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 we cannot apply ohms law to transformer?

3 Answers  

When will you multiply and devide with derating factors to the actual value while sizing the cable?

0 Answers  

Kindly Tell me name of the book for electrical estimation and costing ,calculation or web site to download

1 Answers   ABB,

what are the safety in transformer,diesel generator,ups, chiller plant,h.t. , L.t. , sewage treatment plant(stp),water treatment plant(wtp), fire. plz ans. me in detail if you know any of the mention above. i urgently need

2 Answers   Claris Lifesciences, EFS,

What are the advantages of star-delta starter with induction motor?

7 Answers   Merchant Navy, Naval Academy, Samundra Institute of Maritime Studies, YMCA,

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...

6 Answers  

Procedure for conduting vector group test on power transformers.why it is conducted?

6 Answers   Grasim,

how can maintain the power factor and why and this is how do work tell us

0 Answers   Wipro,

WHICH SIZE A.B.CABLE IS USED FOR 11KV.

0 Answers   Novel Tech Park, Power Grid,

Based on what the rating of machines are provided??(ANswer should in single word)

19 Answers   Asian Paints, Bhel,

howmany types of compresor is there? and how to calculate compresor capacity?

3 Answers  

tell me the various standerd of CT ratio

1 Answers   ICA,