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并鎖定在閉合位。一個(gè)內(nèi)部彈簧幫助跳開關(guān)打開并保持在松開位。這
個(gè)跳開關(guān)有6 個(gè)主115 伏交流觸點(diǎn)和20 個(gè)輔助觸點(diǎn)。這些輔助觸點(diǎn)
用來控制APU 發(fā)電機(jī)跳開關(guān)位置及外部電源接觸器，及駕駛艙內(nèi)的
燈光指示。跳開關(guān)的閉合或松開信號(hào)指示來自P5-4 面板。跳開關(guān)觸
點(diǎn)位置由P5-4 面板上的藍(lán)色“APU GEN OFF BUS”燈指示。跳開關(guān)
可通過打開P6 面板低部的P6-11 及P6-12 電路跳開關(guān)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 伏直流電關(guān)閉的應(yīng)用，允許線圈瞬時(shí)接通。當(dāng)跳開關(guān)閉合時(shí)，線圈
通過輔助觸點(diǎn)斷電，跳開關(guān)通過永久磁鐵被保持在閉合位。28 伏直流
電松開的應(yīng)用，將線圈極性反向，觸點(diǎn)在彈簧的幫助下打開。線圈通
過輔助觸點(diǎn)斷電。
(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.
從外部電源的（地面電源）400HZ，115 伏三相交流電也能夠提供到
飛機(jī)上供系統(tǒng)使用。外部交流電源系統(tǒng)包括一個(gè)外部電源插座，匯流
條防換板，兩個(gè)外部電源接觸器、繼電器、開關(guān)及指示燈。外部交流
電源插座位于飛機(jī)右側(cè)、前輪艙前方。匯流條防護(hù)板用來保護(hù)與外部
電源連接的飛機(jī)線路。兩個(gè)接觸器將外部來的115 伏，400HZ 的三相
交流電源接到分配系統(tǒng)。
(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 伏交流電源由兩臺(tái)發(fā)動(dòng)機(jī)驅(qū)動(dòng)的發(fā)電機(jī)、APU 發(fā)電機(jī)或地面電源
提供。它被發(fā)動(dòng)機(jī)跳開關(guān)、APU 跳開關(guān)或地面電源觸點(diǎn)連接到發(fā)電機(jī)
主匯流條上，它也可以通過轉(zhuǎn)換繼電器接到兩個(gè)轉(zhuǎn)換匯流條上。外部
電源也能夠供到外部交流匯流條及地面服務(wù)匯流條上。地面服務(wù)匯流
條也能夠從一號(hào)發(fā)電機(jī)匯流條供電。
(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.
通過轉(zhuǎn)換主匯流條、轉(zhuǎn)換匯流條或地面服務(wù)匯流條上的電源可得到28
伏交流電。28 伏直流電由電瓶及轉(zhuǎn)換整流器到電瓶匯流條和兩個(gè)直流
匯流條。28 伏直流電被繼電器接到這個(gè)匯流條上。電瓶充電器由115
伏交流電供電。電源系統(tǒng)由115 伏交流和28 伏直流電提供。備用交
流和直流電由正常交流和直流電提供。另一方面，電瓶為備用系統(tǒng)提
供電源。備用電源組件位于電子艙、P5 及P6 面板。備用電源分配的
目的是在無法正常供電的期間為必要系統(tǒng)提供115 伏交流電或28 伏
直流電。
LESSON 20 NAVIGATION 導(dǎo)航
一、單詞
導(dǎo)航Navigation 計(jì)算Compute 運(yùn)動(dòng)Movement
包含Include 子系統(tǒng)Subsystem 自動(dòng)定向儀Automatic
director finder
相對(duì)方位Relative bearing 甚高頻全向信標(biāo)Very high
frequency
omnirange
儀表著陸系
統(tǒng)
Instrument
landing system
磁方位角Magnetic bearing 偏離航線Course
轉(zhuǎn)動(dòng)Turn 最佳的Optimum 測(cè)距儀Distance
measure
equipment
斜距Slant range 空中交通管制Air traffic
control
識(shí)別Identification
高度Altitude 大氣數(shù)據(jù)系統(tǒng)Air data
system
全壓Pitot pressure
靜壓Static pressure 不同的Various 慣性基準(zhǔn)系
統(tǒng)
Inertial reference
　
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