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By a mechanical control of the Switchgear
Author：admin Make time：2008-12-8 16:44:56 Read：Meeting
| Abstract: In the cabinet fixed analyzes the practical application of the advantages and disadvantages, a simple and reliable operation of the principle of mechanical procedures, design and optimization of production are applied in practice. Key words: Switchgear; control procedures; three-position switch; agencies operating round slot 1 Overview Armored fixed closed switchgear (referred to as fixed-counter), in power system has been widely used. Its greatest strength lies in its isolation may have a fracture and the ground surface, an increase of operation and maintenance of security. However, the isolation switch and the grounding of one-on-one switch from manual operation to control the body, the manual operation of the large number of agencies. In order to ensure the safety of the operation, isolation switches, circuit breakers and switches must be grounded in accordance with strict operating procedures, so in the manual as well as between them and between the circuit breakers have a complex set of mechanical interlocking device. The cabinet fixed the typical program (state power) as shown in Figure 1: There are two isolation switch, grounding two and a circuit breaker switch (bring their own institutions to operate), the need for manual operation of the four institutions. Switchgear of the power transmission operation in the following order: (1) close doors; (2) separate switches on the ground; (3) under the separate grounding switch; (4) closed on the isolation switch; (5) combined upper and lower isolation switch; (6) closed circuit breaker to complete the transmission. If you need to complete the whole process of power, according to the contrary in the order to carry out the operation. It is clear that institutions operate more operations handle more; interlock devices more complex, more cumbersome process. Dangers of unsafe sex, the more natural. 2 design In order to overcome the cabinet fixed the shortcomings of the above, to further improve the reliability of power supply, we feel it is necessary to counter a fixed innovation, the introduction of a new design philosophy: 2.1 to minimize the number of switches. Due to the isolation switch is not possible to switch ground and closing at the same time, so there may be a three-position switch instead of an isolation switch and a grounding switch. 2.2 interlocking institutions as simple as possible. Due to intermittent movement's institutions in accordance with the specific demands of the cyclical movement and a halt. So not only easy to achieve the three-position switch, or the isolation of the ground operation, but also can be easily carried out in accordance with the procedure more than three-position switch of the various operations, do not need any additional interlocking institutions. Circuit Breaker and the operation of the door with three-position switch between the operation of a certain relationship between the order. Therefore, only a simple interlock device will be able to achieve, we do not need to lock the additional procedures. Go to: high voltage switching network For more information visit 2.3 by a single operator handle a number of operations to replace the handle. As the three-position switch operation is intermittent body movement, as long as may be reasonably designed to operate with a handle to control more than three-position switch, not only simplified the operation and make it possible for electrical operation. 3 for the implementation and application 3.1 Based on the above ideas, Guangdong Shun-opened R & D Electric Group has developed a new type of fixed-line KGN cabinets, counters fixed by the side of the line into the three-position switch, vacuum circuit breakers (bring their own institutions to operate), the integrated operation of the institutions, round Side of the three-position switch (on the earth switches with short-circuit ground clearance ability; Note: The ongoing patent application), and other components. 3.2 operating system from the left and right side of the operation of the two institutions, some of the bevel gear drive, handle the operation, the electric motor and clutch, the location of the signs, vacuum circuit breakers, as well as the door of interlocking institutions (not shown in the diagram) and so on, of which On the right side of the operation side of the line of control into the three-position switch on the left side of the round operation control of the three-position switch, manual and electric clutch for the conversion. By the agency with the radial slot and a slot round off a round of the crank, as well as the composition of the rack. Concave round slot on the arc on the block and crank Waitu arc, to ensure the round of the trough in the rest phase of positioning and reliable. As the cabinet fixed by the OEM assembled from thin steel plate, less rigid, severe deformation of operation, the trough in the round of the campaign and the rest transform two states, will result in an anomalous situation; round of the trough in the trough of the radial Inter-linked with chutes arc (radius of the arc with the same radius of the crank), the crank on the yen was sold entirely in the tank movement restrictions. Some radial trough may be connected with two circular tank, in order to ensure a round pin movement in the right direction, we set up a round of the groove-driven cam, crank set up a sales-oriented, making movement by the expected path of the road . 3.4 three-stage operation to achieve the body moves, as shown in Figure 5: If the crank clockwise rotation, the crank will be sold yen on the groove into the round of the radial bed, 180-degree rotating crank, to complete the first round of the tank movement. If the counter-clockwise rotating crank, crank on the yen will be sold into the groove of the circular tank round, crank-rotate 180 degrees round of the slot to rest, if the two groups of round slot radial arc with the paragraph above staggered design. When a group of institutional sales of yen into the radial slot, making another round of institutional sales group on the arc into the slot, will be able to achieve step-operation. 4 Conclusion Use the handle to operate only through the integrated operation of the institutions into round three-position switch to implement the procedures of operation, to achieve the "five anti-chain" functions, simple operation, switching position clearer instructions, the OEM small And can be manual or electric operation. The product has been in the national high-voltage electrical appliances for Quality Supervision and Inspection Center, through all types of tests and adopted at the provincial level appraisal; from the market, users of the products were well received, the obvious economic benefits. References: 〔〕 1-Huang, mechanical principles. Beijing: Higher Education Press, 1958. 2 〔〕 SD318-89. Atresia high voltage switchboard installation technology. 3 〔〕 GB3906-200X.3.6 ~ 40.5kV Switchgear communication and control equipment |