Grounding Transformer
Grounding Transformer
(OP)
Any of you could help me to find out how to calculate a grounding transformer to a generator ?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Grounding Transformer
There are some good references - Protective Relaying by Blackburn might be a good starting point.
RE: Grounding Transformer
I could calculate the power transformer considering steady state, which would be very easy. But I what I have read shows that the grounding transformers are designed to take from 1 to 10 minutes on lack. In my case, I want to Dimenssion it for 1 minute. I think there should be a methodology or a standard rule for this, which I know of. So I'm asking for help.
More specifically, I want to calculate a grounding transformer for a 70MVA generator. The maximum fault current that must circulate through the center star in case of a fault (short circuit) to ground is 10A. The voltage-phase generator is 13.8kV, and the grounding transformer must be able to suport a falt condition to the ground for one minute at most.
Tank you for your help.
RE: Grounding Transformer
Alan
----
"It's always fun to do the impossible." - Walt Disney
RE: Grounding Transformer
What you are talking about is better described as a neutral grounding transformer for a high-resistance grounding system.
RE: Grounding Transformer
Thank you one more time!!