Answer / ashish gupta

All dielectric are insulators.But all insulators are not dielctric.Becoz dielectric material is used to store electrical energy where as insulators can't.

Answer / mostafaghodrat

As insulation between the energized equipment
Is isolated and not connected to any equipment live even
with insulation

1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)

0 Answers   Bhel,

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What is the Diference between DYN 11 and DYN 5 .How to change the Vector group from DYN 11 to DYN 5.

3 Answers  

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what is meant by twilight switches 7 where its applicable ?

0 Answers  

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What are the two segments of nyquist contour.

0 Answers  

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Is it necessary to install Lighting Arrester on both side side (i.e HT and LT) of Transformer in a transmission substation? if yes Why on both side?

1 Answers  

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

9 Answers   NTPC,

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Since phi is the angular displacement between V & I, then why we use phi in power triangle ie. when showing active, reactive & apperent power in triangular manner & if it is ok then where is V & I in the triangle.

1 Answers  

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Which are Electrical componet and Electronics componet??

2 Answers   KarMic,

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Is possible to increase the voltage without using transformer? why?

9 Answers  

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my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.

3 Answers  

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am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?

0 Answers   L&T,

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We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.

0 Answers  

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