I'm trying to calculate the X0/R0 ratio of a Zig Zag transformer. I got the following information:
-Winding connection: Zig Zag
-Short time neutral current: 3500 A 5 sec.
-Continuous neutral current : 250 A
-Voltage : 26.4 kV
-Zero sequence impedance: 7.5 ohms/ph
-No load losses: 1951 W
-Load...
The IEEE 141-1993 states that in general, the transformer inrush current is approximately 8 to 12 times the transformer full-load current for a maximum period of 0.1 s. However, in the IEEE 242-2001 only mention 12 times the transformer FLC. I see frequently engineer using 8 times FLC as inrush...
Hi,
This question has already been posted in two other threads, but the answers provided were not really helpful.
In Neher-Mcgrath and IEC 60287, it is stated that the ambient temperature is the soil temperature at cable laying depth. As I understand it, those methods consider an isothermal...
