时间：2011-06-14 21:26来源：蓝天飞行翻译 作者：航空 点击：次
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APU驱动的发电机安装在 APU附件齿轮箱前表面上。 APU发电机可产生飞机在地面操作时系统所需基本交流电，此发电机同时也可做为飞行中的备用电源。 APU被用来在地面提供 60千伏安的电源及飞行中提供 50千伏安的交流电源。 (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发电机有六个交流接线端： T1，T2和 T3是电源接线端， T4，T5和 T6是中线或地面接线端。 T1和 T4为 A相，导线颜色为红色。 T2和 T5为 C相，导线颜色为蓝色。 T3和 T6为 B相，导线颜色为黄色。 这些接线端号码及颜色代码与发动机驱动的发电机是相同的。冷却空 气通过一个 APU外面的管道进来，通过发电机和排气装置进入 APU。 发电机被放在 APU附件驱动齿轮箱上，用 12个双头螺栓固定。中线 电流转换感受流过 APU发电机中线接线端的总的电流。 (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发电机产生的交流电源是恒频的。为得到恒频电源， APU驱动发电机可将 APU发动机高速度降成低速使用。 APU发动机以低速驱动发电机，从而产生恒频的交流电。 (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. 两中 APU发电机跳开关将 115伏， 400HZ的三相交流电连接到 APU发电机的分配系统。 APU发电机跳开关安装在驾驶舱 P6面板的低部。跳开关有一个打开 /闭合用的直流线圈。一个永久磁铁帮助跳开关闭合并锁定在闭合位。一个内部弹簧帮助跳开关打开并保持在松开位。这个跳开关有 6个主 115伏交流触点和 20个辅助触点。这些辅助触点用来控制 APU发电机跳开关位置及外部电源接触器，及驾驶舱内的灯光指示。跳开关的闭合或松开信号指示来自 P5-4面板。跳开关触点位置由 P5-4面板上的蓝色 “APU GEN OFF BUS”灯指示。跳开关可通过打开 P6面板低部的 P6-11及 P6-12电路跳开关后接近。 |
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