MULTIQUIP DCA Series - Voltage Flow Diagram

GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23) — PAGE 31
VOLTAGE FLOW DIAGRAM
Figure 31. Voltage Flow Diagram
120
YEL
T
S
AC VOLTMETER
CHANGE-OVER
SWITCH
V-W
U-V
OF
W-U
R
YEL
(-)
RELAY
UNIT (RY2)
(+)
2
1
3
4
V1
U1
W1
U2
W2
1
3
1 2 3
3 2 1
V1
U1W1
U2
W2
1
3
CN15
CN7
CN14
RED
WHT
VOLTMETER
WHT
RED
GREEN
YELLOW
NORMALLY
OPEN CONTACT
NOT USED
WHITE
U
V
W
MAIN
CIRCUIT
BREAKER
(CB1)
GREEN
GND.
2
6
1
0
42
46
4
8
12
48
1 PHASE
240/120
3 PHASE
240/139
3 PHASE
480/277
PSS TO LOCK
44
VSS EVEN
TERMIMALS
RED
V1
V1
LINE
LOAD
REDBLUE
BLUE
WHT
STATOR
WINDINGS
12 WIRES
U
U1 X1 U2 X2
V
V1 Y1 V2 Y2
W
W1 Z1 W2 Z2
U1
CT1
CT2
CT3
W1
V1
K
L
K
L
K
L
X2
MAIN
STATOR
TO CHASSIS
GROUND
GRN
REFERENCE
CURRENT FLOW DIAGRAM
TERMINALS 29/33 ON VSS
REFERENCE
CURRENT FLOW DIAGRAM
TERMINAL 32 ON VSS
NOTICE
The voltage ow diagram (Figure 31) is representative
of a DCA45SSIU4F type generator.