electricwizard
Electrical
Hi,
I'm needing to rely on some typical impedance information for a three-winding transformer simply to use as a reference whilst awaiting inputs from the TX vendor. This is taking an unreasonably long time to get information and the project timeframe is being impacted.
This is a 3.3/6.6kV 7/7/1MVA transformer with YNyn0+d1 vector group used in a power station supplying auxiliary equipment. From the TX test results, only one set of HV-LV impedances have been measured for the positive (8.36%) and zero sequence impedance (7.92%). I am missing the positive and zero sequence impedances between HV-MV, MV-LV etc.
If anyone has some typical information to share, possibly of a similar transformer rating that would be much appreciated.
I'm needing to rely on some typical impedance information for a three-winding transformer simply to use as a reference whilst awaiting inputs from the TX vendor. This is taking an unreasonably long time to get information and the project timeframe is being impacted.
This is a 3.3/6.6kV 7/7/1MVA transformer with YNyn0+d1 vector group used in a power station supplying auxiliary equipment. From the TX test results, only one set of HV-LV impedances have been measured for the positive (8.36%) and zero sequence impedance (7.92%). I am missing the positive and zero sequence impedances between HV-MV, MV-LV etc.
If anyone has some typical information to share, possibly of a similar transformer rating that would be much appreciated.