Good evening,
I am working on a project with generator, 650kW, 480/277V.
I have questions regarding generator voltage drop. I have read some articles in Internet and this forum and and one of them I copied below.
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Originally Posted by bob
I most cases you could say that, but since your distance is so long you need to take into account the generator VD. A typical Xd' = 0.15.
125 amps x .15 x 1.73 = 33 volts. Check the genny and get the correct value.
It may be a smaller value.
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In my case, from generator cut sheet Xd? = 0.1798 is per unit
Xd?=0.0552 ohms
It means -> 1000 amps x 0.1789 x 1.73 = 309.5 volts.
Is this voltage drop correct or I made a mistake?
Moreover, the generator is about 400 ft away from the building.
I am definitely lost how to handle this issue.
Please advise, any thoughts will be great appreciated.
Thank you in advance.
I am working on a project with generator, 650kW, 480/277V.
I have questions regarding generator voltage drop. I have read some articles in Internet and this forum and and one of them I copied below.
-----------------------------------------------------------
Originally Posted by bob
I most cases you could say that, but since your distance is so long you need to take into account the generator VD. A typical Xd' = 0.15.
125 amps x .15 x 1.73 = 33 volts. Check the genny and get the correct value.
It may be a smaller value.
------------------------------------------------------------
In my case, from generator cut sheet Xd? = 0.1798 is per unit
Xd?=0.0552 ohms
It means -> 1000 amps x 0.1789 x 1.73 = 309.5 volts.
Is this voltage drop correct or I made a mistake?
Moreover, the generator is about 400 ft away from the building.
I am definitely lost how to handle this issue.
Please advise, any thoughts will be great appreciated.
Thank you in advance.