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Influence of Arc Energy Absorbers on the Enclosure Effect in Case of Internal Arcing in Electrical Installations
1 : Institute for High Voltage Technology, RWTH Aachen University
Institute for High Voltage Technology, RWTH Aachen University, Schinkelstr. 2, 52056 Aachen -
Germany
2 : Transmission System Engineering Division, Electricity Generating Authority of Thailand
(EGAT)
* : Corresponding author
Nonthaburi 11130, -
Thailand
Internal arcs in switchgear cause flows of hot gas between the faulty switchgear compartment and the switchgear room. Arc energy absorbers in- stalled in between have two effects on pressure development in the room, pressure reduction by heat absorption and pressure rise by increased energy input due to flow resistance. This interac- tion is investigated for boundary conditions of a typical compact substation by varying the effi- ciency of heat absorption and the value of the effective absorber opening. It is demonstrated that for certain parameter combinations the ab- sorber does not reduce overpressure.
