Your question is a perfect example of why it's so important to use correct symbols, because you (presumably) mean 'How do you convert 12.5 megavolt amperes into kilovolt amperes?'.
The correct symbol for megavolt ampere is MV.A, not mva because a lower-case 'm' represents 'milli' not 'mega'! So you're original question appeared to be asking how one would convert '12.5 millivolt amperes' to 'kilovolt amperes'! And the symbols for volt and ampere, incidentally, are both capitalised: V and A.
So, 12.5 MV.A corresponds to 12 500 kV.A.
Each phase supplies 15 kVA. The primary has a line-to-neutral voltage of 277 v so the line current is 15,000 / 277 or 54 amps. The secondary has a line-to-neutral voltage of 120v so the current is 15,000/120 or 125 amps.
There are 12.5 km. in 12,500 metres.
To convert pounds to kilograms, you need to divide the weight in pounds by 2.20462, as 1 pound is approximately equal to 0.453592 kilograms. Therefore, to convert 105 pounds to kilograms, you would divide 105 by 2.20462, resulting in approximately 47.63 kg. Similarly, to convert 125 pounds to kilograms, you would divide 125 by 2.20462, resulting in approximately 56.70 kg. Subtracting 56.70 kg from 47.63 kg gives you approximately -9.07 kg.
125 pounds = 56.7 kilograms.
125lb = 56.7kg
VA or KVA or MVA
The power in a 15 MVA (15000 KVA) transformer depends on the power factor. You did not specify the power factor, so I will assume a power factor of 0.92. Simply multiply MVA by PF and you get 13.8 MW.
To answer this question a current value needs to be given. 125000 is the product of amps times volts. I = W/E = 521 amps. So to bring 240 volts up to 125 KVA you need the circuit load to draw 521 amps.
Do you mean 'megavolt ampere' (MV.A) or 'millivolt ampere' (mV.A)? By using the incorrect symbol ('mva'), this is not clear.To determine the apparent power, in volt amperes, you divide the true power, in watts, by the power factor of the load. One volt ampere is one-millionth of a megavolt ampere ('MV.A' -not 'mva') -assuming you don't mean 'millivolt ampere' ('mV.A')!
125
kva*cos(phase angle)
Transformer does not convert MVA to KV. MVA is unit of power, where as KV is unit of Voltage. Transformer converts voltgae. Step up or Step down.
5kw = 6.25 kva becoz kva = kw/ pf if we take pf is o.8
To convert amps to kVA, you use the following formula: Amps = (kVA x 1000 / voltage) / 1.73
A 132 kV substation is normally called a grid substation. It would normally use two or more 132/33 kV transformers rated at 90 MVA, or two or more 132/11 kV transformers rated at 30 MVA.
You cannot convert them. KVA is a measure of power, while amperes are a measure of current.
a kva is 1000 vaK is kilo, which means 1000 similar to how a kilometer is 1000 metersTransformers are usually rated in KVA, so a 45 KVA Transformer is a 45 000 VA Transformer