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14 Cards in this Set
- Front
- Back
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What are the 5 generators frequency directly related to? And when is 400 hz achieved?
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Directly related to RPM of respective engine(or APU). 400 hz = 100% RPM
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What do GCPs automatically control and connect?
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They control AC switching and distribution, and connect operating AC power sources to the AC buses.
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What does the Frequency Sensitive Relay (FSR) do?
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Under frequency protection. For example it removes generator from AC buses during LSGI.
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What voltage does the VR maintain and how?
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115 Vac. By varying the generator excitation field current.
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Where is the Electrical Control and Supply Rack(ESCR), and what components does it hold?
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Under the flight station. Contains = GCP(5), VR(5), Bearing Failure Relays (5)
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Why does the generator out light come on?
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1. Generator Line Contactor(GCL) is de-energized. 2. LSGI 3. Malfunction in generating system.
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What does the Generator Disconnect Switch do? What powers it?
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Essential DC. Mechanically disconnects the engine gear box, disconnector rotor, and generator rotor.
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What does the DISC FIRED Test light indicate?
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. If DISC FIRED illuminates during TEST it means the fusable element is not melted
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What are the generators rated at?
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40 KVA (40,000 volt/amperes)
120 208 VAC * Actual rated by VR = 115-200 VAC |
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What does the AC loadmeter indicate?
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Percent of Phase Load from generator. However, AC bus loads must be considered for true bus load.
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At 100% engine rpm, how many Hertz does the AC generator produce? And, what is the generator rotor rpm at 100% engine rpm?
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400 Hz , 6000 rpm
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Name the three generators inside the Main Generators.
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-8 pole main generator
-excitation generator -32 pole permanent magnet generator |
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Power source - APU Starter
CB Location - APU Cont Power source - APU Door Open Warning Light CB Location - APU Door open warn. |
Isolated DC
Pilot side Main DC Co pilot side |
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The APU starter current limiter limits ___amps.
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275 amps.
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