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Conducting high-voltage switchgear circuit design and analysis


. Reliability of the connection and continuity from consideration, to consider the connection of steel bus. (2) G2 is a station switchgear cabinet with a change, a2b ... Cd were the main loop section. Limiting fuse as the existence of long-term carriers to meet the requirements of the premise,[link widoczny dla zalogowanych], a2b segment czd, segment bus structure can be different to suit different dynamic thermal requirements. Change the station with a smaller capacity, long-term security or transport current in the range from tens of security, should focus on the main circuit to consider the ability to meet the dynamic thermal stability. If the transport current for a few long-term security, consider using steel bus. (3) G3 is a feeder switchgear cabinet, a3be typical section of the main circuit, in accordance with the requirements of the main circuit design considerations, choose the appropriate bus, and specifications. b3c segment connected to arrester, is the signal circuit, in accordance with the signal circuit design considerations, recommended steel bus. b3d section of the ground switch circuit, the carrier does not consider the long-term requirements, / - 60 Optimum Design OptimizationDesign ~ rubidium ? 00e ≤ 0c00C0i'G6G5G4G3G2Gl mother of the mother of the switch cabinet cabinet cabinet PT transformer station into the line with varying cabinet cabinet a5a4aa2alooob2oooooo Chang, 8 . b4C2d2f =. . 4oood4e4ooooooooob. . b. c5 ・ b5 \ - / / l1. C d3e6d5V photos one by one but a typical power distribution systems have the system requirements for dynamic thermal stability of the rated capacity, and can not be deformed and damaged. Can refer to the relevant standard use copper bus bar or the actual situation, in accordance with the selection of the appropriate formula for the bus the other materials. (4) G4 for the voltage transformer switchgear cabinet, in accordance with the relevant standards, the following are the signals from the a4 loop point, can not consider the dynamic thermal and other factors. However, during use, for various reasons, often short-circuit voltage transformer burned phenomenon, in order to effectively protect the voltage transformer, power distribution system using high-voltage current-limiting fuse 0.5A. In this sense, consideration, a4bcd segment loop dynamic thermal stability requirements to be considered as limiting fuses operating time within half a cycle, a4b4cd segment loop dynamic stability should be sufficient capacity,[link widoczny dla zalogowanych], you can consider using steel bus, to ensure sufficient rigidity . a4f4 segment connected to arrester, is the signal circuit,[link widoczny dla zalogowanych], in accordance with the signal circuit design considerations, recommended steel bus. de4 segment is harmonic elimination device connection, are the signal circuit, can follow the signal circuit design considerations. As the center of potential drift, there will be several hundred milliamps of current production, as easy to heat, they also do not regard the cable cross-section is too small, resulting in cable burns out,[link widoczny dla zalogowanych], the open neutral, harmonic elimination device connection cable should have a certain strength and cross section. (5) G5 as the mother of the switchgear cabinet, ad section of the main loop, in accordance with the requirements of the main circuit design considerations, choose the appropriate bus, and specifications. bsc segment connected to arrester, is the signal circuit, in accordance with the signal circuit design considerations, recommended steel bus. (6) G6 switchgear cabinet for contacts, e section of the main circuit in accordance with the requirements of the main circuit design considerations, choose the appropriate bus,[link widoczny dla zalogowanych], and specifications. 4 Conclusion conductive loop is properly designed so that the main wiring and electrical distribution equipment to meet safety, one of the important economic operation. Although the use of equipment location, working conditions are different, but the design analysis is based on the main principles of the relevant national standards. Therefore, according to relevant national standards: (1) Connect the lead carrying electrical circuit components, it is necessary to meet the requirements of long-term carriers, but also the dynamic thermal stability with enough capacity. (2) ground loop, only to meet 87% of the rated capacity of dynamic and thermal stability; but for the earth switch (or ground trolley), to have the system requirements for dynamic thermal stability of the rated capacity, and can not be deformed and damaged. (3) to connect the signal components of the circuit, to ensure the continuity of the signal transmission, reliability can be, does not need to consider long-term carriers, but do not consider the dynamic thermal stability. EM Electrical Manufacturers)) magazine subscriptions in 2007, \standards / certification. 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