The pressure network library is a powerful, self-explanatory component with which the user is able to independently dimension a wide variety of pressure systems on the basis of the RLC network program OrCad PSpice.
In order to calculate the developing pressures, a distinction must be made between different processes. The arc power is a decisive influencing factor for the pressure development in electrical systems and system rooms and must be determined as accurately as possible before a pressure calculation is carried out. For the pressure development in the system, the arc power resulting from the product of the arc voltage and the arc current must be taken into account. However, these parameters are dependent on the network and geometry. The complete electrical energy is:
- transfered into pressure,
- used to melt the electrodes,
- an energy supplier for the chemical reactions and
- in addition, this power is emitted to the encapsulation via radiation.
The pressure conversion is described by the transfer coefficient, which is influenced by the following parameters:
- arc length,
- arc voltage
- arc current and
- gas density.
This simulation is possible in the media air, nitrogen (N2) and sulfur hexaflouride (SF6), thus the pressure can be resolved in space and time.
The pressure waves, i.e. the runtime effects of travelling waves in the gas and reflections on the building walls, are taken into account with the aid of travelling wave elements in the pressure network. This allows the pressure to be resolved spatially and temporally.
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