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Forces on DS terminals in HV substations

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Power0020

Power0020

Electrical
Joined
Jun 11, 2014
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303
Location
AU
In IEC world, a 220 kV SS with a single bus configuration, I want to cross under the station busbar with AL tube supported by disconnctors of two feeders opposite sides of the bus.

I did a SC forces calculations and it seems the dynamic forces due to short circuit current exceed manufacturer's recommendation.

Capture_d0dxts.jpg


I am a bit confused with the term : cross load Fb? I got a dynamic force of 988 N with both sides simple supported (sliding connector), it seems a bit marginal tho!

Any clue?
 
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I think "cross load" is lateral load.
 
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