Interested to Buy Any Domain ? << Click Here >> for more details...
Write the formula for Fault MVA, Fault current, Base MVA.
- 2 Answers
- 25200 Views
- I also Faced
- E-Mail Answers
Answer Posted / mak
The fault current of a power transformer will depend on the following;
Transformer Rating (in KVA/MVA)
per unit impedence of the transformer (%p.u.)
line/phase Voltage (VL/VP)
the following formula can be used to find the fault current on the secondary side of a transformer
Fault Current = Transformer Rating /(per unit impedance x phase voltage)
The Values of Transformer Rating, per unit impedance & phase/line voltage will usually be mentioned on the transformer rating plate / data sheet
As an example a 500kVA, 11kV/400V/3-Phase/50Hz transformer with 5% p.u impendence will have the following fault levels on the secondary side
Fault level = 500/(5%)=10000kVA
Fault current = 500/(5% x 400 x 1.732) = 14.4 kA
Remember to use 3phase voltage!
| Is This Answer Correct ? | 3 Yes | 4 No |
Post New Answer View All Answers
The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason
what is the difference between capacitive and resistive voltage divider?
Why two phase welding machine is used instead of three phase welding machine.
What is Auto Mains Failure Panel & Auto Synchronizing Panel
what is the main function of capacitors in mccs.
where the lexical paramater will use in fron end?
dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?
what is sevice settings for mccb?How can be it setted?
What is power in wattage of 8.5 TR AC
while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends
Why synchronous motor is used in power factor improvement,dc series in lift
sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai
What is effect of over voltage and under voltage on ACB
I have a situation to design sub-Distribution board/Panel meant for feeding power sockets. In the incomer CAN i Take TP MCCB with Neutral Link and All the outgoing feeders with to sockets with TP MCCB and Neutral Link? P.S : My System is IT Earthing
1.how many types of relays? 2.difference between ATS& STS?
