Answer Posted / prakashchandra rana

for 120kw motor flc is 180amp at .8 pf so if we run this motor
on star delta starter we will use two numbers of 150sq.mm
cable from starter to motor and its main power cable will be
of 300sq.mm.

In the magnetic fluxes, what is the role of armature reaction?

1145

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I am a electrical engg. diploma holder,applied for junior engineer (electrical),Kolkata RRB. Have I to attend all electrical,mechanical&civil portion in written exam.???

15616

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What will happen if the d.c. Machine is operated below rated speed?

1214

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we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

1440

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What is center gravity load in substation?

2400

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Explain the working of any one cutting machine

1090

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bitumar

2271

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WRITEDOWN FEW RELY CODES

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hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

2073

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Why we are going for converter transformers for DC drives application instead of distribution transformer?

1981

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How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

1937

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How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

1980

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what is under coal gassification?

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What is the difference between vector surge relay (78) and Pole slip relay (98G)

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The Howland current source produces a A Unidirectional floating load current B Bidirectional single-ended load current C Unidirectional single-ended load current D Bidirectional floating load current

2070

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