title: ÐÐ¾Ð´ÐµÑÐ½Ð¸Ð·Ð°ÑÐ¸Ñ Ð±ÑÑÑÑÐ¾Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐµÐ³Ð¾ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð²ÑÐºÐ»ÑÑÐ°ÑÐµÐ»Ñ Ð¿Ð¾ÑÑÐ¾ÑÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÐºÐ° 20 ÐºÐ, 4 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: Modernization of high-speed DC circuit breaker 20 kA, 4 kV
Creators: name: Ð¡Ð¾Ð»Ð¾Ð²ÑÐµÐ², ÐÐ¸ÑÐ°Ð¸Ð»
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: 2024
Subjects: ÐÑÐºÐ»ÑÑÐ°ÑÐµÐ»Ð¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¸Ðµ
Ð°Ð²ÑÐ¾Ð¼Ð°Ñ Ð¿Ð¾ÑÑÐ¾ÑÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÐºÐ°
Ð´ÑÐ³Ð¾Ð³Ð°ÑÐ¸ÑÐµÐ»ÑÐ½Ð¾Ðµ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð¾
Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ðµ ÑÐ¾ÐºÐ° Ð¾ÑÐºÐ»ÑÑÐµÐ½Ð¸Ñ
Ð¿Ð½ÐµÐ²Ð¼Ð°ÑÐ¸ÐºÐ° ÑÐ»ÐµÐºÑÑÐ¾Ð²Ð¾Ð·Ð¾Ð²
dc switch
arc-externing device
increasing breaking current
pneumatics of electric locomotives

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description: Tasks solved during the work: Direct current circuit breakers (direct current switching equipment) for electric locomotives of Russian and European companies are analyzed. An analysis of the operating requirements for DC circuit breakers to protect electrical equipment of electric locomotive was carried out. An analysis was carried out of the operation of the arc extinguishing device when switching off the short circuit current (rated breaking current), the influence of the parameters of the arc extinguishing device on the breaking capacity of the DC circuit breaker and overvoltage during disconnection. The influence of the characteristics of the pneumatic system of a DC circuit breaker on the operation of the pneumatic drive during switching off is considered, as well as the use of compressed air from a DC circuit breaker to organize gas blast in the arc extinguishing device in order to increase the breaking capacity of the arc extinguishing device. An analysis of the results of numerical modeling of processes in the arc extinguishing device of a DC circuit breaker during extinguishing a direct current arc (self-generation effect, generation effect of the arc extinguishing chamber wall, raise in air pressure during the shutdown process) was carried out. An analysis of the results of numerical modeling of processes in the arc extinguishing device of a DC automatic machine with compressed air injection when the DC current is turned off was carried out.