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Lightning A or Surge A?

Lightning A or Surge A?

Lightning A or Surge A?

(OP)
Hi,

what is the main purpose? if you install a Lightning Arrester (or Surge Arrester?) with a power transformer 150/20 kV 60 MVA on HV side.
as lightning protection or switching ?

best regards

 

RE: Lightning A or Surge A?

To protect the transformer windings from lightning induced high voltage surges in the transmission lines by shunting such surges to ground.

RE: Lightning A or Surge A?

IEEE changed the name from "lightning arrester" to "surge arrester" a long time ago.  It protects against transient voltage surges, regardless of the source.  


 

RE: Lightning A or Surge A?

Depends on where you live.  Some areas have little lightning activity and switching surges would dominate.

Correct answer is both lightning and switching surges.

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