hubertsubis s


{ City } chennai
< Country > india
* Profession * trainee engineer
User No # 35475
Total Questions Posted # 11
Total Answers Posted # 3

Total Answers Posted for My Questions # 43
Total Views for My Questions # 138646

Users Marked my Answers as Correct # 23
Users Marked my Answers as Wrong # 33
Questions / { hubertsubis s }
Questions Answers Category Views Company eMail

why neutral should connect to earth in delta-star type transformer

 4 Electrical Engineering 7994

why solinoid coil used in tripping rely?and why not other type coil?

 1 Electrical Engineering 2295

what is XLPE type cable

Areva,

8 Electrical Engineering 11646

what is difference between c-power & u-power air circuit breaker?

Areva, IIT, Marine Electricals,

2 Electrical Engineering 28275

phase colour is indicated by R Y B (red yellow blue) but in transformer i have seen U V W instead of (R Y B) have any meaning of this

Areva, Kim Yew,

3 Electrical Engineering 20038

we can stepdown the voltage from 230/12v ,and we use the voltage for various electronics components why can't we step up the voltage from 12/230v if we can shall we use the voltage for domestic single phase supply

Areva,

5 Electrical Engineering 7434

why current transformer secondary side should be shorted ?

Areva,

5 Electrical Engineering 10941

why we used capacitor in induction motor?

Mitsubishi,

4 Electrical Engineering 6817

in ONAN type transformer winding temperature is lower than oil temperature at evening time but morning winding temp is higher than oil temp what is the reason?

Areva,

2 Electrical Engineering 5817

what is the use of CAPACITOR in CFL lamp?

Areva, Autopal,

6 Electrical Engineering 12658

what is the function of 1 phase preventer?

ABB, Electrical,

3 Electrical Engineering 24731



Answers / { hubertsubis s }

Question { Reliance, 7515 }

If DG runing time Neutral earth connection Dissconect
what will be the effect in load and equipments.


Answer

the unbalanced voltage will return to the alternator and
get over heat to the machine

Is This Answer Correct ?    6 Yes 0 No

Question { ABB, 46469 }

Why TAP changer provided in primary side of HT
transformer ? and why not in secondary?


Answer

if you provide tap changer on ht side we variy the voltage
as we required at secondary side if we connect in secondary
side we can variy the current as the changes in load

Is This Answer Correct ?    10 Yes 31 No


Question { 9516 }

why the rating of a transformer in kva not in kw.


Answer

There are two losses in transformer cu loss depends on
current & iron loss depends on voltage total loss depends
on voltamper(VA)at that time we do not require power factor
thats way we mentioned transformer rating in kva not in kw

Is This Answer Correct ?    7 Yes 2 No