曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
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。
(5) Application of 28 volt dc to close, allows momentary energizing of the
coil . when the breaker closes, the coil deenergizes through the auxiliary
contact and the breaker is held closed by the permanent magnet.
Application of 28 volt dc to trip. Reverses the polarity of the coil and the
contactor opens assisted by the spring. The coil deenergizes through the
auxiliary contact.
28 伏直流电关闭的应用，允许线圈瞬时接通。当跳开关闭合时，线圈
通过辅助触点断电，跳开关通过永久磁铁被保持在闭合位。28 伏直流
电松开的应用，将线圈极性反向，触点在弹簧的帮助下打开。线圈通
过辅助触点断电。
(6) The 115 volt ac, 400HZ, 3-pahse power from an external source (ground
power unit ) can also be supplied to the airplane for systems use. The
external ac power system consists of an external power receptacle, bus
protection panel, two external power contactors, relays, switches and
indicating lights. The ac external power receptacle is located on the right
side of the airplane, forward of the nose wheel well, the bus protection
panel (BPP) is used for control and protection of the airplane circuits
connected to external power. The two external power contactors connect
115 volt ac, 400Hertz, 3-phase power to the distribution system from
external power source.
从外部电源的（地面电源）400HZ，115 伏三相交流电也能够提供到
飞机上供系统使用。外部交流电源系统包括一个外部电源插座，汇流
条防换板，两个外部电源接触器、继电器、开关及指示灯。外部交流
电源插座位于飞机右侧、前轮舱前方。汇流条防护板用来保护与外部
电源连接的飞机线路。两个接触器将外部来的115 伏，400HZ 的三相
交流电源接到分配系统。
(7) The 115 volt ac system is supplied by two engine driven generators, APU
driven generator or external power. The powr is connected to the generator
main busses by engine generator breakers. APU breakers and external
power contactors. Power is also supplied to two transfer busses through
transfer relays. External power can be supplied to the external ac bus and
the ground service bus (this bus is used for servicing of the airplane). The
ground service bus can also be supplied from generator bus NO.1.
115 伏交流电源由两台发动机驱动的发电机、APU 发电机或地面电源
提供。它被发动机跳开关、APU 跳开关或地面电源触点连接到发电机
主汇流条上，它也可以通过转换继电器接到两个转换汇流条上。外部
电源也能够供到外部交流汇流条及地面服务汇流条上。地面服务汇流
条也能够从一号发电机汇流条供电。
(8) The 28 volt ac system is obtained through transrformers from main,
transfer ,and ground service busses. The 28 volt dc power is supplied from
the battery and transformer rectifiers to the battery bus and two dc busses.
The power is connected to the busses by relays. The battery charger is
supplied with power from the 115 volt ac system. The electronic system
power is supplied from the 115 volt ac and 28 volt dc system. The standby
ac and dc busses are powered normally from the generated ac and dc
power. Alternately, the battery supplies power to the standby system. The
standby power components are located in the electronics compartment, P6
panel and p5 panel .the purpose of the standby power distribution is to
provide 115 volt ac and 28 volt dc power to essential system during
absence of normal supply.
通过转换主汇流条、转换汇流条或地面服务汇流条上的电源可得到28
伏交流电。28 伏直流电由电瓶及转换整流器到电瓶汇流条和两个直流
汇流条。28 伏直流电被继电器接到这个汇流条上。电瓶充电器由115
伏交流电供电。电源系统由115 伏交流和28 伏直流电提供。备用交
流和直流电由正常交流和直流电提供。另一方面，电瓶为备用系统提
供电源。备用电源组件位于电子舱、P5 及P6 面板。备用电源分配的
目的是在无法正常供电的期间为必要系统提供115 伏交流电或28 伏
直流电。
LESSON 20 NAVIGATION 导航
一、单词
导航Navigation 计算Compute 运动Movement
包含Include 子系统Subsystem 自动定向仪Automatic
director finder
相对方位Relative bearing 甚高频全向信标Very high
frequency
omnirange
仪表着陆系
统
Instrument
landing system
磁方位角Magnetic bearing 偏离航线Course
转动Turn 最佳的Optimum 测距仪Distance
measure
equipment
斜距Slant range 空中交通管制Air traffic
control
识别Identification
高度Altitude 大气数据系统Air data
system
全压Pitot pressure
静压Static pressure 不同的Various 惯性基准系
统
Inertial reference
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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航空工程英语基础（中英文对照）(100)
