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.