FIELD: electrical engineering; check-up systems for outdoor lighting lines. SUBSTANCE: method involves short-time energy transfer to phase A wire by its conveying from phase C that is 120 deg. ahead of phase A, since the moment of phase A supply voltage crossing zero; energy is transferred from power transformer winding. EFFECT: provision for shaping information pulses with supply voltage turned on and off. 2 cl, 3 dwg
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|---|---|---|---|
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|
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