title: ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ½Ð¸Ð¶ÐµÐ½Ð¸Ñ ÑÑÐ²ÑÑÐ²Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð·Ð°ÑÐ¸ÑÐ½ÑÑ Ð°Ð¿Ð¿Ð°ÑÐ°ÑÐ¾Ð² Ð² ÑÐµÑÐ¸ 0,4 ÐºÐ Ð¿ÑÐ¸ Ð²Ð¾Ð·Ð½Ð¸ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¸ ÑÑÐ½ÑÐ¸ÑÑÑÑÐµÐ³Ð¾ ÑÑÑÐµÐºÑÐ° Ð½Ð°Ð³ÑÑÐ·ÐºÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Analysis of the decrease in the sensitivity of protective devices in the 0.4 kV network in the event of a shunt load effect
Creators: name: Ð§ÐµÐ±ÑÐºÐ¸Ð½, ÐÐµÐ½Ð¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: Ð­Ð»ÐµÐºÑÑÐ¾Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ð¸
ÐÑÐºÐ»ÑÑÐ°ÑÐµÐ»Ð¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¸Ðµ
Ð­Ð»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¸ÑÑÐµÐ¼Ñ
ÑÐ¸ÑÑÐµÐ¼Ð° ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½Ð°Ð±Ð¶ÐµÐ½Ð¸Ñ
ÑÐ½Ð¸Ð¶ÐµÐ½Ð¸Ðµ ÑÑÐ²ÑÑÐ²Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸
power supply system
desensitization

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description: Topic of the final qualification work: "Analysis of the decrease in the sensitivity of protective devices in the 0.4 kV network in the event of a shunt load effect". This work is devoted to the study of the shunting effect of asynchronous electric motors with a voltage of 0.4 kV. At the first stage, the studied power supply scheme of 0.4 kV was chosen. After that, the selection and calculation of the parameters of the main equipment was made: power transformer, cable lines, circuit breakers, busbars and asynchronous power selection motors. At the second stage of the work, variant calculations of a three-phase metal and a single-phase arc cycle were made for two variations of the circuit diagram: with and without electric motor load. Based on the results of the calculations, an analysis of the results was carried out, which proved an unreasonable increase in short-circuit currents, if the shunt effect of the load was not taken into account in the calculations. At the first, final stage, the sensitivity coefficients were calculated for two variations of the circuit, the results of detecting a decrease in the sensitivity of the device sensitivity when a shunting effect of the load occurred.