Interested to Buy Any Domain ? << Click Here >> for more details...
Between Star-Delta & Star-Star Power transformer which one
is efficent for Earth Fault?
- 10 Answers
- 16588 Views
- I also Faced
- E-Mail Answers
Answer Posted / daher
star/star because in the case of line to earth faults the
zero curret IO in delta connection transformer has no path
to leave the close loop of three phases transformer
| Is This Answer Correct ? | 17 Yes | 8 No |
Post New Answer View All Answers
How many types of losses occur in a transformer?
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
how to find the resistance and gap volatage of the diode??
How to work E.L.C.B and how to connect in circuit.
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
What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?
which is the best institute for PLC,SCADA,DCS in hyderabad
Define bibo stability.
As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?
what is the difference b/w ATS and HTS?
if i am in front of transmission line how to know that current direction without any equipment
what is the formula for calculating the phase clerance between two phases and phase to earth how to calculate the cable for a motor
How DC earth leakage currents can be reduced ?
what is the major difference between LIBBP & HIBBP.. which one is most preferable..
