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)

what do you mean by lagging and leading current.explain in detail.

1 Answers  

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as per standards how many neutral earthings and body earthings are needed.please help me

2 Answers  

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How To increase Knowledge Of boliler regarding To Only Electrical Field..

0 Answers  

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What is a soft start?

1 Answers   Focus,

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What is FM 200?

2 Answers   Dalkia,

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What are various impedence in any machine

2 Answers   Engineers India Limited, NTPC,

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we change the speed of the synchronous motor by incresing or decreasing a rotor resistance

1 Answers  

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What is the practical way to calculate the cable size for known ampere load?

0 Answers  

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how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING) I O (current operating)?

0 Answers  

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generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

0 Answers  

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why in dc generator field rheostate kept in maximum position?

1 Answers  

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i want to know is it possible to generate usefull power by coupling generator with motor & supply gives to motor by battery source then generator generates power. remove the battery source given to the motor & feed the supply from some of the generated power supply to the motor & motor runs continously. generator generate power contnously.is it possible ?

5 Answers   UltraTech,

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