FIELD: electricity.
SUBSTANCE: application: for field instrument powering. Electronic unit of field instrument contains current stabiliser with current flowing in it under action of supply voltage provided by external current source, internal operating-analysing circuit for field instrument control and internal feed circuit. Feed circuit comprises voltage regulator through which at least temporarily the first partial feed current flows and which provides electronic unit of field instrument with the first internal useful voltage which is essentially constantly adjusted and is kept on preset level, and the second voltage regulator over which at least temporarily the second partial feed current flows which provides electronic unit of field instrument with the second useful voltage varying within preset range, and voltage stabiliser through which at least temporarily the third partial feed current flows and which serves for adjusting and keeping internal input voltage on preset level. In operating-analysing circuit at least temporarily both the first useful current under action of the first useful voltage and the second useful current under action of the second useful voltage flows.
EFFECT: increase in efficiency factor of field instrument with power consumption optimization.
41 cl, 13 dwg
