Hi Ralph,
Thanks for your time. The information you and dpc shared are very helpful. Now I have a rough idea where to start and how to proceed with my design work where I puzzled. Also, I have gone through the website www.expert.ecmweb.com where Mr. Tony Locker had answered many such questions...
Thanks for your queries.. Ralph and Cory, very sensible. The system scenario is like this... 4 generators are to be connected to a common 11kV double bus switchboard. We are planning to have three such systems like this for the proposed power station. This means there will be 12 generators and...
Can anyone quickly advise which standards give design criteria for the use of zig zag earthing transformers for an 11kV ungrounded system (sizing of the transformer)?
Thanks for your advise in advance
Surendran