OIL PROTECTIVE RELAY von GROZDANOV,TONI D, POLITOV,LJUBEN T, DENIREV,PETR V, DIMITROVA,TEMENUZHKA JJ

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MECHANISM FOR DIGITAL INDICATION OF POSITION AND ACTUATING THE FINAL BLOCKING OF STEPWISE TYPE REGULATOR MOTOR DRIVING von SKRINSKI,VENCISLAV V, GROZDANOV,TONI D, IVANOV,CHAVDAR B, POLITOV,LJUBEN T

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A MECHANISM WITH INTERRUPTED ACTION FOR A SELECTOR OF STEP- BY- STEP REGULATOR OF TENSION von GROZDANOV,TONI D, POLITOV,LJUBEN T, GEORGIEV,GEORGI J, KHRISTOV,STOJAN D, DEMIREV,PETR V

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A THREE- PHASE STEP- BY- STEP REGULATOR WITH ISOLATED PHASE von SKRINSKI,VENCISLAV V, GROZDANOV,TONI D, IVANOV,CHAVDAR B, POLITOV,LJUBEN T, NAKOV,ATANAS S, GANCHEV,IVAN R

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ELECTRICAL APPARATUS FOR CONTROL OF MOTOR DRIVE OF STEP REGULATORS OF TENSION von SKRINSKI,VENCISLAV V, GROZDANOV,TONI D, IVANOV,CHAVDAR B, POLITOV,LJUBEN T, GEORGIEV, GEORGI J, KHRISTOV,STOJAN D, KHUBANOV,VESELIN K, PETKOVA,NAJJDA D

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FORCE TRANSDUCER DRIVEN BY STEP-BY-STEP VOLTAGE REGULATOR MOTOR von PETKOVA,NA.IDA D, SKRINSKI,VEN.SISLAV V, GROZDANOV,TONI D, GEORGIEV,GEORGI.I, POLITOV,LJUBEN T, CHRISTOV,STOJAN D, CHUBANOV,VESELIN C, IVANOV,CZAVDAR B

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A STEP-BY-STEP REGULATOR'S SELECTOR SPECIFICALLY FOR DELTA-CONNECTED TRANSFORMER WINDINGS von PETKOVA,NA.IDA D, SKRINSKI,VEN.SISLAV V, STOJANOV,STOJAN T, GROZDANOV,TONI D, NIKOLOV,STANO C, KO.SEV,KIRIL N, POLITOV,LJUBEN T, CHRISTOV,STOJAN D, BO.IKOV,TODOR B, GEORGIEV,GEORGI.I.<BG, CHUBANOV,VESELIN C, IVANOV,CZAVDAR B

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A POWER SWITCH FOR A 3-PHASE STEP REGULATOR WITH INTER-INSULATED PHASES von PETKOVA,NA.IDA D, SKRINSKI,VEN.SISLAV V, STOJANOV,STOJAN T, GROZDANOV,TONI D, NIKOLOV,STANO C, KO.SEV,KIRIL N, GEORGIEV,GEORGI.I, POLITOV,LJUBEN T, CHRISTOV,STOJAN D, BO.IKOV,TODOR B, CHUBANOV,VESELIN C, IVANOV,CZAVDAR B

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