Interested to Buy Any Domain ? << Click Here >> for more details...
Will it be OK to connect a 5MVA 33/6.6kV Ynd11 Transformer
to a Star connected Motor. Or on other words connecting a
Delta to a Star.
I have another 30MVA 33/11 Dyn11 and would it be practical
to convert it to Dd0 consequently converting the Voltage
Ratio to 33/6.35kV Dd0.
- 1 Answers
- 5575 Views
- I also Faced
- E-Mail Answers
Answer Posted / a.p.nanjappa
yes. what is the capacity of motor?
In your case , grid voltage is 33kv, Yn connected.Hence
power transformer has neutral connection brought
out.Neutral CT is installed to detect the ground faults.
secondary of 5MVA tranformer is 6.6kv,
This is Feeder bus voltage.6.6kv Feeder bus feeds Motor (
star connected). and Feeder bus is not interconnected to
another source. It is independent.This 6.6kv rotates at 30
lagging to primary3kv system.
Motor must be use inverse & instantaneous time
overcurrent and earth fault ( CDG61+cdg12) or equivalent
manufacturer protection
we use delt to star as weelas star 6.6motor.
No problems experienced.
In the othercase to change a 30MVA,33/6.35KV IS
REDESIGN/MANUFATURING. iT IS EXPENSIVE.No use at all and
advantage. You should change 6.6kv sw.gr also.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?
how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take
what is class of SPD and dittels of all class ?
where was current transformer protection units used and why??
why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?
Explain the process of commutation in a dc machine.
what reactive how to maintain
which type of amplifiers are used in multimete?
Why r u using pf panel. what the uses
what is meaning of 230volts ac 50hzs ac supply is it rms or maximum to getting ac 230v what amount of max voltage they will send
can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??
what shoud be strength and weakness to impress interviewer????????
What do you mean by dependent and independent voltage sources?
what are symmetrical and non symmetrical components in electrical installation.
What are the raitings of Mcb,mccb and Acb in detail ??
