WE know that for Inductor X=2pifL,In DC f=0,then X=0
so,V=IX=0;But In the DC excitation of rotor of AC
generator,DC motor field coil which coils are inductor so
why does not applying DC voltage short the rotor coil of AC
generator and field coil of motor?If it would then DC source
might be damaged but it is not happened.
Why does the strand conductor of Electrical power
transmission line make twist?
Q.1:What protection will be used on HT and LT side of 33/0.4
KV, MVA transformer. Indicate capacities of protective
device to be used.
Q.2:Which types of back-up protections are used in the power
transformers? What do you understand by the term over travel
in the relay?
Q.3:How star and delta connected winding transformer are
provided from earth fault
What are all present producing cost of Per KWH of various
defult setting in p220 micom motor proction relay for
11kv,640kw,f.l.a.-40a,1440rpm ht motor?
What is Phasing out test?
1)How much current can a 3-1/2 core 100 mm wire carry?
2)What are the special cables required for explosion proof wiring?
3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing?
4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why?
5)What are the different types of soft starters for large motors?please explain?
Safety of on line ups
by what factor the starting current is used when comparing
star and delta connection for motor starting?
What is true sine wave or pure sine wave inverter??
Is it sine wave or step wave??
If it is step wave, waves with how much step is considered
as pure sine wave?
Is it possible to produce pure sinewave using power
plese send me the oces/dgfs sylabus and previous year
question pattern of electrical engg.?
What is servo lock in CNC how they work and if any
parameter for them in CNC machine
What is MS-EXCELL?
am commissioning the trafo without connecting the neutral
therefore unbalance will occur what is the alternative
solution for this?
HOW WE CALCULATE CURRENT IF THERE ARE NOT PRESENT ANY AMMETER
What is the alternate solution for testing of polarity by
using polarity tester while its milli ammeter does not
How to reduce the static electricity producing in solvent
By P.D.Patil BioCon
what questions will be asked for 11/33KV licence interview APSEB hyderabad.
Can any one share question and answers.