DEVICE FOR HOLDING INSULATION OF WINDINGS OF THREE-PHASE ASYNCHRONOUS MOTOR WINDINGS IN TECHNOLOGICAL PASS

FIELD: electrical engineering.SUBSTANCE: invention relates to devices intended for drying of three-phase asynchronous motor windings insulation in process pause, and can be used for protection of three-phase asynchronous electric motors operating in rooms with high humidity and outdoors. Device comprises three three-phase capacitors with three leads at each, on one side connected to outputs of three-phase power supply, on the other side connected to three leads of three-phase asynchronous motor, three-phase contactor, according to the invention, comprises a main, connected to a power source, and an additional three-phase circuit breakers connected to the main one, wherein input three leads of main circuit breaker are connected to three leads of power supply, respectively, and output three outputs are respectively with three input terminals of additional automatic circuit breaker and with three input leads of contactor, wherein the first and second terminals of the first three-phase capacitor are connected to the first and second output terminals of the additional automatic circuit breaker, respectively, and third lead of first three-phase capacitor is connected to third lead of three-phase asynchronous electric motor, wherein first and second leads of second three-phase capacitor are connected to first and third output terminals of additional automatic circuit breaker, respectively, and third output of second three-phase capacitor is connected to second output of three-phase asynchronous electric motor, also first and second outputs of third three-phase capacitor are connected to third and second output terminals of additional automatic circuit breaker, respectively, and the third output of the third three-phase capacitor is connected to the first output of the three-phase asynchronous motor, where the three outputs of the contactor are respectively connected to three outputs of the three-phase asynchronous motor.EFFECT: technical result is higher reliability of operation due to exclusion of resonance of current on harmonic with high frequency, higher stability of wind drying device.1 cl, 1 dwg Изобретение относится к электротехнике, а именно к устройствам для подсушки изоляции обмоток трехфазного асинхронного электродвигателя в технологической паузе, и может быть использовано для защиты трехфазных асинхронных электродвигателей, работающих в помещениях с повышенной влажностью и вне помещений. Техническим результатом является повышение надежности работы за