Answer / k.prakashchandra

It is not possible to improve IR value as insulation can not
be injected.You can remove the water contents by heating the
coils by making full load current pass through ,using 3
phase dimmer-stat with rotor locked.

Answer / prem

insulation resistance is measured using megger.if megger shows
meaurable value in tens or hundereds then just change the insulatin of lt motor to improve it.

Answer / k.prakashchandra

With dimmer-stat (auto-transformer),it may not be possible
to get full load current in large motors .Then you have to
use strip heaters for heating the coils or DC supply (no
back emf)

how does electrical train works and what type of motors are used to drive the train? which level of supply voltage is used?

22 Answers   Alstom, Infotech,

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hoe we can exlain the effect of caoacitor in fans????????

1 Answers  

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what is the main purpose of line PT and bus PT?

11 Answers   L&T,

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why do we lay up the core of a cable?

0 Answers  

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Why dose voltage rated at 11kva

1 Answers   TK Chemical Complex,

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it is difficult to interrupt a capacitive current because (a)it has a leading power factor (b)current magnitude is very small (c)the restriking voltage can be high (d)stored energy in the capacitor is high

2 Answers   DGVCL Dakshin Gujarat Vij Company, MGVCL, UGVCL Uttar Gujarat Vij Company Ltd,

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why dont we use the same pylon to carry 400 kv plus 220kv and 33 kv ?

2 Answers   Focus, Focus Energy,

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1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

0 Answers   Wipro,

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why transformer ratings are in kva

4 Answers  

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If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?

0 Answers  

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An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The slip when motor stalls is A 1 B 0 C 13.33% D 10.33%

0 Answers  

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ht side line to earth voltage

0 Answers   JLL,

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