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Patent
BEIJING PEOPLES Electrical PLANT CO. | Date: 2015-03-20

A fuse protector with a plurality of fuses comprises a fuse protector base, a fuse carrier), and fuse elements. The fuse elements are disposed on the fuse carrier, and the fuse carrier is inserted in the fuse protector base. One side of the fuse protector base is provided with at least two wiring assemblies, and the other side of the fuse protector base is provided with at least two wiring assemblies. The fuse protector base is further provided with base contacts corresponding to the wiring assemblies. The fuse carrier is inserted into the fuse protector base. When the fuse carrier is pulled out of the fuse protector base, at least four breaking points are formed at the same time, and the voltage of an arc is distributed to the four contact points. Therefore, the voltage of the arc is effectively reduced, space is saved.


Patent
BEIJING PEOPLES Electrical PLANT CO. | Date: 2015-03-20

A breaker comprises a static contact, a moving contact, and an arc-extinguishing chamber. A contact surface of an electrical contact of the static contact and an electrical contact of the moving contact and a bottom plane of a base form an acute angle that is located in the first quadrant. The moving contact comprises a conducting rod having a projecting portion, and the electrical contact which is welded on an end surface of the projecting portion in a direction facing the electrical contact of the static contact. A bottom arc-ignition grid plate on the bottom of the arc-extinguishing chamber is arranged lower than the electrical contact of the static contact. A top arc-ignition grid plate on the top of the arc-extinguishing chamber is arranged higher than the maximum position of the electrical contact of the moving contact when the moving contact is opened.


Nan Y.,Beijing Peoples Electrical Plant Co. | Wang X.-N.,Beijing Peoples Electrical Plant Co. | Fan S.-G.,Baoji Power Supply Company | Zhao Z.-Q.,Beijing Peoples Electrical Plant Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2014

Through the mechanism analysis of protective relay misoperation because of one point earthing in power DC system, this paper proposes safety assessment measures based on system capacitance analysis. Combined with conditions of protective relay misoperation caused by one point earthing and State Grid eighteen anti accident measures, it proposes safety design measures that control negative voltage to earth in DC insulation monitoring system, mainly includes the single arm detection bridge and temporary fixed bridge, and describes the specific implementation plan and corresponding algorithm. According to these measures, a higher safety DC insulation monitoring system is designed which can prevent protective relay misoperation because of one point earthing.


Zhang M.-D.,CAS Institute of Process Engineering | Zhang M.-D.,University of Chinese Academy of Sciences | Wang Z.,CAS Institute of Process Engineering | Zhang X.-W.,China National Electrical Equipment Corporation | And 3 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2010

The pyrolysis of Gaocheng and Fugu coals in the temperature range from 460 to 520°C, heated by solid heat carrier of quartz sand, was investigated in a continuous pyrolytic apparatus. The yields, composition and characteristics of gas and liquid products were analyzed. The results show that within the temperature range, the yields of gas and liquid increase with increasing pyrolytic temperature, and the maximum liquid yield is about 12%. The gas composition obviously varies with pyrolytic temperature, and the heating value of coal gas is above 25 MJ/m3. The tar is in abundance of phenol derivatives, polycyclic aromatic hydrocarbons, benzene derivatives, and chain hydrocarbons are also found at higher content. The content of benzene derivatives increases with increasing temperature, but the content of phenols decreases with it. Based on the results, a simplified reaction route from phenol derivatives to aromatics has been proposed.


Trademark
BEIJING PEOPLES Electrical PLANT CO. | Date: 2012-05-15

Circuit breakers; electrical connections, namely, sockets, plugs and contacts; relays, electric; electric fuses; electrical controllers in the nature of push buttons; switches, electric; electricity transformers; electricity inducers.

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