MAIN CHARACTERISTICS OF NONCONTACT CONVERTERS OF LARGE CURRENTS WITH LONGITUDINALLY DISTRIBUTED PARAMETERS FOR CONTROL AND MONITORING SYSTEMS

Abstract

The article shows that the necessity of breaking current circuits to temporarily switch on electric measuring instruments, the presence of large power losses on shunts, undesirability or impossibility under technological process conditions of breaking circuits, as well as safety requirements have caused noncontact conversion and measurement of large direct currents in circuits without breaking them in metallurgy, electrochemical industry, railway transport, melioration, irrigation and in general in agriculture. The results of the development of one of them are presented in the paper. Considered its static characteristic, the error of calculation, which does not exceed 3 percent, its degree of nonlinearity, and its average and current sensitivity, which throughout the range of current transformed practically remain constant in magnitude. The developed galvanomagnetic noncontact converter can be widely used in control and management systems in water supply, melioration, and irrigation, industry, railway transport, metallurgy, science, engineering, as well as for the verification of electric meters at the place of their installation for non-contact control of direct and alternating currents.