R **ON A/C ALL
(d)
CSM/G drive In emergency conditions, a hydraulic motor speed-controlled by a servo-valve speed regulator drives the CSM/G. The regulator uses the oil flow from the Blue Hydraulic system to maintain the CSM/G at a constant speed. In normal conditions, an electric pump supplies the Blue hydraulic system. In emergency conditions, the Ram Air Turbine (RAT) supplies the Blue system.
(e)
CSM/G and CSM/G control unit Loss of the AC BUS 1 and AC BUS 2 automatically controls the RAT and the CSM/G. The MAN ON guarded pushbutton switch located on the EMER ELEC PWR panel on the cockpit overhead panel serves to manually control the RAT and the CSM/G. This control is redundant with the automatic RAT deployment. The CSM/G control unit enables full control of the CSM/G. The leading particulars of the CSM/G are:
-Nominal Power: 5 KVA at POR
-Voltage: 115/200 VAC, three-phase, 400 Hz. The main functions of the control unit are:
-
to control the servo-valve excitation for speed regulation,
-
to regulate the generator voltage by the field current,
-
to protect the network and the generator by control of the
associated GLC and the generator field current. The EMER GEN TEST guarded pushbutton switch on the EMER ELEC PWR panel allows to test the CSM/G on the ground, with the Blue electric pump running.
(f) Static inverter The static inverter, with a 1000 VA nominal power, transforms the direct current from the battery 1 into a single phase, 115 V 400 Hz, alternating current. The static inverter is automatically activated if AC BUS 1 and AC BUS 2 are lost and the CSM/G is unavailable. For maintenance purposes, the static inverter delivers FAULT indication to the Centralized Fault Display System (CFDS) through the two Battery Charge Limiters (BCL).
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
(2) Transfer Circuit
The transfer circuit enables supply of either AC electrical network
or both from one of the four power sources (GEN 1, GEN 2, APU GEN,
EXT PWR) via the Bus Transfer Contactors (BTC). BTC control is
entirely automatic and depends on the availability of these sources
and the correct condition of each network. The BTC 1 closes, if no
interlock condition exists on the GCU 1:
- when the GEN 1 is not available, in order to supply the network 1
from another power source (GEN 2 APU GEN or EXT PWR),
- to supply the network 2 from the GEN 1, if the GEN 2, APU GEN and
EXT PWR are not available.
The BTC 2 control is symmetrical to BTC 1.
The GCU 1 or GCU 2 enables closure of the BTC 1 or BTC 2 if no
undervoltage condition and no "GLC welded" failure occurred (Ref:
24-22-00).
The networks 1 and 2 are supplied in priority order:
- by the corresponding generator,
- by the ground power unit,
- by the APU GEN,
- or by the other generator.
NOTE : Locking of the two BTCs and isolation of the two channels is____
possible by action on the BUS TIE pushbutton switch; this
control is located on the ELEC panel on the cockpit overhead
panel.
R **ON A/C 401-499,
R
R (2) Transfer Circuit
R The transfer circuit enables supply of either AC electrical network
R or both from one of the four power sources (GEN 1, GEN 2, APU GEN,
R EXT PWR) via the Bus Transfer Contactors (BTC). BTC control is
R entirely automatic and depends on the availability of these sources
R and the correct condition of each network. The BTC 1 closes, if no
R interlock condition exists on the GCU 1:
R - when the GEN 1 is not available, in order to supply the network 1
R from another power source (GEN 2 APU GEN or EXT PWR),
R - to supply the network 2 from the GEN 1, if the GEN 2, APU GEN and
R EXT PWR are not available.
R The BTC 2 control is symmetrical to BTC 1.
