ctpt
Electrical
- Mar 9, 2004
- 29
There is a system where two transformers are connected in series. There is an existing transformer of 150 kVA (480V/4.16kV) in an offshore platform. This transformer feeds a new platform at 4.16kV through subsea cable and connects to a new transformer of 200kVA ,4.16kV/480V. (I have no idea why the new transformer is of bigger capacity than the upstream). Now the question is whether the inrush current for the 200kVA transformer will be multiple of its own IFL (say 12times @0.1 sec.) or it would be 12 times the IFL of 150kVA transformer. Is inrush current dependent only on its own rating irrespective of the upstream system capacity?