FIELD: computer engineering, power production, in particular, for automatic choice of current leads according to heating conditions. SUBSTANCE: device has unit 1 which models load current, squarer 2, first, second and third digital-to-analog converters 7, 9 and 3, first and second clipping resistors 8 and 4, direct current amplifiers 5, 10, 21, 30, differentiating circuits which contain parallel circuits of resistors 11- 12 and capacitors 13-14. In addition device has group of commutators 15-18, group of scaling resistors 19-20, 28-29, feedback resistors 5, 22, 31, adder 23, inverter 24, device output 25, comparator 26, analog-to-digital converters 32, 35, multiple- position switches 27, 33, reference voltage source 34, counter 36, OR gate 37, device start input 38, timer 39, signal indicator 40, average load current setter 41, indication unit 42, decoder 43. EFFECT: increased precision. 4 dwg
