Answer / rahul deo purohit

Short Circuit TEst And open circuit test

Answer / e.saravanan

The General test conducted on transformer is
1.Insulation resistance test
2.Open circuit test
3.Short circuit test
4.Double voltage and double frequency test
5.High Voltage test
6.Resistance test
7.Vector group test
8.Magnetic balance test
9.Break Down Voltage test

Answer / vikramsenareddy

open circuit and short circuit test.
impulse test.
Megger test.

Answer / arya anup

mainly open circuit,short circuit test in order tomeasure
core loss & copper loss. then megger test to check the
insulation level between lv & HV coils.next is high voltage
test to measure capability to withstand impuse of very high
voltages( about 28kV will be applied between HV & Earth)
Then coms double voltage and double frequency test,where
we apply double the rated voltage on to the lv side with
100Hz frequency. this helps to find out insulation problems
between phase to phase.(All tests should be done with oil
inside only)
Oil also to be checked for its break down voltage(shold
with stand minmum 30kV)

Answer / raja

1.OPEN CIRCUIT TEST
2.SHORT CIRCUIT TEST
3.VECTOR GROUP TEST
4.MAGNETIC BALANCE TEST
5.TAN DELTA TEST OF BUSHING CT
6.SFRA TEST- SWEEP FREQUENCY RESONANCE TEST
7.BDV- BREAKDOWN VOLTAGE TEST
8.RATIO TEST
9.INSULATION RESISTANCE TEST
10.STABILITY TEST
11.HIGH VOLTAGE IMPULSE TEST

Answer / gokulkrish

The General test conducted on transformer is

Open circuit test
Short circuit test
Double voltage and double frequency test
High Voltage test

Answer / anbarasu.r

open and short ciruit test

Answer / krupa reddy s

all routine tests and short circuit test

why do we use 25kv supply for traction purpose?

0 Answers   Bhel,

Define noise?

0 Answers  

could anybody able 2 send me jindal steels previous papers fr electrical steam....pls send 2 my id if possible....sirisha.shaik@gmail.com

0 Answers  

what type of load we can give to motor shaft?

2 Answers  

How to Decide(calculate) Bush bar size for copper and aluminiam ?

0 Answers   Essar,

how mass curve differs from hydrograph.

0 Answers  

In an electrical conductor, if current flows because of flow of electrons, then why not the conductor gets thinner day by day???

1 Answers  

what is the avr

6 Answers   ArcelorMittal, Heidelberge Cement,

Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

0 Answers  

how to calculate the output power of vfd , please help me.

1 Answers  

How can you calculate in detail the VA burden of current transformer used for Restricted earth fault protection? Please understand that the CT required here is Class PX or X. Also please show the calculations for knee point vtg, stabilizing resistor, magnetising current.

3 Answers  

sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

0 Answers   Jindal,