METHOD OF MONITORING CONNECTIONS IN A DEVICE FOR DETERMINING A DAMAGED FEEDER IN NETWORKS WITH NEUTRAL, EARTHED THROUGH AN ARC-SUPPRESSION COIL

FIELD: electrical engineering.SUBSTANCE: invention relates to electrical engineering, in particular to relay protection and emergency automatics of electric networks with neutral, earthed through arc suppressing controlled reactor, and can be used to control presence and correctness of connection of connections to directly connected on object detection device of damaged feeder (DDF) without disconnection of connection from network for diagnostics of assembly accuracy of each monitored connection at stage of debugging or during repair of DDF device. In the connection circuits a transient process is initiated in the form of damped oscillations of voltage and current of zero sequence, respectively, 3Uo and 3Io, by supplying voltage pulse with amplitude of 300 V into the control winding of the arc-suppressing reactor. Presence of voltage 3Uo and currents 3Io is checked in the controlled connection at corresponding inputs of DDF device. Polarity of connecting to the DDF device is checked. For each controlled connection, polarity of the first half-wave of current amplitude 3Io is fixed relative to polarity of connection of voltage 3Uo to corresponding input of DDF device. Correctly connected are controlled connections, in which polarity of the first half-wave of current 3Io does not coincide with polarity of connection of voltage 3Uo to device DDF, leading to device actuation.EFFECT: simple setup of a DDF device connected directly to a network on an object, shorter setup time, high safety of operations, broader functional capabilities owing to possibility of simultaneous inspection of mounting of several connections.1 cl, 4 dwg Изобретение относится к электротехнике, в частности к устройствам релейной защиты и противоаварийной автоматики электрических сетей с нейтралью, заземленной через дугогасящий регулируемый реактор, и может быть использовано для контроля наличия и правильности подключения присоединений к непосредственно подключенному на объекте устройству определения поврежденного фидера (ОПФ) без отключения присоединения от сети для выполнения диагностики правильности сборки каждого контролируемого присоединения на стадии отладки или при ремонте устройства ОПФ. Сущность: в цепях присоединений инициируют переходный процесс в виде затухающих колебаний напряжения и тока нулевой последовательности, соответственно 3Uo и 3Io, путем подачи в обмотку управления дугогасящего реактора импульса напряжения амплитудой 300 В. Проверяют в контролируемом присоединении на