Answer / arpit sood

an important test is the tan delta test or the dissipation
factor test
This is carried out with the help of an automatic scherring
bridge to measure the capacitance of the insulation
this is a measure of the integrity of the insulation or the
life expectancy of the transformer
the value of the dissipation factor should be more than or
equal to 0.7

Answer / sadineni sreedhar

we are carried out the below tests
1)IR-insulation resistance
2)turns ratio test
3)winding resistance test
4)automatic capacitance and tan delta or dissipation test
5)short circuit and open circuit test
6)vector group test

if its possible for step up or step down DC volage directly ? possible means how we can do it ?

5 Answers  

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what should be 3phase motor capacity or rating to connect in star connection. what should be 3phase motor capacity or rating to connect in delta connection. what should be 3phase motor capacity or rating to connect in star delta connection

1 Answers  

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I am working as a software engineer for the past 4 years. I am interested to do M.tech in premier inst. like IIT, IIIT, NIT,... I am preparing for the GATE exam for the past 2 years. Can anyone tell me how about the placement in IIT's for m.tech in (microelectronics and vlsi or electronics related discipline). Some of them are telling like placement is very rare for m.tech electronics. Also the placement details in IIT websites are not true. Is that so ? can any one help us regarding this.

1 Answers  

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What mean 150 amp hour write on battery.

1 Answers   Syncom,

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What will be the capacity of the generator set which can be used for my 2 ton window air conditioner ?

1 Answers  

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Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

0 Answers   Gasco,

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Why we use three phase world wide why not four phase or five phase being used?

8 Answers  

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th how could we differentiate between armoured copper and armoured aluminium cable what is the basic application? why we prefer the armoured copper as compared to armoured aluminium.

0 Answers   HMC,

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List examples of voltage source?

0 Answers  

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What is STEP VOLTAGE ?

7 Answers  

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The control system is used for?

3 Answers   CCP, NTPC,

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my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

0 Answers  

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