Hi,
I've just got into my electrical engineering course and I need some help with a question of mine here.
During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz.
From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.
Answers were Sorted based on User's Feedback
The transformer actual load [apparent power] S=0.23*
(163+150+147)=105.8 kVA.
You may calculate approximately taken the average current
(163+150+147)/3=153.33 A and the formula sqr(3)
*0.415*153.33=110.2 kVA [4% error].
But this is not the rated power. The rated power and the
rated current have to be written on manufacturer rating
plates.
Is This Answer Correct ? | 0 Yes | 1 No |
What types of motors are used in cranes
How Can we calculate current carrieng capacity of Copper Bus-Bars and Alluminium Bus-bar
What do you mean by Frame 5 Gas Turbine as well as Mark II.
when turbine trips generator will becomes induction motor or synchronous motor?
Explain Continuous and Discrete signals?
Why we use two wattmeter during block rotor test and no load test of 3phase induction motor? And how can we understand the neat power requirement of from this test?
what is difference between elr and R eartl realy.
what is the meaning and difference between ELECTRICAL DRAWOUT and MANUAL DRAWOUT?
which is dangerous AC or DC?
Why annealing is done on transformer core manufacturing process?
whate is aelectrical power fector for exampal
Application wise, where we should use AC motors and where we should DC motors?