Utility Restored - Generac Power Systems 10 kW LP Repair Manual

sEctioN 3.2
oPEratioNal aNalYsis
Utility voltage is restored and is available to Terminals N1 and N2. The utility voltage is sensed by the generators
circuit board. If it is above a preset value for a preset time interval a transfer back to utility power will occur.
E1
N1A
-
+
BLK
RED
WIRE
WIRE
BC
B
B
N2A
A
LEGEND
BC-BATTERY CHARGER
C1-UTILITY COIL & RECTIFIER
C2-GENERATOR COIL & RECTIFIER
F1,F2,F3-5A, 600V FUSE
LC-CIRCUIT BREAKER (LOADS)
(16 CIRCUIT SHOWN FOR REFERENCE ONLY)
N-NEUTRAL
SW1-AUTOMATIC TRANSFER SWITCH
SW2,SW3-LIMIT SWITCHES
TB1-TERMINAL STRIP
TR1-TRANSFER RELAY
Figure 7. Utility Restored, Generator Still Providing Output to Load.
Page 66

utility reStored

15B
E1
N1A
A
7 7 9 9
TR1
1 4 3 6
B
23
126 205
N2A
N1A
N1A
N2A
205
B
N1A
126
N2A
NO NC NC NO
SW3
SW2
COM COM
VR1 VR2
C1 C2
T1 T1 T2
SW1
N2A
B E2
F3
T1
B E2
0
15B 15B
23 23
F2
N2
F1
N1A
E1
E2
E1
E2
NEUTRAL
CONNECTION
INSIDE
SWITCH
E1
CIRCUIT 14
E2
E2 CIRCUIT 13
CIRCUIT 10
CIRCUIT 9
CIRCUIT 6
CIRCUIT 5
CIRCUIT 2
T1 CIRCUIT 1
T2 CIRCUIT 3
CIRCUIT 4
CIRCUIT 7
CIRCUIT 8
CIRCUIT 11
CIRCUIT 12
CIRCUIT 15
CIRCUIT 16
UTILITY
LC
DC
GROUND
GENERATOR
Part 3
TRANSFER SWITCH
0 0
CONTROL
15B
TRANSFER
23
N2
UTILITY
SENSING
240VAC
N1 N1 OUTPUT
E1 BLACK
TO GENERATOR
RED
OUTPUT
NEUTRAL (WHITE)
GROUND (GREEN)
GROUND (GREEN)
NEUTRAL (WHITE)
240VAC TO
RED (MAIN 2)
MAIN DISTRIBUTION
PANEL
BLACK (MAIN 1)
TS TO
GENERATOR
CONTROL PANEL