The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
H Rebstock - One of the best experts on this subject based on the ideXlab platform.
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Application of medium voltage vacuum circuit breakers to ensure power supply system reliability of intercity network
Power System Technology, 2006Co-Authors: Yong Wang, Yue Wang, H RebstockAbstract:The development of vacuum circuit breaker (VCB) technology depends on the improvements of two main technologies, i.e., the technology of vacuum interrupter and that of actuator mechanism. Along with the progress of the two technologies, the medium voltage VCBs with monostable magnetic actuators are implemented, in which the actuator mechanism and vacuum interrupter are integrated together in one body. This kind of medium voltage VCB are air-insulated and totally enclosed and possess the features of compaction, reliability, long life and real maintenance-free, and there is not any baleful gas inside the VCB. Because the air insulated fixed type switchgear panel is applied to the VCB, so its size is small and no maintenance is required. Here, the authors present and analyze this Research Achievement originate from obtained in Research and Development Laboratory in Sevastopol, former USSR, and appraise the application prospects of this technology.
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Most relevant results from Research and development in the field of medium voltage vacuum circuit breakers - a review
2006 China International Conference on Electricity Distribution (CICED 2006), 2006Co-Authors: A. Chaly, H Rebstock, V. Poluyanov, V. ZakharovAbstract:The development of vacuum circuit breaker (VCB) technology depends on the improvements of two main related technologies, the technology of vacuum interrupter and that of actuator mechanism. This paper summarized the Research Achievement originate from obtained in Research and Development Laboratory in Sevastopol, former USSR, that is called Monostable Magnetic Actuator, and is thought as the greatest breakthrough in this field since the appearance of medium voltage vacuum breaker. Meanwhile, the authors discussed the technology of a new microminiature vacuum interrupter design matches the lifetime and reliability of the actuator system by using advanced contact and bellow system, and an optimized design for combine both parts to an advanced breaker. According to the problems that appeared in the manufacture and application of magnetic breakers in China, the authors presented and analyzed the differences among existing kinds of vacuum breaker with magnetic actuator in different structures and principles. The actuator is called as the nerve center of the VCB. Magnetic actuator can effect all functions of traditional breaker actuator without any mechanical doff and lock devices for position fixed, reduce the necessary number of mechanical parts in a VCB in a big amount, therefore eliminate a many sources of reliability problem, and offer technical conditions for intelligent breakers. Monostable Magnetic Actuator is fixed in closed position by magnetic flux only, in the open position it is fixed with the aid of an opening spring. Monostable Magnetic Actuator overcame almost disadvantages of breakers with spring actuator and breakers with bi-stability magnetic actuator, and synthetically represented harmoniously matching parts not only from spring actuators, but also from magnetic actuators, it's behavior represented outstanding characteristic of a breaker both in electrical and mechanical. Vacuum interrupter (VI) is the heart of the VCB, breakage of the bellow is the main reason for it failure due to loss of vacuum today. For VI, two key areas of improvements are identified -in contacts and vacuum sealing. The use of Axial Magnetic Field (AMF), together with advanced contact material, can increase interrupting performance and contact life of Vis significantly. Vacuum sealing, traditionally done through pressed metal bellows, can be improved by using welding in the manufacturing process. The result is reduced stress on the metal bellow structure, thus increasing the rated number of operations considerably. ISM, medium voltage vacuum breaker with Monostable Magnetic Actuator and this microminiature VI is the only kind of breaker in the world with the actuator designed in linear moving structure. It can reduce driving power to the least, totally eliminate bounce in closing operation; it can reduce mechanical parts number to the least, eliminate the almost all sources of reliability problem, possess the features of compaction, reliability, long life and real maintenance-free. (16 pages)
Yong Wang - One of the best experts on this subject based on the ideXlab platform.
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Application of medium voltage vacuum circuit breakers to ensure power supply system reliability of intercity network
Power System Technology, 2006Co-Authors: Yong Wang, Yue Wang, H RebstockAbstract:The development of vacuum circuit breaker (VCB) technology depends on the improvements of two main technologies, i.e., the technology of vacuum interrupter and that of actuator mechanism. Along with the progress of the two technologies, the medium voltage VCBs with monostable magnetic actuators are implemented, in which the actuator mechanism and vacuum interrupter are integrated together in one body. This kind of medium voltage VCB are air-insulated and totally enclosed and possess the features of compaction, reliability, long life and real maintenance-free, and there is not any baleful gas inside the VCB. Because the air insulated fixed type switchgear panel is applied to the VCB, so its size is small and no maintenance is required. Here, the authors present and analyze this Research Achievement originate from obtained in Research and Development Laboratory in Sevastopol, former USSR, and appraise the application prospects of this technology.
