?

In question terminal voltage of the compound generator is given 230 V. If series field winding gets short circuited then effect of series field flux will be lost. So, if terminal voltage becomes greater than 230 V then without hesitation we can point it out as under compounded generator.

What is the level compound generator?

A level compound generator is when the terminal voltage at rated current is the same as the one at no load condition. It is called an over compound generator if the terminal voltage is more than the rated current.

What would happen if the shunt field circuit of a lightly loaded cumulative compound motor was suddenly opened?

Open Shunt Field The shunt field must never be opened while the motor is running. If the shunt field suddenly opens while the motor is being operated under full-load conditions, only a small voltage due to the residual magnetism of the pole pieces will be induced into the armature. Current will increase considerably.

What is the effect if the shunt field resistance is above critical resistance value in a DC generator?

The critical field resistance is defined as the maximum field circuit resistance (for a given speed) with which the shunt generator would just excite. The shunt generator will build up voltage only if field circuit resistance is less than critical field resistance.

What will happen if the series field of a differential compound motor is short circuited?

What will happen if the series field of a differential compound motor is short circuited? Explanation: As the series field is short circuited, current through series field becomes zero and MMF due to series field becomes zero.

What is over compound generator?

Over Compounded Generator If series winding turns are so adjusted that with the increase in load current the terminal voltage increases, it is called over-compounded generator.

What are the characteristics of a series field?

The field is wound with a few turns of large wire because it must carry the full armature current. A characteristic of series motors is the motor develops a large amount of starting torque. However, speed varies widely between no load and full load.

What will happen if the shunt field winding of a loaded shunt motor accidentally breaks?

Ans: if the shunt field winding of a loaded shunt motor accidentally breaks, the loss of shunt field current would result in stopping of the motor or burn out the armature or fuse.

What happens if the field resistance can go above the critical field resistance value?

Note : If field circuit resistance is more than RC at start then induced e.m.f. fail to drive current through field circuit and generator fails to excite at given speed.

What is the effect if the shunt field resistance is above critical resistance value in a DC generator Mcq?

Voltage will not build up if the field resistance is greater than critical resistance. The speed of the generator should be greater than the critical speed. This can be remedied by increasing prime mover speed above critical speed.

What will happen if the series field of a differential compound motor is short circuited Mcq?

9. What will happen if the series field of a differential compound motor is short circuited? Explanation: As the series field is short circuited, current through series field becomes zero and MMF due to series field becomes zero.