Square D Transformer Damage Curves
- Thread starter robgrant3
- Start date
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Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
Rob
You may be better off trying to get that info through an email to SQD.
You may be better off trying to get that info through an email to SQD.
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
Any software you may be using will have a typical curve which is pretty darn close to what you would get for a specific model, unless it is some special custom unit.
zog
Senior Member
- Location
- Charlotte, NC
robgrant3 said:
What software are you using?
mayanees
Senior Member
- Location
- Westminster, MD
- Occupation
- Electrical Engineer and Master Electrician
use the SKM damage curve
use the SKM damage curve
IMO, the SKM damage curve, being based on transformer impedance and X/R ratio, is all you need.
If you want maximum accuracy, contact the factory to get the transformer test data, including impedance and X/R ratio measured values.
JM
use the SKM damage curve
IMO, the SKM damage curve, being based on transformer impedance and X/R ratio, is all you need.
If you want maximum accuracy, contact the factory to get the transformer test data, including impedance and X/R ratio measured values.
JM
weressl
Esteemed Member
mayanees said:
..and see how much that changes your results.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
robgrant3 said:
That is true, but the parameters to construct the curve do not exist until the transformer has been built and tested at the factory. You pay extra to get this type of data.
mayanees
Senior Member
- Location
- Westminster, MD
- Occupation
- Electrical Engineer and Master Electrician
Quote:
Originally Posted by mayanees
IMO, the SKM damage curve, being based on transformer impedance and X/R ratio, is all you need.
If you want maximum accuracy, contact the factory to get the transformer test data, including impedance and X/R ratio measured values.
JM
Quote: by Laszlo
..and see how much that changes your results.
__________________
... which (I believe) is his way of saying that there is little to no change in the appearance of the ANSI damage curve when using the actual measured values versus the SKM defaults.
I suggested this because I've done studies for the Air Force where they would not accept the Power Study unless the actual measured values were used. So if your intention is to be completely anal about construction of the damage curve - contact the factory to get the measurements. It's as accurate as you can get.
JM
Originally Posted by mayanees
IMO, the SKM damage curve, being based on transformer impedance and X/R ratio, is all you need.
If you want maximum accuracy, contact the factory to get the transformer test data, including impedance and X/R ratio measured values.
JM
Quote: by Laszlo
..and see how much that changes your results.
__________________
... which (I believe) is his way of saying that there is little to no change in the appearance of the ANSI damage curve when using the actual measured values versus the SKM defaults.
I suggested this because I've done studies for the Air Force where they would not accept the Power Study unless the actual measured values were used. So if your intention is to be completely anal about construction of the damage curve - contact the factory to get the measurements. It's as accurate as you can get.
JM
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