- این موضوع 3 پاسخ، 1 کاربر را دارد و آخرین بار در 2 سال، 9 ماه پیش بدست بهروزرسانی شده است.
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موضوع
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We have experienced unduly trips of a Stand By Earth Fault relay which uses the residual connection of the three phase CT's on primary side of 6.5 MVA 11/3.3KV Dyn11 transformer. …
We have experienced unduly trips of a Stand By Earth Fault relay which uses the residual connection of the three phase CT's on primary side of 6.5 MVA 11/3.3KV Dyn11 transformer.
We cannot increase the setting much as we will affect the coordination with upstream protections, we thus decided to insert a stabilizing resistor, the client agreed but wish to have the same settings as before but instantaneous, we think that the stabilizing resistor does not impose that and would prefer to strick to the actual settings with Io> using A VI curve and Io>> with 300 mSec delay. Can you pls advice?
- شما برای پاسخ به این موضوع باید وارد شوید.