Avral 2.1

Avral - the program is designed for automated calculation of a single-phase short circuit in the power supply network with a dead-earthed neutral rated voltage ~ 380/220 V and a frequency of 50 Hz.

The program includes the resistances of the most common power transformers of the TM brand with a nominal capacity of 25&hellip,1000 kVA. The connection scheme of the transformer windings can be selected: star / star-zero, triangle / star-zero, star / zigzag-zero. Electrical networks can be made by air and/or cable, aluminum or copper, with and without parallel laying. The cross sections of the copper conductors used are equal to 1.5&hellip,240 sq.mm., aluminum - 2.5&hellip,240 sq.mm.

The program allows you to take into account the reduction of the single-phase short circuit current (OKZ) by introducing into the calculation of the resistance of the electric arc and the transient resistance of the contacts.

It is intended for specialists in the design of networks and power supply systems of residential, public and industrial buildings.