MULTI FUNCTION DISPLAY (MFD) ELECTRICAL PAGE CALLOUTS (cont’d)
6. DIGITAL DISPLAY OF DC BUS VOLTAGE (white)
- indicates the voltage on the associated bus
7. DIGITAL DISPLAY OF APU GENERATOR LOAD (white)
APU GEN
(white)
LOAD
(cyan)
- is activated only if the APU is installed depending on the aeroplane configuration
- the load demand on the APU generator is displayed in the following format:
• “+” sign is displayed on the left of the lead digit to indicate an overload of the DC
power source
• nothing is displayed when the load is in the expected range
• leading zero is suppressed in the lead digit position
• digital number gives the rate of the load, with 1.00 equal to 100% of load examples:
• “.60” indicates that the DC generator or TRU is loaded at 60% of the maximum out-
put
• “+1.30” indicates an overload of the DC generator or TRU
8. AC EXTERNAL POWER ANNUNCIATION (green)
- displayed when an AC external power source is connected to the aeroplane and supply-
ing AC power
9. AC GEN VOLTAGE AND LOAD ANNUNCIATION AREAS
AC GEN 1
and
AC GEN 2
(white)
VOLT, LOAD
(cyan)
A, B, C
(white)
10. DIGITAL DISPLAY OF AC VOLTAGE (white)
- displays AC bus voltage for each phase
Dash8 - Q400 - Electrical
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