نتایج جستجو برای: vortex breaker
تعداد نتایج: 28702 فیلتر نتایج به سال:
Abstract Through a macroscopic inspection, stereomicroscopic material analysis, hardness metallographic scanning electron microscope and energy spectrum the reasons for breakage of connecting bolts circuit breaker in 500kV converter station are studied. The results show that bolt fracture is caused by combined effect hydrogen embrittlement high-stress low-cycle fatigue. corresponding recommende...
This paper will discuss the importance of reliable and repeatable performance of molded case circuit breakers in today’s power distribution systems. The paper will review existing standards for maintenance of molded case breakers including procedures outlined in NEMA AB4 and IEEE1458. Common misconceptions and system application issues regarding these devices will be discussed. Several examples...
The assurance of the reliability for the transformation substations is one of primary goals of the manufacturers and distributors of electricity. Therefore, a proper monitoring and maintenance program is required. The circuit breaker is a complex device, subject to the thermal and mechanical stresses during the normal or fault currents switching. The substations are frequently equipped with SF6...
A large amount of gamma-aminobutyric acid (GABA) was found to accumulate in tomato (Solanum lycopersicum) fruits before the breaker stage. Shortly thereafter, GABA was rapidly catabolized after the breaker stage. We screened the GABA-rich tomato cultivar 'DG03-9' which did not show rapid GABA catabolism after the breaker stage. Although GABA hyperaccumulation and rapid catabolism in fruits is w...
Morning glory spillway is one of the spillways and used when it is not possible to use any other spillways. With the onset of submergence and flow loss, and intensification of circulation and vortexes, spillway performance decreases severely. With decreasing discharge coefficient, the height of water in the reservoir increases and the risk of dam damage, caused by the lack of spillway ability o...
Many stock exchanges set up certain limits on the maximum variation that a stock is allowed to have in a single day. Table 1 gives an overview of the price limit rules of some of the world exchanges. As reflected in the table, among stock exchanges in 41 countries that we obtain information, 23 of them have price limits and 7 of them have some kinds of circuit breaker rules. The normal assertio...
Low-cost step-up/step-down converter accepts 2V to 16V inputs 10 Visible-laser driver has digitally controlled power and modulation 11 High-voltage circuit breaker protects to 26V 13 Dual comparator forms temperature-compensated proximity detector 15
Low-cost step-up/step-down converter accepts 2V to 16V inputs 10 Visible-laser driver has digitally controlled power and modulation 11 High-voltage circuit breaker protects to 26V 13 Dual comparator forms temperature-compensated proximity detector 15
We prove that in the biased (1 : b) Hamiltonicity Maker-Breaker game, played on the edges of the complete graph Kn, Maker has a winning strategy for b(n) ≤ ( 1− 30 ln n ) n lnn , for all large enough n.
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید