DEVICE FOR AUTOMATIC CONTROL OF CURRENT DISTRIBUTION MODES IN LOW-VOLTAGE ELECTRIC NETWORKS

摘要

The invention relates to measuring technique and is meant for contact-less measurement of current in 0.4 kV AC low-voltage distribution networks and transmission of results of measurements through a wireless network. A device for automatic control of current distribution modes in settlement electric networks comprises a current sensor connected to a wireless data transmission device, a control unit connected to a local computer network, the current sensor is made as a magnetic core formed by two ferrite semi-rings encircling a conductor. The wireless device comprises a receiving-transmission antenna, whose output is connected to SHF receiver, whose output is connected to an output of switch, which supplies power from a rectifier, connected to output of primary converter first winding coiled at an open toroidal ferrite core, on the inputs of second rectifier with operation amplifier, to output of the second rectifier with operation amplifier an analogue-to-digital converter is connected, to whose output a microcontroller is connected, to whose output a radio transmitter is connected, to whose output SHF amplifier is connected, whose output is connected to the receiving-transmitting antenna. The control unit comprises a microcontroller comprising a radio-transmitter, at first input of which a control command is supplied, to the second input the SHF receiver is connected, which is connected to the receiving-transmitting antenna, to the output of said radio-transmitter the SHF amplifier is connected, whose output is connected to the receiving-transmitting antenna.