時間：2011-06-14 21:26來源：藍天飛行翻譯 作者：航空 點擊：次
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APU驅(qū)動的發(fā)電機安裝在 APU附件齒輪箱前表面上。 APU發(fā)電機可產(chǎn)生飛機在地面操作時系統(tǒng)所需基本交流電，此發(fā)電機同時也可做為飛行中的備用電源。 APU被用來在地面提供 60千伏安的電源及飛行中提供 50千伏安的交流電源。 (2) The APU ac generator has 6 ac terminals: T1,T2,and T3 are the power terminals, T4,T5 and T6 are the neutral or ground terminals. T1 and T4 are for phase A, the leads are color-coded red. T2 and T5 are for phase C, the leads are color-coded blue. T3 and T6 are for phase B, the leads are color-coded yellow. These terminal numbering and color-coding is the same as for the engine –driven generators. Cooling air enters through a duct from outside the APU compartment, passes through the generator and discharges into the APU. The generator is attached to the APU accessory drive gearbox with 12 slotted holes over mounting studs. The neutral current transformer sense the total current flowing through the APU generator at the neutral terminal. APU發(fā)電機有六個交流接線端： T1，T2和 T3是電源接線端， T4，T5和 T6是中線或地面接線端。 T1和 T4為 A相，導線顏色為紅色。 T2和 T5為 C相，導線顏色為藍色。 T3和 T6為 B相，導線顏色為黃色。 這些接線端號碼及顏色代碼與發(fā)動機驅(qū)動的發(fā)電機是相同的。冷卻空 氣通過一個 APU外面的管道進來，通過發(fā)電機和排氣裝置進入 APU。 發(fā)電機被放在 APU附件驅(qū)動齒輪箱上，用 12個雙頭螺栓固定。中線 電流轉(zhuǎn)換感受流過 APU發(fā)電機中線接線端的總的電流。 (3) The ac power produced by APU generator is of constant frequency. To achieve this, the APU generator drive( including a gearbox) can be used for reducing the high speed of the APU engine to a lower speed. The APU engine drive the generator in lower speed to produce ac power at constant frequency. APU發(fā)電機產(chǎn)生的交流電源是恒頻的。為得到恒頻電源， APU驅(qū)動發(fā)電機可將 APU發(fā)動機高速度降成低速使用。 APU發(fā)動機以低速驅(qū)動發(fā)電機，從而產(chǎn)生恒頻的交流電。 (4) The two APU generator breakers( see figure 19-2) connect 115 volt ac, 400 hertz, 3-phase power to the distribution system from the APU generator. The APU generator breakers are located in the bottom of the P6 panel in the flight compartment. The breaker has a dc coil for closing and tripping. A permanent magnet assists closing and latches the breaker in the closed position. An internal spring assists opening and holds it in the open position. The breaker has 6 main 115 volt ac contacts and 20 auxiliary contacts. The auxiliary contacts are used to control the positions of APU generator breakers and external power contactors, and for indicating lights in the flights in the flight compartment. The closing and tripping signals for the breakers are from the P5-4 panel. The breaker conacts position is indicated by the blue APU GEN OFF BUS light on the P5-4 panel. Access to the breaker is gained by opening circuit breaker panerls p6-11 and P6-12 at the bottom of P6 panel. 兩中 APU發(fā)電機跳開關將 115伏， 400HZ的三相交流電連接到 APU發(fā)電機的分配系統(tǒng)。 APU發(fā)電機跳開關安裝在駕駛艙 P6面板的低部。跳開關有一個打開 /閉合用的直流線圈。一個永久磁鐵幫助跳開關閉合并鎖定在閉合位。一個內(nèi)部彈簧幫助跳開關打開并保持在松開位。這個跳開關有 6個主 115伏交流觸點和 20個輔助觸點。這些輔助觸點用來控制 APU發(fā)電機跳開關位置及外部電源接觸器，及駕駛艙內(nèi)的燈光指示。跳開關的閉合或松開信號指示來自 P5-4面板。跳開關觸點位置由 P5-4面板上的藍色 “APU GEN OFF BUS”燈指示。跳開關可通過打開 P6面板低部的 P6-11及 P6-12電路跳開關后接近。 |
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