Theoretical basis of the design of magnetic field generator for DC vacuum circuit breakers

The magnetic field generator (MFG) for producing the transverse magnetic field switching off direct current in a vacuum chamber has been presented in the article. The method of calculating generator coils inductance for different geometrical dimensions and various systems of coils connections, assuming the maximization of the magnetic flux density value in the contact gap and the maximization of the vacuum chamber switching ability has been presented. The possibilities of the MAG computer program for designing magnetic field generators have been described