Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations JStephen on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. powercontroller

    Transformer inrush current while switching off

    My initial thoughts were that the phenomenon was due to inrush currents. However, the theory of sequential interruption of current of differnt poles explains the observed currents. The system is a three wire system, with no neutral. All transformer star points are, however, connected to...
  2. powercontroller

    Transformer inrush current while switching off

    Here is the waveform file that I was not able to attach to the previous post.http://files.engineering.com/getfile.aspx?folder=7760acf3-c704-43ba-8e2a-a6a36fab9d69&file=Middle_of_pulse.pdf
  3. powercontroller

    Transformer inrush current while switching off

    Hi Bronzeado, The event that occurred was a bit more complex than what I described in my previous email. The setup basically consists of a number of generators connected to a common 33 kV busbar by means of star delta transformers (Star winding is on the 33 kV side, with a solid connection to...
  4. powercontroller

    Transformer inrush current while switching off

    Thank you for all your posts. The actual problem that we experienced occurred in a power station when one of the generator transformers was disconnected from the 33 kV busbars. The other generator transformers, that are also star connected on the 33 kV side, detected a 20 ms current flow...
  5. powercontroller

    Transformer inrush current while switching off

    Many discussions are found on inrush current when energising a power transformer. Has anyone got any experience of a current unbalance on the star-point to ground connection during the instant that a transformer was switched off ? Has any analysis been done on the currents that exist as the...

Part and Inventory Search

Back
Top