Short Circuit MVA 1

[tulum]

The job I am working on has the following in the specification...

THe main input power has the following characteristics:

(1) Voltage: 2400VAC, 3P, 60Hz, 3W Y reactor Grounded
(2) PF: 0.8 Lagging
(3) Fault Level on 2400V: 25kA, 103.9MVA (RMS Symmetrical)

My question is; Does the MVA make sense? This looks more like the MVA at 4160??

Not to sure

Regards,
TULUM

 

[l3city]

that's your power, (103.9 Mega-Volt-amperes) at 2400V, 25 kilo-amps, 3phase. Seems ok to me, or be more specific, why do you think this makes no sense?
Regards

 

[tulum]

Sorry,

My big finger on my calculator gave me a different answer that coincidentally workout at the 4160V level not 2400V...

my bad...

Regards,
TULUM

 

[waross]

Is this a 2400/4160 volt system?
If so the fault current may be calculated at 4160, rather than 2400, and the 103.9 MVA looks right.
respectfully

 

[VxA]

I guessing you left out the sqrt 3 factor, but seems like you've got it tracked down now.

 

[tulum]

Yup...

Another OOOPS! Thanks for the help guys...

Regards,
TULUM