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 Categories >> Engineering >> Electrical Engineering
 
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Question Asked @ Answers Views     Select
why on delay timer used for fully automatic star delta starter?    0  2
why we don't use earthing as neutral?    0  2
why the power factor of the induction motor is low?    0  4
how to select fuse rating for a 3-phase motor ???    0  4
How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?    0  4
what is effect of length of air gap on performance of dc motor and generator?    0  7
How we can defined theecopper cable size if we know the aluminium cable size?    0  6
i am getting to neutral earth voltage zero ,is this a perfect earthing ?    1  8
What is industrial plc    0  6
how a circuit breakers work at fault condition .plz give a specified answer.    1  9
We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.    1  14
which of the following motors is non-self starting?    3  17
How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?    0  10
What is meant by load angle of an alternator? Upon what factors does the load angle depend?    0  7
Can a generator rated 400 V, 60 Hz be used in a 50 Hz System? Yes or No ? Why ?    0  12
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Un-Answered Questions
 
 Question Views   Select
 
how to calculate voltage drop and followed by cable calculation?is there avail in formula? 428
how to carried out tan delta test in 11 KV alternator ? 1130
draw singleline diagram of star to delta and dol starters 508
iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation. 445
What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD 527
What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current? 245
what is effect of 5amp fuse on 2mva pry protection of transformer 315
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 ? 122
WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC 358
can indirect loading be called as phantom loading? 330
what is the IS foe lightning arrester? 426
What is domestic transformer? Draw the connection of domestic transformer. 627
What kind of preventive maintenance are there for AC induction motor? 738
I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables? 710
WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES. 424
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