-
Channel 2 is allocated to APU Generator or External Power (EXT PWR).
Electrical Generation Interface Unit - Schematic Diagram
Figure 005
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The information provided to the SDACs is as follows:
- POR voltage (phase A),
- Load (phase A),
- Line Frequency (phase A),
- Oil Inlet/Outlet Temperature,
- Overload,
- Generator Fault,
- IDG Disconnect Status,
- IDG Low Oil Pressure,
- External Power available,
- External Power ON.
R **ON A/C 401-499,
R (c) Maintenance BITE
R The maintenance BITE is intended to operate with the relevant
R generator not running. The maintenance BITE is executed only,
R upon command from the GAPCU. The GAPCU only requests the
R maintenance BITE if requested by the Centralized Fault Display
R Interface Unit (CFDIU).
R For more details, refer to 24-41-00 Para. BITE Test.
R (d) Communication between the GCU and the SDAC
R The other functions on the GCU is to provide main electrical
R parameters to the SDACS via ARINC 429 data links.
R The infomation provided to the SDACs is as follows:
R - POR voltage (phase A),
R - Load (phase A),
R - Line Frequency (phase A),
R - Oil Inlet/Outlet Temperature,
R - Overload,
R - Generator Fault,
R - IDG Disconnect Status,
R - IDG Low Oil Pressure.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
Analog and discrete input parameters are listed below: Channel 1: Analog and Discrete Input Parameters
-------------------------------------------------------------------------------| PARAMETER DEFINITION |IDG1|IDG2| STATE | COMMENTS | |-----------------------------|----|----|-------------|-----------------------| | POR VOLTAGE 115 VAC, 400 Hz | X | X | | Parameter for defini- | | (PHASE A) | | | | tion of AC voltage | | | | | | and frequency | |-----------------------------|----|----|-------------|-----------------------| | AC LOAD | X | X | | | | | | | | | |-----------------------------|----|----|-------------|-----------------------| | IDG OIL INLET TEMPERATURE | X | X | | | | | | | | | |-----------------------------|----|----|-------------|-----------------------| | IDG OIL OUTLET TEMPERATURE | X | X | | | | | | | | | |-----------------------------|----|----|-------------|-----------------------| | OVERLOAD WARNING | X | X | Ground when | | | | | | overload | | |-----------------------------|----|----|-------------|-----------------------| | GENERATOR FAULT | X | X | 28 VDC when | | | | | | FAULT | | |-----------------------------|----|----|-------------|-----------------------| | IDG DISC. STATUS | X | X | Ground when | | | | | | DISC | | |-----------------------------|----|----|-------------|-----------------------| | IDG DISC P/BSW POS | X | X | Ground when | From P/BSW contact | | | | | ON | relay | |-----------------------------|----|----|-------------|-----------------------| | IDG OIL LOW PRESSURE | X | X | Ground when | From IDG low pressure | | | | | low pressure| switch | | | | | | | | | | | | | |-----------------------------|----|----|-------------|-----------------------| | GEN P/BSW POSITION | X | X | 28 VDC when | From GCU TR source | | | | | ON | (through PR) | -------------------------------------------------------------------------------
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-22-00Page 40 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1
R **ON A/C 401-499,
R Analog and discrete input parameters are listed below:
R -------------------------------------------------------------------------------
R | PARAMETER DEFINITION |IDG1|IDG2| STATE | COMMENTS |
R |-----------------------------|----|----|-------------|-----------------------|
R | POR VOLTAGE 115 VAC, 400 Hz | X | X | | Parameter for defini- |
R | (PHASE A) | | | | tion of AC voltage |
R | | | | | and frequency |
R |-----------------------------|----|----|-------------|-----------------------|
R | AC LOAD | X | X | | |
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