(2) Table of main discrete signals received and sent out by the SDAC1(2)
-------------------------------------------------------------------------------| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | -------------------------------------------------------------------------------|EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| | | | | | | | | | |CONV | -------------------------------------------------------------------------------| 002 00| BUS TIE | | | | 21 | | | | 10XU | | | P/B OFF | | | | | | | | | | 002 00| BUS TIE | | | | 21 | | | | 10XU | | | P/B ON | | | | | | | | | | 002 01|GEN1 LINE | | | | 14 | | | | 9XU1 | | |CNTOR ON | | | | | | | | | | 002 01|GEN1 LINE | | | | 14 | | | | 9XU1 | | |CNTOR OFF | | | | | | | | | | 002 01| TRANSFER | | | | 15 | | | | 11XU1 | | |CNTOR1 ON | | | | | | | | | | 002 01| TRANSFER | | | | 15 | | | | 11XU1 | | |CNTOR1 OFF| | | | | | | | | | 002 10|GEN2 LINE | | | | 14 | | | | 9XU2 | | |CNTOR ON | | | | | | | | | | 002 10|GEN2 LINE | | | | 14 | | | | 9XU2 | | |CNTOR OFF | | | | | | | | | | 002 10| TRANSFER | | | | 15 | | | | 11XU2 | | |CNTOR2 ON | | | | | | | | | | 002 10| TRANSFER | | | | 15 | | | | 11XU2 | | |CNTOR2 OFF| | | | | | | | |
NOTE : For some more information: see ATA Ref. 31-54-00.
____
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C. Power Contactor
(1) Technology The contactors are made up of a base with the power circuit connector terminals and a removable assembly mainly consisting of the motor, power contacts, auxiliary contacts and connector. It is possible to remove a contactor without removing the base to which power circuits are connected.
R **ON A/C 063-099, 106-149, 153-199, 206-299, 301-399, 401-499,
C. Power Contactor
(1) Technology The contactors are made up of a removable assembly which mainly consists of the motor, power contacts, auxiliary contacts and connector. The contactors are installed on a module or a base to which the power circuits are connected. It is possible to remove a contactor without removing the module or the base.
**ON A/C ALL
(2) Characteristics of main contacts
(a)
Three pole contactors: 2 types (260 A or 60 A) Nominal current
-260 A,
-60 A.
Overload at nominal voltage
-1.5 x In for 5 minutes
-2 x In for 1 minute
(b)
Single pole contactors: 3 types (100 A-200 A-300 A) Nominal current
-100 A,
-200 A,
-300 A.
Overload
-100 A, 200 A:
1.5XIn for 5 minutes
2XIn for 1 minute 5XIn for 1 second (only for 200 A contactors). - 300 A: in normal operation one cycle has an inrush current of 650 A to 950 A and cut off current of 150 A to 300 A (APU start contactor).
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
D. TDC AC Sensor If an open cable condition occurs with a current of more than 80A, after a 3 seconds delay, the TDC AC sensor 50XU1 (50XU2) supplies a 28 VDC signal to the GPCU and to the fire trip GCU1 (GCU2) input. The GCU1 (GCU2) does not energize its related GLC1 (GLC2) contactor.
R **ON A/C ALL
E. Lightning Protection Module The lightning protection modules (19XU1, 19XU2) protect the equipment supplied by the feeders of the IDGs (115V/400Hz, three-phase) against the lightning strikes.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
F. Current Transformer (CT)
**ON A/C 001-049, 051-062, 101-105, 151-152, 201-205,
(Ref. Fig. 001)
**ON A/C 063-099, 106-149, 153-199, 206-299, 301-399,
(Ref. Fig. 001A)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
(Ref. Fig. 002, 008) There are two CTs per AC main generation channel: - one CT is built into the IDG generator, - one six-hole CT is installed upstream of the generator line contactor.
Current Transformers - Block Diagram
Figure 008
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-22-00Page 54 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1
R **ON A/C 401-499,
R R R R R R R R F. Current Transformer (CT) (Ref. Fig. 001B, 002A, 008A) There are three CTs per AC main generation channel: - one CT is built into the IDG generator, - one three-hole CT is installed upstream of the generator line contactor, - one six-hole CT is installed upstream of the three-hole CT.
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