Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

200 MW and 400MW respectively

generator 2 gets over load

230.7 MW and 369.23 MW respectively

generator 1 gets over load

200 MW and 400MW respectively

generator 2 gets over load

230.7 MW and 369.23 MW respectively

generator 1 gets over load

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Electrical Machines
A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be

15.28 Nm

15.6 Nm

16.55 Nm

15.92 Nm

15.28 Nm

15.6 Nm

16.55 Nm

15.92 Nm

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Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

shift forward by more than 90°

shift forward by 90°

coincide with the GNA

shift forward by less than 90°

shift forward by more than 90°

shift forward by 90°

coincide with the GNA

shift forward by less than 90°

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Electrical Machines
When maximum starting torque is obtained, rotor power is

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Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

increasing terminal voltage.

increasing input power of the prime mover.

increasing armature cooling.

increasing armature resistance.

increasing terminal voltage.

increasing input power of the prime mover.

increasing armature cooling.

increasing armature resistance.

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Electrical Machines
For P pole machine relation between electrical degrees and mechanical degrees is

θelec = 4/P*θmech

θelec = 2/P*θmech

θelec = θmech

θelec = P/2*θmech

θelec = 4/P*θmech

θelec = 2/P*θmech

θelec = θmech

θelec = P/2*θmech

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Electrical Machines

Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be

Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

Electrical Machines When maximum starting torque is obtained, rotor power is

Electrical Machines The change in speed of a DC generator due to increased load is corrected by

Electrical Machines For P pole machine relation between electrical degrees and mechanical degrees is

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines
A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be

Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

Electrical Machines
When maximum starting torque is obtained, rotor power is

Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

Electrical Machines
For P pole machine relation between electrical degrees and mechanical degrees is