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The calculation of greatest fault current of system is required for calculation of the capacity of the switchgear or bus bar or cable. The source of the supply will be the consideration.The MVA/kVA capacity of the transformer or generator which is the source. The simple equation to find the short circuit current is 1.1 x V L I = --------------- Amps √ 3 x Z I - short circuit current Line voltage is multiplied by 1.1 to take care of 10% rise in voltage Z Impedance in ohms % Z x10 x kV 2 Z = --------------------- kVA Detailed calculation method is available in www. ecmweb.com You must read it if you are really interested to learn the subject. There are so much reading material on the subject in the net itself Similarly read this link http://books.Google.co.in/books?id=yiT9Doq8TRwC&pg=PA184&lpg=PA184&dq=short+circuit+calculation+of+bus+bar+&source=web&ots=L1ww-bULxl&sig=Ker1LfRB8E9pWC5-fKnyNqPi_K0&hl=en#PPA184,M1
What else can I help you with?
Busbar fault level calculation?
what do you mean by 50 KA for 1 sec
Why short circuit calculation is not required for LT cables?
Lt cables has own impedance which reduce the short circuit fault level
What is the unit substitution fault finding technique?
Unit of fault level is KA. Kilo amps
Calculation of restricted earth fault relay stabilizing resistor?
Requirement of REF protection for 50KVA 11KV/.4KV transforemr
What do you mean by fault MVA?
This describes what is known as the 'fault level' at a particular point in an electricity transmission or distribution system, expressed in megavolt amperes, enabling the theoretical value of fault current to be calculated at that point in the system, in order to ensure that the relevant switchgear is capable of interrupting that level of fault current.
Busbar fault level calculation?
what do you mean by 50 KA for 1 sec
What does computed mean?
Make a mathematical calculation or computation....
Why short circuit calculation is not required for LT cables?
Lt cables has own impedance which reduce the short circuit fault level
What is the formula of load calculation?
There are various formula of load calculation. Power equals current multiplied by the voltage. Power can also be computed by multiplying the resistance by the square of the current.
What is the lowest level of measurement that a median can be computed?
At least ordinal
What is subtrnsient?
These terms appear in the calculation of fault currents. Common sources of fault currents are rotating machines, i.e., motors and generators.
What is the calculation for the calibration of a Level instrument displacement type dry method?
How to find out the calculation for dry calibration of a level instrument used on the top of the tank? How to calibrate level instrument with the help of weights?
What is an adjective for compute?
It is computed, as in "the computed value".
What is the unit substitution fault finding technique?
Unit of fault level is KA. Kilo amps
Calculation of restricted earth fault relay stabilizing resistor?
Requirement of REF protection for 50KVA 11KV/.4KV transforemr
How calculate actual boiler drum level?
boiler drum diffferential pressure level calculation explained
How to conduct Mann-Kendall test for trend analysis?
by using this formula where y=data values at times i and j and n=length of the data set and Under the null hypothesis that yi are independent and randomly ordered, the statistic S is approximately normally distributed when n≥8, with zero mean and variance as follows: The standardized test statistic ZS is computed by: Decide on a probability level of significance (95% typically) The trend is said to be decreasing if ZS is negative and the computed probability is greater than the level of significance. The trend is said to be increasing if the ZS is positive and the computed probability is greater than the level of significance. If the computed probability is less than the level of significance, there is no trend. you can use Excel to compute the equations. Tq
