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  1. vangiang

    500kV Surge arrester (MOV)

    Thank you, Bahram7. A B -O--------------------O-- When breaker A closed and breaker B still opened, maybe the highest voltage will drop on MOV of B. In restricted case, this switching voltage is about 3pu (3x449kV)in 500kV system. You may be right. Could you tell me about...
  2. vangiang

    500kV Surge arrester (MOV)

    Hi Bahram7, Could you talk clearly about "If you do fast reclosing (0.5 s) on long lines you need to make sure about the arresters energy capability" ? Thanks, Van Giang
  3. vangiang

    500kV Surge arrester (MOV)

    Hi Gunar, I really want to find the document around this problem. When we close the EHV Tranmission line, the switching overvoltage is big problem and in this case the pre-insert resistor is one of a choice. However this solution is very expensive. Normally, MOV (surge arreter) for line feeder...
  4. vangiang

    500kV Surge arrester (MOV)

    Dear All, I have a problem about using 500kV MOV for replacing pre-insert resistor of 500kV CB . Does anyone have document, calculation method, ... or experience this problem. Thank you Van Giang
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