R **ON A/C 106-149, 151-199, 204-299, 301-399, 401-499,
The static inverter is used in these cases:
-APU start (supply of fuel pump),
-engine start on batteries (ignition),
-Ram Air Turbine (RAT) deployment (< 10s) (supply of ECAM display units), - on ground, on batteries only (pushbutton switch supply),
Contactor and Fuse - Component Location
Figure 001
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Static Inverter - Component Location
Figure 002
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R - in emergency configuration after landing, when the CSM/G is switched off R (supply of the 115 VAC ESS BUS 4XP instead of the CSM/G).
R **ON A/C ALL
4. Operation/Control and Indicating
________________________________
(Ref. Fig. 003)
The static inverter starts automatically if:
-
the AC BUS 1 and 2 are lost,
-
the CSM/G is not available, and
-speed is more than 50 Kts.
When the static inverter is faulty, it generates a permanent ground signal
to the BCL1.
The presence of the ground signal means:
- overheat,
- output overvoltage,
-
input undervoltage,
-
input overvoltage.
The static inverter defect is sent to the battery charge limiter 1 which
stores it in a memory as a class I failure.
When the network is supplied, STATIC INV FAULT message appears on the upper
ECAM display unit.
The fault indication will be available during BCL BITE reading from the
Centralized Fault Display System (CFDS).
5. Test
____ On the ground, the static inverter can be checked applying the following procedure (aircraft supplied by EXT POWER or APU GEN):
-EMER GEN TEST: ON
-BUS TIE: OFF
-On the ECAM ELEC page, check voltage and frequency of static inverter.
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Static Inverter - Schematic Diagram
Figure 003
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1 STATIC INVERTER (GENERATION) - ADJUSTMENT/TEST
______________________________________________
TASK 24-28-00-710-001
Operational Test of the Static Inverter (3XB) when the Aircraft Electrical Circuits are Energized from the External Power
1. Reason for the Job
__________________
Refer to the MPD TASK: 242800-01 Test of the correct power supply of the DC ESS BUS, AC ESS BUS and AC STAT INV BUS in emergency configuration when the batteries are the only power supply source.
NOTE : If the external power is not available, there is an alternative
____ method (with the APU) for this procedure. This task gives the first method. For the alternative method, refer to the other task in this page block.
NOTE : If the external power is available and the APU is in operation, you
____
must refer to the alternative method with the APU to do the
operational test of the static inverter.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.8 m (5 ft. 11 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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