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Total Answers Posted # 12
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Why we connect the capacitor in Delta?if we conect in Star what will happen?
9 Electrical Engineering 32479What is IGBT?Where it is used? What is the difference between IGBT and Thyristor?
5 Electrical Engineering 64661What is the difference between Surge protection device and Lighting arrester?
6 Electrical Engineering 16578Explain the working principle of Synchronous Generator and Assynchronous generator?
TATA,
11 Electrical Engineering 54474Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?
9 Electrical Engineering 16203How the starter control the starting current in three phase AC Motor?(In DC apply the reistance).
6 Electrical Engineering 15864Synchrounous motor is three phase motor,but its not self starting .why?
23 Electrical Engineering 57731Clearly Define Active,Reactive,Apparant power.Which applications used which power above metioned power?
9 Electrical Engineering 23289What is the difference between voltage transformer and potential transformer?
ABB, ETA, Maritime Academy, MSEB, Reliance Jio, Voltas, Wipro,
38 Electrical Engineering 97357
What meant by lagging and leading? When if they are
occurred what preventive methods should be taken?
Answer
1.Resistive load
2.Inductive load
3.Capacitive load
Resistive load always having unity power
factor.So we do not consider that type of loads.
In Inductive load Having Lagging power
factor,so we must improve the power factor.For this
improvement we can choose capacitor,Synchronous Motor
connected in parallel.These Loads give the Leading
current ,so it is compensate the lagging current...
| Is This Answer Correct ? | 88 Yes | 3 No |
what is the function of commutator in dc motor?
Answer
not DC Supply.But we want Dc source , so want one converter
thats why we use commutator.In shortly we can say its
converts AC source to DC source.
| Is This Answer Correct ? | 201 Yes | 138 No |
why the current leads voltage in the case of a capasitor
Answer
the supply to the capacitor,at first the capacitor do
discharge,then charge.We can invent the angle of leading
from wave forms.Its leads angle may choosing of capacitor.
| Is This Answer Correct ? | 4 Yes | 22 No |
condider as 100 w lamps glowing . for completing a one unit
how much time it should glow
Answer
Now we take 100 w/h load .Its mean it will
take 100w (electricity power consumed)by one hour and
respectively 200 w take two hours.....Finaly 1000w take 10
hours (without load interuption).
So it will take 10 hours
| Is This Answer Correct ? | 29 Yes | 2 No |
hw to find transformer is in normal position? whether its
in charged condition or not? except humming sound?
Answer
1. OTI (Oil temperature indicator) shows the winding
temperature value
2.WTI (Winding temperature indicator)shows the winding
temperature value
but its not correct way because if we disconnect the TxR (after
some hours) charging both may show current values
| Is This Answer Correct ? | 1 Yes | 1 No |
Question { 8972 }
In a three phase transformer(delta/star connected)when i
touch one end of the bulb in any one phase and other end to
earth..will the bulb glow or not..if not why?..i'm touching
the bulb in star connected side...
Answer
glow the lamp can get via your body i.e phase and
neutral,hence the lamp will glow.Incase if not,i think (not
sure) your body may have higher ohmic resistace.
| Is This Answer Correct ? | 2 Yes | 5 No |
Question { 13426 }
how we can select MCB ratings according to Voltages, Curves.
Answer
we want 230V,select single pole MCb's else want 415V select
3 pole MCB's.
2.We can select the MCB's according to to Curves is also
simple,there are several types of curvature available..
there are,
B type: react quickly overload i.e 3-4.5 times of full load
current
Type C: react more slowly,these are recommended for
inductive with high inrush currents like fluorescent lamp.5-
10 times of Ifl
Type D: 10-20times of Ifl,recommended for very high inrush
current.
Type K: 8-12 times of full load I,recommended for cable
protection to be provided which include
motors,capacitors,and transformers
Type S: 13-17 times of Ifl,recommended for protection of
control Transformer,
Type Z:
| Is This Answer Correct ? | 31 Yes | 2 No |
Question { 12932 }
BRIEFELY EXPLAIN MEGGAR PRINCIPLE
Answer
instrument used for measure the high value resistance (IR
value).
| Is This Answer Correct ? | 26 Yes | 4 No |
Question { 6750 }
different between electrical and electronics Engineering????
Answer
If the current conducting process happening on
the metal conductors like cu,al...means its called as
Electrical engg.
Electronics-
If the current conducting process happening on
vacum tubes,semiconductors...means its called as
Electronics engg.
| Is This Answer Correct ? | 2 Yes | 3 No |
