Analysis of an effective magnetic field in a contact gap of a heavy loaded reed

Studies of a spatial magnetic field variation within a contact gap of the reed operated under heavy load are reported. The influence of such factors as reed and driving coil parameters as well as contact current value have been investigated. The calculations were carried out using the electronic theory of magnetism and were verified by experiment. On the basis of the results, conclusions about the admissible contact loading of the available standard dry reeds are formulated.