Learjet 60 - DC Generation and Start (Figure 4-1)

Learjet 60
PRO
0 .
#1 BATTERY
EXTERNAL POWER
RECEPTACLE
#2 BATTERY
1 BATBUS
2 BATBUS
O
a
O
r EXTERNAL POWER
r OVER-VOLTAGE r
CUTOUTCIRCUIT r
--------------
0
R STANDBY
PUMP
R
START
R GEN
Clos
; 6 z
R MOTIVE FLOW
VALVE
EMER
BUS
Ground when either generator is on-line .
NOTE :

Airstart circuit not shown .
PM-123
Change 4
NORMAL
OFF
BATTERY 1
#1 BATTERY
RELAY
#2 BATTERY
RELAY
BATTERY 2
OFF
R JET
PUMP
R STBY
PUMP
RS~RT~
O +F
01
R GEN
LGEN
RESET
NORM
r LGENERATOR r
CONTROL
UNIT
SPEED SENSOR
STARTER/GEN
APU SYSTEM (if installed)

r
(Certified for ground operation only)

r
r
r
a
r
n
r
r
r
n
APU Control Inputs
-------------
28 VDC
OUT
DC GENERATION AND
START
Figure 4-1
Pilot's Manual
© PS,nsnninn A
<> E 7
4-5/4-6 (Blank)
GENINTERPOLE!
'IRESET
FIELD
GENBUS28V
GEN BUS SENSE,
1 START IN
+ GEN LINE RELAY
owl CURRENT
.=o
SENSOR
~i W
n
.
START OUT
EQUALIZER BUS
LGEN
.
LINE RELAY-
Ir
0 ox
i
V
--
I
.
w co
O m
R START
, R GENERATOR
R GEN -
CONTROL UNIT
LINE RELAY
i=e
.
EQUALIZER BUS
START OUT
GEN
LINE RELAY
V -~
STARTIN r \F
GENBUS SENSE +
y .
(RESET
GENBUS 28V ;
CURRENT
FIELD
i
.
SENSOR
r GENINTERPOLEt
.
SPEEDSENSOR, - _ _ _
STARTER/GEN
.