Open AccessMedium voltage vacuum circuit breaker with per phase electromagnetic actuator
Author(s) -
Mykola Leliuk,
Victoriia Lytvynenko
Publication year - 2021
Publication title -
vestnik nacionalʹnogo tehničeskogo universiteta "hpi". problemy soveršenstvovaniâ èlektričeskih mašin i apparatov
Language(s) - English
Resource type - Journals
eISSN - 2411-0604
pISSN - 2079-3944
DOI - 10.20998/2079-3944.2021.1.04
Subject(s) - multivibrator , electromagnet , circuit breaker , fuse (electrical) , electrical engineering , engineering , arc fault circuit interrupter , magnetic circuit , voltage , magnet , mechanical engineering , short circuit
In medium voltage vacuum circuit breakers, in order to achieve an even distribution of force along the entire length of the drive shaft, the drive mechanism is made per phase, that is, a separate electromagnet is installed under each pole. The analysis of designs and features of operation of vacuum circuit breakers with a per phase electromagnetic drive is carried out. Deficiencies in the designs of these drives have been identified. The design of a vacuum circuit breaker with a per phase electromagnetic drive and a kinematic diagram of the operation of a vacuum circuit breaker with a monostable polarized electromagnet and a return spring during the closing operation are considered. As a per phase drive, it is proposed to use three monostable polarized electromagnets with return springs, which makes it possible to reduce the overall dimensions of not only the drive electromagnet, but also the vacuum circuit breaker. Moreover, the return spring is not included in the design of the proposed electromagnet, but is part of the circuit breaker drive mechanism. The design of the housing of the vacuum circuit breaker with a per phase drive and a synchronizing shaft has been developed, which makes it impossible for the non-simultaneous closing and opening of the main contacts when performing switching operations. The calculation of a monostable polarized electromagnet is carried out and the possibility of its use as a per-phase drive in a medium voltage vacuum circuit breaker is confirmed.