For the RLC Network Program PSpice

An arc­ing fault can­not be com­plete­ly avoid­ed when oper­at­ing elec­tri­cal sys­tems. It caus­es an extra­or­di­nary load for the sys­tem and the sys­tem build­ing and can also endan­ger per­sons in atten­dance. The deter­mi­na­tion of the result­ing over­pres­sure in the sys­tems and the sur­round­ing rooms is only pos­si­ble by a pres­sure cal­cu­la­tion. Fur­ther­more, the effect of an installed pres­sure relief open­ing in the sys­tem room can be deter­mined in the event of an arc fault.

Depend­ing on geo­met­ric dimen­sions, mate­r­i­al prop­er­ties of air or SF6 and the per­for­mance data of the arc, the crit­i­cal pres­sures in a switchgear and its enclos­ing spaces can be cal­cu­lat­ed with­out exper­i­men­tal effort using a pres­sure cal­cu­la­tion model.
Our com­pa­ny has devel­oped a pres­sure net­work library based on the pres­sure net­work method with which the required result can be achieved in a short time and with less effort com­pared to exper­i­ments and oth­er cal­cu­la­tion meth­ods. In a mod­el, the pres­sure prop­a­ga­tion process­es are sim­u­lat­ed anal­o­gous­ly to an elec­tri­cal network.

In a vari­ety of appli­ca­tions, pro­duc­ers and oper­a­tors of elec­tri­cal sys­tems could be safe­ly guid­ed through the arc fault test and pre­dic­tions of over­pres­sures could be made in sys­tems erect­ed on site. Among oth­er things, the pres­sure dis­tri­b­u­tions at dif­fer­ent cur­rent and relief open­ings of medi­um-volt­age switchgear, con­crete sta­tions, con­vert­er cab­i­nets and trans­former con­nec­tions were simulated.

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