Generac Power Systems 8 kW LP - Manual (Page 65)

NEUTRAL
CONNECTION
SWITCH
SW3
NO
C1
COM
SW2
VR1
NC NC
COM
C2
VR2
NO
TR1
15B
23
1
7
4
7 9
3 6
9
F2
CIRCUIT 10
BLACK (MAIN 1)
CONTROL
TRANSFER
RED (MAIN 2)
NEUTRAL (WHITE)
NEUTRAL (WHITE)
23
0
F1
N2
N1
15B
23
BLACK
RED
N2
N1
15B
240VAC TO
TO GENERATOR
OUTPUT
PANEL
MAIN DISTRIBUTION
T1
T2
T1 T2
E2
E2
E2
E2
E1
E1
N1A
N1A
N2A
N2A
B
B
B
B
B
E1
E1
E1
N1A N1A
N1A
15B
23
E1
E2
205
205
126
126
E2
N1A
N2A
N2A
A
N2A
240VAC
OUTPUT
GENERATOR
TS TO
CONTROL PANEL
A
B
SW1
LC
CIRCUIT 9
CIRCUIT 6
CIRCUIT 5
CIRCUIT 2
CIRCUIT 1
CIRCUIT 3
CIRCUIT 4
CIRCUIT 7
CIRCUIT 8
CIRCUIT 11
CIRCUIT 12
CIRCUIT 13
CIRCUIT 14
CIRCUIT 16
CIRCUIT 15
14 CIRCUIT LO
AD CENTER
12 CIRCUIT LO
AD CENTER
10 CIRCUIT LO
AD CENTER
8 CIRCUIT LO
AD CENTER
T1
T1
F3
0
WIRE
-
WIRE
BLK
+
RED
BC
0
16 CIRCUIT LO
AD CENTER
BC-BATTERY CHARGER
N-NEUTRAL
TR1-TRANSFER RELAY
SW2,SW3-LIMIT SWITCHES
TB1-TERMINAL STRIP
F1,F2,F3-5A, 600V FUSE
C1-UTILITY COIL & RECTIFIER
C2-GENERATOR COIL & RECTIFIER
SW1-AUTOMATIC TRANSFER SWITCH
(16 CIRCUIT SHOWN FOR REFERENCE ONLY)
LC-CIRCUIT BREAKER (LOADS)
LEGEND
SENSING
UTILITY
INSIDE
GROUND (GREEN)
GROUND (GREEN)
UTILITY
GENERATOR
GROUND
DC
utility Source VoltaGe Failure
If utility source voltage should drop below a preset value, the generator circuit board will sense the dropout. The
circuit board will then initiate generator cranking and startup after a time delay circuit times out.
Figure 4 is a schematic representation of the transfer switch with generator power available, waiting to transfer.
• Generator voltage available E1, E2.
• Circuit board action holding Wire 23 open to ground.
• Power available to standby coil C2, upon closure of TR1, normally open contacts (9 & 6) will close and initiate a
transfer.
Page 63
TRANSFER SWITCH
sEctioN 3.2
oPEratioNal aNalYsis
Part 3
Figure 4. Generator Power Available, Waiting to Transfer.