Yue Wang - One of the best experts on this subject based on the ideXlab platform.
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Application of medium voltage vacuum circuit breakers to ensure power supply system reliability of intercity network
Power System Technology, 2006Co-Authors: Yong Wang, Yue Wang, H RebstockAbstract:The development of vacuum circuit breaker (VCB) technology depends on the improvements of two main technologies, i.e., the technology of vacuum interrupter and that of actuator mechanism. Along with the progress of the two technologies, the medium voltage VCBs with monostable magnetic actuators are implemented, in which the actuator mechanism and vacuum interrupter are integrated together in one body. This kind of medium voltage VCB are air-insulated and totally enclosed and possess the features of compaction, reliability, long life and real maintenance-free, and there is not any baleful gas inside the VCB. Because the air insulated fixed type switchgear panel is applied to the VCB, so its size is small and no maintenance is required. Here, the authors present and analyze this Research Achievement originate from obtained in Research and Development Laboratory in Sevastopol, former USSR, and appraise the application prospects of this technology.
Wu Shaomin - One of the best experts on this subject based on the ideXlab platform.
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Investigation on the Evaluation System of University Teachers' Scientific Research Achievement
The Guide of Science & Education, 2011Co-Authors: Wu ShaominAbstract:Based on the factors which may influence teachers' scientific Research Achievements in higher education,the author definitely presents some basic principles on the design of evaluation norm and then puts forward the evaluation system of university teachers' scientific Research Achievements.
V. Zakharov - One of the best experts on this subject based on the ideXlab platform.
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Most relevant results from Research and development in the field of medium voltage vacuum circuit breakers - a review
2006 China International Conference on Electricity Distribution (CICED 2006), 2006Co-Authors: A. Chaly, H Rebstock, V. Poluyanov, V. ZakharovAbstract:The development of vacuum circuit breaker (VCB) technology depends on the improvements of two main related technologies, the technology of vacuum interrupter and that of actuator mechanism. This paper summarized the Research Achievement originate from obtained in Research and Development Laboratory in Sevastopol, former USSR, that is called Monostable Magnetic Actuator, and is thought as the greatest breakthrough in this field since the appearance of medium voltage vacuum breaker. Meanwhile, the authors discussed the technology of a new microminiature vacuum interrupter design matches the lifetime and reliability of the actuator system by using advanced contact and bellow system, and an optimized design for combine both parts to an advanced breaker. According to the problems that appeared in the manufacture and application of magnetic breakers in China, the authors presented and analyzed the differences among existing kinds of vacuum breaker with magnetic actuator in different structures and principles. The actuator is called as the nerve center of the VCB. Magnetic actuator can effect all functions of traditional breaker actuator without any mechanical doff and lock devices for position fixed, reduce the necessary number of mechanical parts in a VCB in a big amount, therefore eliminate a many sources of reliability problem, and offer technical conditions for intelligent breakers. Monostable Magnetic Actuator is fixed in closed position by magnetic flux only, in the open position it is fixed with the aid of an opening spring. Monostable Magnetic Actuator overcame almost disadvantages of breakers with spring actuator and breakers with bi-stability magnetic actuator, and synthetically represented harmoniously matching parts not only from spring actuators, but also from magnetic actuators, it's behavior represented outstanding characteristic of a breaker both in electrical and mechanical. Vacuum interrupter (VI) is the heart of the VCB, breakage of the bellow is the main reason for it failure due to loss of vacuum today. For VI, two key areas of improvements are identified -in contacts and vacuum sealing. The use of Axial Magnetic Field (AMF), together with advanced contact material, can increase interrupting performance and contact life of Vis significantly. Vacuum sealing, traditionally done through pressed metal bellows, can be improved by using welding in the manufacturing process. The result is reduced stress on the metal bellow structure, thus increasing the rated number of operations considerably. ISM, medium voltage vacuum breaker with Monostable Magnetic Actuator and this microminiature VI is the only kind of breaker in the world with the actuator designed in linear moving structure. It can reduce driving power to the least, totally eliminate bounce in closing operation; it can reduce mechanical parts number to the least, eliminate the almost all sources of reliability problem, possess the features of compaction, reliability, long life and real maintenance-free. (16 pages)
