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H4
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H3
H1
H4
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H1
INPUT CHANGE BOARD
INPUT CHANGE BOARD
STRAPPED FOR 440V OPERATION
STRAPPED FOR 220V OPERATION
ASf07057
Figure 7-57.--AC input change board.
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INPUT C H A N G E B O A R D S T R A P P E D F O R 4 4 0 V O P E R AT I O N
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I N P U T C H A N G E B O A R D S T R A P P E D F O R 2 2 0 V O P E R AT I O N
ASf07058
Figure 7-58.--DC input change board.
An 80-horsepower electric motor drives the ac
Q7-24. In which of the following locations is the
generator. The generator output is rated 115/200 Vac at
MMG-1A primarily used?
60 kVA. One phase of the input voltage is stepped
1. In the hanger bays of shore stations and
down to 28 volts by a transformer and rectified for
aircraft carriers
direct current. It is capable of supplying 500 amperes
2. On the flight line of shore stations
continuously and 1,000 amperes intermittently for
3. On the flight deck of an aircraft carrier
4. One the flight deck and hanger bays of
starting only. The ac and dc outputs are monitored and
aircraft carriers
controlled by an electronic voltage regulator and fault
protection module. The module consists of a
Q7-25. What is the input voltage required to run the
motherboard assembly and four removable printed
MMG-1A?
circuit board inserts. The module ensures a stable
1.
115 Vac, 400 Hz
generator output. If the output deviates, it energizes a
2.
220 Vac, 400 Hz
3.
15/200 Vac, 60 Hz
serviced.
4.
220/440 Vac, 60 Hz
7-47