The initial suggested options were presented by the Chairman: Dual logo with IEC (they are revising the standard now) Do our own where we develop it on our own Do our own guide where we take the wording from the new IEC guide that fits with IEEE Add wording to some other IEEE Std or guide (C57.12.90?) Joe presented again the background of the short circuit design criteria request: Transformers must be designed for short circuit but what is the criteria to use? Can we have agreed upon design limits? The IEC is a baseline guide and is not mandatory and IEEE should consider to have something similar There was discussion on the subject from manufacturers and users: Main issue is the interpretation of the calculated results (Sanjay Patel) IEEE should not tell manufacturers how to design transformers for SC (Waldimar Ziomek) CSA has agreed to follow the IEC A as a guideline (Waldimar Ziomek) KEMA short circuit testing for the last 15 years shows that 1 in 4 fail and that the failure is not always in the windings (Shankar Subramany) The manufacturing is very important with regards to short circuit (Joe Foldi) Each company has its own design calculations that are validated by testing (Vinay Mehrota) Should we the highest or lowest criteria? This will be difficult to get consensus on (Krzysztof Kulasek) We should do our own guide based on IEC and keep in contact with IEC to harmonize as much as possible (Jason Varnell) Users are happy with any option as long as they follow some criteria Some users have criteria already in their specs A motion IEEE to go in the direction of producing an IEEE guide that uses input from the IEC “for guide” was initiated by Bill Boettger and seconded by Joe Foldi. This motion passed by 15 to 1 votes. The meeting was adjourned at 6.00 pm (motion initiated by Markus Schiessl and seconded by Bill Boettger)
The initial suggested options were presented by the Chairman: Dual logo with IEC (they are revising the standard now) Do our own where we develop it on our own Do our own guide where we take the wording from the new IEC guide that fits with IEEE Add wording to some other IEEE Std or guide (C57.12.90?) Joe presented again the background of the short circuit design criteria request: Transformers must be designed for short circuit but what is the criteria to use? Can we have agreed upon design limits? The IEC is a baseline guide and is not mandatory and IEEE should consider to have something similar There was discussion on the subject from manufacturers and users: Main issue is the interpretation of the calculated results (Sanjay Patel) IEEE should not tell manufacturers how to design transformers for SC (Waldimar Ziomek) CSA has agreed to follow the IEC A as a guideline (Waldimar Ziomek) KEMA short circuit testing for the last 15 years shows that 1 in 4 fail and that the failure is not always in the windings (Shankar Subramany) The manufacturing is very important with regards to short circuit (Joe Foldi) Each company has its own design calculations that are validated by testing (Vinay Mehrota) Should we the highest or lowest criteria? This will be difficult to get consensus on (Krzysztof Kulasek) We should do our own guide based on IEC and keep in contact with IEC to harmonize as much as possible (Jason Varnell) Users are happy with any option as long as they follow some criteria Some users have criteria already in their specs A motion “for IEEE to go in the direction of producing an IEEE guide that uses input from the IEC guide” was initiated by Bill Boettger and seconded by Joe Foldi. This motion passed by 15 to 1 votes. The meeting was adjourned at 6.00 pm (motion initiated by Markus Schiessl and seconded by Bill Boettger)
S16-AnnexJ-PerformanceCharacteristicsSC.docx