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
- 5446 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
where does 22kv line starts
what is formula to cal cute earth pit numbers and size of earth strip used in earthing?
what is the meaning of 5% droop or 7% droop in AVR?
what are the different methods for the starting of a synchronous motor.
How to calculate cable size in HT AND LT
Explain the operation principle, advantages and disadvantages of the following converters: a) A 12 pulse converter b) A Switch-mode inverter c) A thyristor inverter
i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected
What are the necessary components of the feedback control system?
what is the reactance,capacitance & impedence electrical armoured & unarmored Cables.
What is the importance of counter based plan & how is it scheduled?
how can i change the rotation of the AC single phase induction motor and show me by diagram
please send me privious exam's queation papers of section engineer(electrical).
what is meant by IGBT how they differ from tyristor ?
why tertiary winding is used in transformer with diagram?
This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.
