Method and system for measuring interphase transverse magnetic field between vacuum circuit breaker contacts and medium

The invention discloses a method and system for measuring an interphase transverse magnetic field between vacuum circuit breaker contacts and a medium. The method comprises the following steps: establishing a three-phase model of the vacuum circuit breaker; calculating magnetic field space-time distribution of a plane between each phase of the three-phase model and the contact when the current is applied; removing the influence of a transverse magnetic field generated by the conducting rod, and calculating the self-generated magnetic field distribution of each single phase when current is only applied to the single phase; and subtracting the self-generated magnetic field distribution of the single phase when the current is only applied to each single phase from the magnetic field space-time distribution of the plane between each phase of the three-phase model and the contact when the current is applied to obtain the external transverse magnetic field of the phase. Through the method, the transverse magnetic f