Battery Master Switch - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

LEGEND
UNPOWERED
POWERED BUS
BATTERY POWER
Figure 2-20. Battery Master Switch OFF (All Power Off)
BATTERY SYSTEM
The battery supplies the battery direct bus via
the external DC contactor. The battery is a
nickel-cadmium (nicad) with a nominal out-
put of 24 volts and a rating of 43 ampere-
h o u r s . T h e b a t t e r y i s l o c a t e d i n t h e a f t
equipment bay (Figure 2-16) and is kept
charged by a separate battery charger unit.
The battery charger is powered from AC bus
2 (Figure 2-20). There are two circuits: a
charging circuit and a monitoring circuit. The
charging circuit is capable of bringing the bat-
tery from a 30% charge to a 100% charge in
one hour. The battery-charging circuit is au-
tomatically inhibited if the monitor circuit
detects a cell imbalance, high battery tem-
perature, or a faulty battery temperature sen-
sor. The battery charger is installed in the aft
equipment bay, above and outboard of the bat-
tery. Illumination of the CHARGER light on
the overhead panel indicates that:
• Power is not available to the charger unit.
• There is a battery cell imbalance.
• There is a battery temperature abnormality.
• The battery contactor is closed and the
battery is being used.
2-16 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
ESS ESS
TRU 1 TRU 2
D9 D8
D7
ESS DC BUS
D4
D10
D5
EMER
SENSOR
DC 1 TC
RELAY
BATT BUS
BATTERY CONT
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
EMER
DC 2 TC
W OFF W
E8
BATTERY
MASTER
D6
BATT DIR BUS
BATTERY OVERLOAD
Should an overload occur when the battery is
connected to the battery bus, the battery re-
mote-control circuit breaker (RCCB) trips and
takes the battery off line. The RCCB trips at
50 amps to protect the battery from a short cir-
cuit on the battery contactor or the battery
bus (Figure 2-20). The RCCB is physically lo-
cated in the aft equipment bay. When it trips,
it also trips the BATT RCCB CONT circuit
breaker on the DC essential bus in the cock-
pit. Resetting this breaker provides a reset
function to the RCCB.
BATTERY CONTACTOR
When there is no AC power on the airplane and
essential TRUs 1 and 2 are unpowered, the
battery supplies power to the battery bus
through the battery contactor. When AC power
is available, essential TRUs 1 and 2 supply
the DC essential bus and the battery bus. In
order for the battery to supply power to the bat-
tery bus, the battery master switch must be in
the ON position and both essential TRUs must
be unpowered. In this case, the sense relay
which monitors the output from both essential
TRUs is deenergized and causes the battery
contactor to close. If the ADG is the only
source of power, the sense relay will be deen-
ergized causing the battery contactor and the
L t é e
L t d .
MAIN AC BUS 2
B32
BATT
CHGR
MAIN
BATT
EXT
DC TC
EXT DC