The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

14.28 and 9.60 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

14.28 and 9.60 ÃŽÂ©.

8.248 and 5.54 ÃŽÂ©.

14.28 and 5.54 ÃŽÂ©.

8.248 and 9.60 ÃŽÂ©.

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Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

80W

100W

60W

40W

80W

100W

60W

40W

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Electrical Machines
In DC machine torque depends on which of the following?

both A and B

armature current (I)

speed

flux (φ)

both A and B

armature current (I)

speed

flux (φ)

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Electrical Machines
Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be

238.2 V.

256.4 V.

271.7 V.

240 V.

238.2 V.

256.4 V.

271.7 V.

240 V.

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Electrical Machines
In a star - delta starting of an IM

line voltage is 57.7 % of stator voltage.

reduced voltage is applied to the stator.

applied voltage per stator phase is 57.7 % of a line volt

resistance is inserted in the rotor.

line voltage is 57.7 % of stator voltage.

reduced voltage is applied to the stator.

applied voltage per stator phase is 57.7 % of a line volt

resistance is inserted in the rotor.

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Electrical Machines
In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses?

3KW

0.5Kw

2KW

1.5KW

3KW

0.5Kw

2KW

1.5KW

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Electrical Machines

Electrical Machines The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

Electrical Machines In DC machine torque depends on which of the following?

Electrical Machines In a star - delta starting of an IM

Electrical Machines In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses?

Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

Electrical Machines
In DC machine torque depends on which of the following?

Electrical Machines
In a star - delta starting of an IM

Electrical Machines
In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses?