| Arc Flash Forum https://brainfiller.com/arcflashforum/ |
|
| Scott Connected Tranfomer Model https://brainfiller.com/arcflashforum/viewtopic.php?f=23&t=2254 |
Page 1 of 1 |
| Author: | Soud Laskar [ Mon May 21, 2012 10:00 am ] |
| Post subject: | Scott Connected Tranfomer Model |
We have several two-phase transformers in our plant and I need to model them for our arc flash study. I found some old drawings that provide the following data: 2-167KVA TRANSFORMERS SCOTT CONNECTED 13.2 KV 3PHASE TO 240/480V 2PHASE I am using ESA Easypower but any general guidence would be very helpful. Thank you! |
|
| Author: | PaulEngr [ Sat May 26, 2012 2:53 pm ] |
| Post subject: | |
Available arc flash models generally consider 3 phase only. Considering that the fault energy is identical for single or two phase cases with L-L faults, the 3 phase model results are still valid. |
|
| Author: | JayWes38 [ Mon May 28, 2012 2:58 pm ] |
| Post subject: | |
PaulEngr wrote: Available arc flash models generally consider 3 phase only. Considering that the fault energy is identical for single or two phase cases with L-L faults, the 3 phase model results are still valid. PaulEngr wrote: Available arc flash models generally consider 3 phase only. Considering that the fault energy is identical for single or two phase cases with L-L faults, the 3 phase model results are still valid. Soud Laskar wrote: We have several two-phase transformers in our plant and I need to model them for our arc flash study. I found some old drawings that provide the following data:
2-167KVA TRANSFORMERS SCOTT CONNECTED 13.2 KV 3PHASE TO 240/480V 2PHASE I am using ESA Easypower but any general guidence would be very helpful. Thank you! |
|
| Author: | mdy [ Mon Jun 04, 2012 10:06 am ] |
| Post subject: | |
My initial thougth was "open Delta". However, admittedly I've never heard the term, "Scott Connected". Since I'm always eager to learn, I can't wait to fine out what that refers to! Thanks. |
|
| Author: | JBD [ Mon Jun 04, 2012 3:57 pm ] |
| Post subject: | |
A Scott Connection involves the use of two transformers connected in a Tee arrangement which acts as if it was a delta-wye. The Scott connection was designed for going between 3-phase and 2-phase systems, although it has become synonymous with any "T" connection. The T arrangement is very popular in small kVA ratings (i.e. <30kVA). A 208Y120 output effectively requires one 240V winding tapped at 50% and 86.7% and the other tapped at 86.7% and 25%. |
|
| Page 1 of 1 | All times are UTC - 7 hours |
| Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |
|