title: ÐÑÑÐ¾ÐºÐ¾Ð²Ð¾Ð»ÑÑÐ½ÑÐ¹ Ð²Ð°ÐºÑÑÐ¼Ð½ÑÐ¹ Ð²ÑÐºÐ»ÑÑÐ°ÑÐµÐ»Ñ Ð² Ð¿Ð¸ÑÐ°ÑÑÐ¸Ñ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»Ð¸ÑÐµÐ»ÑÐ½ÑÑ ÑÐµÑÑÑ 110 ÐºÐ Ð¸ Ð²ÑÑÐµ
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: High voltage vacuum circuit breaker in supply distribution networks of 110 kV and above
Creators: name: ÐÐµÐ´ÐµÐ½ÑÐºÐ¸Ð¹, ÐÐ¼Ð¸ÑÑÐ¸Ð¹
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: 2020
Subjects: Ð²Ð°ÐºÑÑÐ¼Ð½ÑÐ¹ Ð²ÑÐºÐ»ÑÑÐ°ÑÐµÐ»Ñ
Ð²Ð°ÐºÑÑÐ¼Ð½Ð°Ñ Ð´ÑÐ³Ð¾Ð³Ð°ÑÐ¸ÑÐµÐ»ÑÐ½Ð°Ñ ÐºÐ°Ð¼ÐµÑÐ°
Ð°ÐºÑÐ¸Ð°Ð»ÑÐ½Ð¾Ðµ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ðµ Ð¿Ð¾Ð»Ðµ
Ð´ÑÐ³Ð¾Ð³Ð°ÑÐ¸ÑÐµÐ»ÑÐ½ÑÐµ ÐºÐ¾Ð½ÑÐ°ÐºÑÑ
vacuum circuit breaker
vacuum arc temperature camera
axial magnetic field
arc contacts

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description: This final work outlines an approach to designing a contact system for a vacuum arcing chamber based on the stage of modeling geometry and multiphysical processes occurring inside the switching chamber of a high-voltage vacuum circuit breaker. For the scientific substantiation of approaches to modeling, the work begins with a review and analysis of the literature on the topic. Constructive arguments are given regarding the choice of VAC as an object of study and its nominal values of currents and voltages. Explanations are given to the principles of arc burning in metal vapors in a vacuum, the features of arc suppression at a rated breaking current of 31,5 kA. The effect of axial and radial magnetic fields on the electric arc and the surfaces of the arcing contacts is studied, after which a reasonable choice is made for the AMF-system for this case. The dimensions of the geometric parts of the contact system for the given parameters are calculated. To improve the efficiency of the device, some improvements in the geometry of the model are proposed, affecting the reduction of contact wear, the operation of the drive of the movable contact and the increase of the breaking capacity of the circuit breaker. The model of an arc extinguishing system in CAD AutoCAD. The initial parameters for the obtained geometry were selected and set, such as normalized parameters, physical materials of the contact system, and boundary conditions for modeling electrical, magnetic, and thermal processes in the COMSOL Multiphysics program. The graphs of the distribution of electric currents, magnetic fields and thermal distribution in the contact system are presented. The rated parameters of the transient recovery voltage are calculated for various modes of interaction of the vacuum circuit breaker with the power system.