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Total Answers Posted for My Questions # 12
Total Views for My Questions # 21333
Users Marked my Answers as Correct # 51
Users Marked my Answers as Wrong # 12
what is the accaptable voltage between neutral to earth & How to reduse the resistance of earth in chemical earthing
4 Electrical Engineering 5263We are having Chemical earthing pit the voltage between neutral to earth showing 22V how to solve that
4 Electrical Engineering 6020We in my plant one of the transformer showing neutral to earth voltage is 22V how to solve it
3 Electrical Engineering 4235Why Indian Electricity frequency desined 50 Cycles as developed countrys are using high frequency with low voltage
1 Electrical Engineering 4059What is Harmonics how it is produced and what is the method to control the same
Electrical Engineering 1756
Question { 5614 }
Why is it that variation allowed in supply voltage to
motors is (+ or -)10 %, whereas that in frequency is (+ or -
)5 %
Answer
true
| Is This Answer Correct ? | 0 Yes | 0 No |
Question { 5076 }
why air handling unit interloking in case of fire
Answer
handling Unit so that the fire will not spread more fire
will spread easily with air .
| Is This Answer Correct ? | 2 Yes | 1 No |
I have seen 1 video in which a person getting shock while
standing at top of a train,i have 1 question?
why the people sitting in the train doesn't get shock while
that man getting shock from top of the train? How the
earthing of train works?
Answer
is AC supply.
| Is This Answer Correct ? | 4 Yes | 1 No |
Question { 6246 }
Explain Buccholz relay in detail.
Answer
conservator tank and in an angle, when the faults like
loose connection or heat desipation from winding occurs the
gas buble is produced in the oil. As the conservator tank
is installed above the tank level the gas buble trys to
travel to the conservator tank, in between the bucolz relay
is there the gas buble gets trapped in the bucolz relay and
it presses the flot in bucloz relay to down words and it
will activate for once in lot of faults like gas develops
if sudden major fault like short CKT it will activate
imediyetly
| Is This Answer Correct ? | 5 Yes | 0 No |
Question { 6565 }
if dc excitation is used to produce manetic flux in rotating
machines then ehy it is not used in transformers.
Answer
transformer and a generator
Generator which generates the supply it converts mechinical
energy into electrical energy,it produces power.
where as in transformer it transfers the generated power
from one circuit to another circuit with economically
| Is This Answer Correct ? | 2 Yes | 1 No |
Question { 6565 }
if dc excitation is used to produce manetic flux in rotating
machines then ehy it is not used in transformers.
Answer
required to create magnitic flux ,
but in transformer the winding is connected to supply mains
the winding itself produces flux
| Is This Answer Correct ? | 1 Yes | 2 No |
what is the use of surge suppresser in 33 KV incoming panel.
where it must be installed,inseries with incoming cable
surge suppresser must be at incoming of the breaker are
outgoing of the breaker
Answer
produced in Breaker at the time of switching ON
It should be connected between Line to ground ie in parllel
with Supply and should placed at outgoing of the breaker
| Is This Answer Correct ? | 6 Yes | 0 No |
Question { 6291 }
why do we prefer a 3-phase delta connected load rather than
star connected?
Answer
and star connection
The speed will be same in STAR or DELTA
SPEED IS RELATED TO NO OF POLES AND FREQUENCY RIGHT
| Is This Answer Correct ? | 0 Yes | 3 No |
Question { 6137 }
Which is is best option for 33 kv line incomer.I am
Desinging the panel for new projects and i would like to get
Your opinion on this
Vcb or sf6.
Please help me with your replies.
Thanks
D p singh
Answer
| Is This Answer Correct ? | 6 Yes | 0 No |
Question { 6945 }
WHY ARE THE LT GENERATORS SOLIDLY EARTHED WHILE THE HT
GENERATORS ARE EARTHE THROUGH NGR OR NGT??
Answer
high or the impedance is low hence the fault current is
much higheer. In order to limit the Fault current to the
required level suitable rating of resistance needs to be
introduced between the Generator neutral and Earth and to
protect the insulation of the generator and getting heated
up while fault uccurs
| Is This Answer Correct ? | 4 Yes | 0 No |
Question { 3720 }
what is the use of spherical metal balls attached on to the
earth wire of transmission over head lines?
Answer
protect the insulators
| Is This Answer Correct ? | 4 Yes | 2 No |
what is Bucholtz Relay test???? Explain??
Answer
1. By shorting the terminals which is located in the
teriminal box of bucholz relay
2. This is real test to do this test you have to isolate
bucloz by closing the valve which is connected from main
tank to conservator tank there are two valves one is
entering to bulcoz relay and another is leaving from bulocz
relay these two valves to be closed and then there will be
a drain valve in bulcoz the bulcoz relay from there you
have to drain the oil then the float will come down it will
be activated.
| Is This Answer Correct ? | 10 Yes | 0 No |
Question { 6772 }
how hazordious area is classified at an oil & gas plant
and categorise suitable class of electric equipment in that
area like induction motors, LCS, Lighting Fixtures
Fluerescent/Flood lights Mercury& sodium lights, J.Bs,
Power Cables etc
Answer
the plant in a Oil or a gas plant dipends upon the lekages
like gasses or oils where occur in a work place
there are 3 zones
1. zone - 1 where lekages of oil or gas occur in abnormal
conditions
2. Zone - 2 where lekages are never occur in normal
conditions
3. Zone - 0 where lekages are likely occur in normal
operation conditions
the usage of electrical equipment is EXD EXP EXE
| Is This Answer Correct ? | 6 Yes | 1 No |
