Can anyone explain how the vector diagram of a transformer
which doesn't have name plate be found whether it is
Dy11/Dy5/Yd11 and so on?
- 4 Answers
- 10985 Views
- TATA, I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
Whether Dy or Yd can be ascertained from the bushings.To
find particular vector group ,CRO can be used finding
relationship between the current vectors.e.g.In Dy 11 I2R
lags I1R by 30 degrees Number 11 denotes position of minute-
hand in a clock.It can also found out by taking various
voltage measuremnts and analysing
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
A 400KVA transformer has 400 Hz frequency. If the frequency is changed to 50 Hz, then what will be the new KVA rating?
Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
What conditions are required for transformer to operate at low frequencies ?
Can anybody tell abt concrete encased earthing or grounding?
how are reversing the direction of rotation of dc motor
For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation
what is upper impedance and lower impedance of a distance relay
Which type of transformer is used for lighting loads?
what is inter connected dc generator?
how can check the resistance of battery contact?
Why we use auxillary relay ? what is function of differential relay, directional o/c relay?
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
how we can calculate the efficiency of a diesel generator ?
Why to keep capacitor bank off while generator running.
Purpose of providing neutral isolation panel for parallel operation of diesel generator
