BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 73

MAIN BUS OFF Light
The MAIN BUS OFF light illuminates when
both sides of a generator line contactor are
deenergized. It is an indication that there is no
power on a main AC bus.
AUTO OFF/FAIL Switchlight
During manual operation, when pressed in,
the switchlight latches and AUTO OFF illu-
minates, indicating that the bus can only be fed
from its own generator.
During automatic operation, the FAIL light il-
luminates when a bus fault is detected and
isolated by the system. Both FAIL lights il-
luminate if the APU generator is feeding the
faulty bus.
NO. 2 MAIN DC
RIGHT BATTERY
BUS (CBP-B)
BUS (CBP-B)
DC ESSENTIAL
BUS (CBP-D)
EXTERNAL DC
CONNECTION
NO. 1 MAIN DC
BUS (CBP-A)
LEFT BATTERY
BUS (CBP-A)
FROM AC
BUSES
TRANSFORMER
RECTIFIER UNITS
Figure 2-16. DC System Components Locations
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
Voltage and Frequency
Metering
A rotary selector allows for the monitoring of
AC voltage and frequency on separate meters.
The rotary selector positions are labeled "EXT
PWR," "GEN 1," "APU," "GEN 2," and "ADG."
DC SYSTEM
DC supply can be subdivided into two systems,
static conversion and battery. In normal op-
eration, primary DC power is derived from
the AC system through the use of four trans-
former-rectifier units (TRU) located in the
forward unpressurized avionics bay (Figure 2-
16). The battery system provides power to
MAIN BATTERY
AUXILIARY BATTERY
LEGEND
BATTERY AND EXTERNAL POWER
AC POWER
DC STATIC CONVERSION
CHARGER
MAIN BATTERY
AFT ELECTRICAL
DISTRIBUTION BOX (JB4)
CL 601-3A/R 2-13
L t é e
L t d .