FIELD: electricity.
SUBSTANCE: application: in automation systems for feeding field instruments. Electric circuit (S) of automation system field instrument (F1) feeding consists of load loop (VS), constant voltage converter (G) and input loop a (ES) with double-wire connection (A). Input loop (ES) consists of modulator (M) connected with current stabiliser circuit (RS) and constant voltage converter (G). Modulator (M) controls converter (G) of current constant voltage so that controlled total current (Is) is accepted by double-wire connection (A). Optimum power transfer to load loop (VS) is possible using controlled constant voltage converter (G).
EFFECT: device simplification and power losses reduction.
7 cl, 4 dwg
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