Interested to Buy Any Domain ? << Click Here >> for more details...
why ct is testing using dc.. y cant we use AC insted of dc
on POLARITY TEST.
- 6 Answers
- 13039 Views
- I also Faced
- E-Mail Answers
Answer Posted / raghavendran.r
I think for Polarity testing AC is being used in power transformers.Let me explain the circuit for the same .Keep the secondary side open.But short one of the terminals of the secondary side with the primary side, so that the primary current flows through the secondary.Now adjust the primary voltage using variac and note down the secondary voltage.If primary voltage is greater than secondary then the polarities are different.
If secondary voltage is more than primary then the polarities are same.
This is how polarity is tested in power transformers and Motors.
The same may apply to CT also.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
what is the meaning of WYE and DELTA in Electric meter?
In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?
What type of a DC motor would you use for a lift?
When lag/lead/lag-lead compensation is employed?
I need model question papers for RRB section engineer Chennai... Please send to my E-mail Id:- maitheerainbow@gmail.com
Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?
what is Different between Bilinear and Unilenier?
what happen if drive input fail momentry at 48.5 HZ frequency?
what parameters are should nessary for control technic dc drive(in rolling mills)?
What are the conditions to be satisfied for parallel operation of dc generators?
What do you mean by a voltage transformer?
any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?
Can anyone provide with a SLD for HT panel installation for a 33KV line and distribution end has three 1.5MV transformers. Is it suitable to use OCB or VCB and also provide me the suitable rating and its connection diagram.
can u describe the method used for protection of transmission line.
How we calculate the current carrying capacity of H.T. cabel?
