mac cosmetics wholesale Wan'anxi Hydropower calcul

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Wan'anxi Hydropower calculated excitation transformer selection


3; according to research funded defense, strong excitation control angle selection in 5 ~ 3O. Conducive to full-controlled bridge between the work to improve the abnormal operating state, according to a 25. Calculation, too Ut a 294V, while the manufacturers Ut a 396V, much larger than the results, which led to the improper number of parameters. Inappropriate choice of control angle powerful 1.2 Mai control angle from equation (1) calculation, when the U-a 396V when a 46.9. , Far beyond the recommended 5 domestic information. ~ 3O. . Rated load control angle: r01 to = COS-1uc) + J 1lu () + No. ... ink ten z △ = 81.8. [---- Lei - I. The result is a rated operating conditions, the average voltage waveform there are more negative part of that change each time flow, the energy released by the rotor winding to maintain excitation current. In addition, the three-phase full bridge power factor angle control for controlling the angle, therefore,tory burch outlet, control the angle increases, the effect is equivalent to the load power factor decreases, increased the excitation becomes reactive loss. O1.3 AC side line current does not meet the requirements of the rated field excitation provided by the manufacturer to change the exchange rated line current I-460A, and the angle of the load control system for the calculation of excitation press rated line current calculated: L = 1.15 / _ two -= IM) (n / 3 ≤ d ≤) (2) When a-69.8., the calculation of I. a 496A. Thus, in nominal operating conditions, excitation become Vice-side excitation can not meet the required rated current, over-current change caused by excitation to run, causing the temperature rise. was forced to stop, we examine the excitation temperature of 70 ℃ variable case above, the deterioration of working conditions of excitation becomes 1. 4 poor quality of equipment provided by manufacturers of excitation becomes small factory town of production lines, are very insulated and barely safe distance, process rough, poor moisture resistance, core layers are not tight, the appearance of severe corrosion, resulting in local short-circuit, eddy current increases, cause core heating, increasing the temperature of the transformer coil,mbt shoes ireland, despite treatment, is still less than the requirements of long-running 2 parameters calculated for the above, the re-ordered when the excitation changes,p90x workout schedule, we change the parameters of excitation re-selection. 2.1 AC side of the rated line voltage chosen on the basis (1) Ku + blue KIj, ~ X + = △ [Factory =-- 1 - when taking 0.06, ‰ Take 2, K 2 obtained, U1 -294V, shared with the factory tune, to facilitate manufacturing, U a 300V,mac cosmetics wholesale, and thus calculate the strong excitation, rated, no-load control angle and the capacity of the transformer rated current and 2.2 angle of the control condition check under the U-300V, the condition of the control angle adjusted as follows: strong excitation conditions, n = 25.3.} rated conditions, n a 59.9.} no-load conditions, n = 73 .1.. is clearly better than the original equipment has greatly improved. 2.3 according to the formula approved transformer capacity: · S a √ 3UI × 10 (kVA) (3) calculated S-289kVA, consider a certain margin, the consultation with the manufacturers to take 315kVA. 2.4 Rated AC side of the AC side line current selection of rated line current is calculated as I-1.15 / Temple J ∽ (0 ≤ ≤ {) (4) dJ rated conditions as a = 59.9.. Therefore, I a 516A. calculated according to the rated capacity of transformer Fufang rated line current L = 606A, fully meet the requirements of the rated operating conditions, with a large margin. 2.5 transformer efficiency, manufacturers arrival equipment, / a 0.56, but the actual load and the ratio of the rated capacity of 82.7 (because of its low power factor), and less efficient transformers, -90.9 the new sorting equipment to improve the load power factor, the w / w: = 0.51, good camera work efficiency in the area: = 98.3, according to the above calculation, we determine the parameters of the new electoral transformer Table 3 Table 3 exciting new option variable parameter table model sc · 315/10 0.5 Capacity (kVA) 3l5 efficiency 3-phase frequency (Hz) 50 to allow use indoor temperature (℃) 100 connecting group Y, dl1 impedance voltage 5.99 load loss (w) l072 short-circuit loss (w) 35l3 high side voltage (v) l0500 high side current (A) l7.3 low side voltage (v) 300 Low Side Current (A) 6063 Conclusion The new transformer from selected and put into operation in October 1994 has been running more than six months after the test, regardless of the load, no load, strong excitation conditions, etc., can meet the requirements of the unit for field installation, stable operation, efficiency, proved to be successful re-election. (Received date; 1995-07 an Oz)
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