Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (96)
Page 41 of 90
CHAPTER 96 – ELECTRICAL SYSTEM (96-00-00)

COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
4
Date: 11.06.01
96.3.23.9 Set ENGINE FUEL switch to ON.
Verify battery voltage is present between pin A
and ground.
96.3.23.10 Set START switch on copilot
collective (if installed) to OFF. Verify no voltage is
present between pin A and ground.
96.3.23.11
Set ENGINE FUEL switch to OFF.
96.3.23.12
Set BATTERY switch to OFF.
96.3.23.13
Close STARTER circuit breaker.
96.3.23.14
Reconnect connector from engine
ignition unit.
96.4 AC POWER SYSTEM
96.4.1 AC Power System
96.4.1.1
Alternating current (AC) power is
supplied by two 115/26 VAC, 400 Hz, single
phase, 250 VA, solid state inverters (PS1 & PS7).
Both inverters are powered from the Main DC
Buss. AC power is normally supplied by the # 1
inverter while the # 2 inverter acts as a backup
and will automatically take over provided the # 2
inverter switch is in the AUTO/ON position.
Caution light segments are provided for each
inverter system and are connected to the AC
voltage sensing relays. If installed, an inverter
blower (B27) will also run any time the # 2 inverter
is providing AC power.
96.4.1.2
Part numbers of inverters used in
the helicopters are listed in the IPB for both
inverters.
96.4.2 Inverter
96.4.2.1
Data is given for ASH584-1, -5,
inverters. Data is typical of other inverters.
Inverter output voltage reading will vary according
to DC input and AC load of the inverter.
96.4.2.2
Input power requirements for
ASH584-1, -5 inverter:
28VDC – 11.9 Amps normal at 100% load.
28VDC – 13.7 Amps at 100% load.
28VDC – 17.8 Amps at 150% load.
96.4.2.3
Output power characteristics for
ASH584-1, -5 inverter:
115VAC
+5%, -7% (120.75 to 106.95VAC)
26VAC +5%, -7% (27.3 to 24.18VAC)
96.4.2.4
Voltage regulator limits for ASH584-
1, -5 inverter:
115VAC
+5%, -7% (120.75 to 106.95VAC)
26VAC

1.2VAC (27.2 to 24.8VAC)
Frequency 400 Hz

1.0%.
96.4.2.5
ASH584-1, -5 inverter delivers rated
AC power output over input DC voltage range of
22 to 32 volts with nominal of 28VDC.
96.4.3 Removal – Inverters PS1 or PS7
96.4.3.1 Disconnect
battery.
96.4.3.2
Ensure all electrical power is OFF.
96.4.3.3
Disconnect electrical connector and
protect with cap or tape.
96.4.3.4
While supporting inverter, remove
mounting bolts.
96.4.3.5
Carefully lower and remove inverter
from compartment.
96.4.4 Inspection – Inverters PS1 or PS7
96.4.4.1
Cracked or damaged cases could
impair proper operation of the inverter.
96.4.4.2
Check for proper bonding and
mounting hardware.
96.4.4.3
Check for broken connector pins or
cracked connector inserts.
96.4.5 Installation – Inverters PS1 or
PS7