Guardian 5240 - Page 95

Page 93
DC CONTROL
SECTION 4.2
OPERATIONAL ANALYSIS
PART 4
• The utility closing coil (C1) energizes and moves the main current carrying contacts to their NEUTRAL posi-
tion. The main contacts move to an over center position past NEUTRAL and spring force closes them to their
UTILITY side. LOAD terminals are now powered by the UTILITY source.
• Movement of the main contacts to UTILITY actuates limit switches XA1/XB1. XA1 opens and XB1 actuates to
its STANDBY source side.
• The generator continues to run.
Figure 6. Circuit Condition - Utility Voltage Restored
WINDING
22
22
225A
56VA
225A
224A
224
225
225
14
224A
1VA
14
TX
0
0
23
224B
225B
194
0
1
7
2
16
14
0
0
4
6
0
0
0
BCR
6
7
3
9
4
9
22
0
FS1
62
0
0
11
16
13
BCR - BATTERY CHARGE RELAY
CB - CIRCUIT BREAKER, MAIN OUTPUT
IM1 - IGNITION MODULE, CYLINDER #1
HTO - HIGH OIL TEMPERATURE SWITCH
IM2 - IGNITION MODULE, CYLINDER #2
F1 - FUSE 15 AMP
FS1 - FUEL SOLENOID
44
DIAGRAM KEY
BA - BRUSH ASSEMBLY
33
CB
11
23194 N2 N1
33
0
SC
SM
SC
33
22
44
BATTERY
12V
RED
0
0
11
85
18
86
HTO
LOP
IM2
IM1
ENGINE AND
ALTERNATOR
SP1
SP2
FIELD
BA
0
SW1 - SWITCH, AUTO / OFF / MANUAL
TX - TRANSFORMER, 16 Vac 56 VA &
SW2 - SWITCH, SET EXERCISE
16 Vac 1 VA (DUAL SEC.)
SPST, N.C., ON-(OFF)
SCR - STARTER CONTACTOR RELAY
SP1, SP2 - SPARK PLUGS
DPDT, ON-OFF-ON
SC - STARTER CONTACTER
44
DPE
POWER
WINDING
22
11
33
S TATOR
CHARGE
WINDING
BATTERY
77 66
224A 225A
13
66
6
77
2
4
224
N2
N1
7766
11
22
0
7766
WINDING
POWER
I.C.T.
LC2
LC1
LC2
LC1
ICT - IDLE CONTROL TRANSFORMER
CS - IDLE CHOKE SOLENOID
11
0
FS2
LOP - LOW OIL PRESSURE SWITCH
SM - STARTER MOTOR
FS2 - FUEL SOLENOID(530cc V-TWIN ONLY)
16
NEUTRAL
CONTACTOR
OUTPUT TO
TRANSFER SWITCH
240VAC GENERATOR
12Vdc
COIL
RELAY
TRANSFER
UTILITY
INPUT
240VAC
TR