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. What is the operating frequency, 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. What is the operating frequency, if the load is 600 MW?

48.5 Hz

45 HZ

48 Hz

50 Hz

48.5 Hz

45 HZ

48 Hz

50 Hz

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Electrical Machines
Eddy current loss will depends on

Flux density

All of these

Thickness

Frequency

Flux density

All of these

Thickness

Frequency

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Electrical Machines
A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

rotor of a dc machine.

stator of a dc machine.

stator of a induction machine.

rotor of an synchronous machine.

rotor of a dc machine.

stator of a dc machine.

stator of a induction machine.

rotor of an synchronous machine.

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Electrical Machines
The synchronous reactance( Xs) is the

reactance either due to armature reaction or leakage flux

combined reactance due to armature reaction and leakage flux

reactance due to armature reaction of the machine

reactance due to leakage flux

reactance either due to armature reaction or leakage flux

combined reactance due to armature reaction and leakage flux

reactance due to armature reaction of the machine

reactance due to leakage flux

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Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

less than 90o.

90o.

0o.

Greater than 90o.

less than 90o.

90o.

0o.

Greater than 90o.

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Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

541.67V, 200 rpm.

2166.67V, 270 rpm.

541.67V, 250 rpm.

2166.67V, 230 rpm.

541.67V, 200 rpm.

2166.67V, 270 rpm.

541.67V, 250 rpm.

2166.67V, 230 rpm.

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Electrical Machines

Electrical Machines Eddy current loss will depends on

Electrical Machines A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

Electrical Machines The synchronous reactance( Xs) is the

Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines
Eddy current loss will depends on

Electrical Machines
A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

Electrical Machines
The synchronous reactance( Xs) is the

Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?