Answer Posted / phani chavali

consider a 3phase induction motor,it is a selfstarting
device.Eventhough it is a selfstarting one we are connecting
this device to starter because if we can not connect this
motor to stator because of sudden flow of currents in the
rotor windings some damage may takes place to the machine.so
we can start up the motor with starter means we can limit
the currents to certain value upto which the rotor gets
accelerated.When ever rotor attained its rated speed then
there is no problem of current flow.

how we can do the insulation on secondary of ct explain and so that tan delta will within limit

1876

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what is meant by LCR meter? where its useful ?

2000

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What are the advantages and disadvantages of open loop control system?

1054

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-How do you select cable size for a given load at a given distance from source of supply. How do you find voltage drop.

1745

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Why synchorised generators are used for the production of electricity?

1132

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Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

2054

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What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?

1511

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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)

2079

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What are the advantages of nichols chart?

1241

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What is the difference between Droop vs Isoch Control?

2367

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any one guide me to reduce the power factor of diesel Generator from 0.97 Leg to 0.8 Leg.with out any change in my load.

1616

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what is Anti-pumping?

1886

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While testing a ZCT what parameters have to check or measure?

2334

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What are Contactors? How they works and what its highest rating?

2064

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what is the thumb rule for determination resistance of resistor?

2257

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