Answer Posted / r.sridharan

In generator there is nothing to limit current.Hence winding will over heat and burn.In order to protect generator we kept at maximum position.
In motor to increase torque at initial condition rheostat is kept at minimum position.

What happen if 200 KVAR capacitor connected to power continuesly?

1656

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A 3-PHASE TRANSFORMER IS USED TO STEP-DOWN THE VOLTAGE OF A 3-PHASE, 11KV FEEDER LINE. PER-PHASE TURNS RATIO IS 12.FOR A PRIMARY LINE CURRENT OF 20A, CALCULATE THE SECOUNDRY LINE VOLTAGE, LINE CURRENT AND OUTPUT KVA FOR FOLLOWING.A)STAR- DELTA.B)DELTA-DELTA.

2449

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What is ideal IR values for ground and neutral.

1297

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what is transient stability analysis means?

1666

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What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA

1159

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What is the lockout relay

1063

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What is the importance of earthing?

667

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A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

2018

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Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?

650

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How can we checked Killo Watts of Motor & Alternator?

1692

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why we can stote dc? why we cant store ac?

1619

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Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples. i) 2-PAM ii) 4-PAM iii) 8-PAM iv) 16-PAM v) Quadrature Amplitude Modulation (QAM)

1639

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What is the difference between grid and off- grid system??

1484

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Explain the operation principle, advantages and disadvantages of the following converters: a) A 12 pulse converter b) A Switch-mode inverter c) A thyristor inverter

1494

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what is zinc diffusion?

1545

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