the EXT BATT CHG switch off, and set the
EXT PWR switch to ON. Press one MWS
red lamp to cancel both. Press the MWS
TEST button and check that all the MWS
annunciators illuminate, the ELECT repeater
flashes, and the MWS red lamps flash. Re-
lease the test button and cancel the MWS
flashers. Switch on minimum flight com-
partment lighting and check that all switched
PE loads, fuel pumps, external lights, pitot
heaters, radio, and radar instrument switches,
etc., are off. A battery capacity check as
found in the AFM should be accomplished.
If ground power or APU power is not available,
return the BATT switch to OFF until imme-
diately prior to engine starting.
AC POWER
Power for windshield and side window heat-
ing is supplied from two variable-frequency
alternators. For information on the windshield
anti-icing system, refer to Chapter 10, “Ice and
Rain Protection.”
INVERTERS
Single-phase, 115-volt, 400-Hz AC is pro-
vided by two static main inverters installed in
the rear equipment bay. Normally, the No. 1
inverter feeds XS1 and XE distribution lines,
and the No. 2 inverter feeds XS2. Either in-
verter is, however, capable of feeding all dis-
tribution lines, and changeover is achieved
automatically if one inverter fails.
In the event of failure of both main inverters, AC
supply is automatically provided by a standby
static inverter installed in the rear equipment bay.
The output from this inverter is connected to dis-
tribution line XE and supplies only the essen-
tial AC-operated systems.
Both 6- and 26-volt AC supplies are provided
via two transformers. The No. 1 transformer
is powered from the XE bus and the No. 2
transformer from the XS1 bus.
Inverter controls, indicators, and locations
are shown in Figure 2-23 and are contained in
Table 2-2.
2-22
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
Figure 2-23. Inverter Controls and
Indicators
Table 2-2. INVERTER CONTROLS AND LOCATIONS
ITEM
LOCATION
STOP/START switches, INV 1 and 2
ELECTRICAL AC POWER section
STBY INV ARM/OFF switch of the roof panel
Voltage selector switch, XS1, XE, and XS2
VOLTS meter
STBY INV ON annunciator
FAIL annunciators INV1, INV2, XS1, XS2 (amber), and XE (red)
ELECT annunciator
MWS center panel
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