MULTIQUIP DCA Series - Armature Resistance Measurement Procedure

GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23) — PAGE 35
Figure 35. Main Armature Resistance Check
U1
X1
U2
X2
V1
YI
V2
Y2
W1
Z1
W2
Z2
ARMATURE
WINDINGS
U
U1 X1 U2 X2
V
V1 Y1 V2 Y2
W
W1 Z1 W2 Z2
DISCONNECT
12 BLACK LOAD
LEAD WIRES
FROM VSS
VOLTAGE SELECTOR
SWITCH USED ON DCA150
GENERATOR MODELS
AND BELOW
TURN
SELECTION
DIAL TO
Ω
POSITION
EXAMPLE:
DCA25SSIU4F = 0.133
Ω
VOLTAGE CHANGE-OVER
BOARD USED ON DCA180
GENERATOR MODELS
AND ABOVE
DISCONNECT
10 BLACK LOAD
LEAD WIRES
FROM VOLTAGE
CHANGE-OVER BOARD
BUSS BARS
JUMPER
PLATES (6)
12 BLACK LOAD
LEAD WIRES
10 BLACK LOAD
LEAD WIRES
X
U2 U1
V2 V1
W2 W1
Y
Z
O
V2
X
V1
0
U2
U1
Y
W2
Z
W1
U
W
EXAMPLE:
DCA180SSJU4F3 =
0.013Ω
TURN
SELECTION
DIAL TO
Ω
POSITION
ARMATURE
WINDINGS
V2
O
U2
A
B
O
W2
O
V
U1 X
V1 Y
W1 Z
MULTIMETER
RANGE
MIN MAX
MULTIMETER
Auto0 600
OFF
Hz
C
A
mA
uA
F
V
Hz
V
mV
Hz %REL
HOLD/LIGHT
10 A MAX
mAµA
COM
RANGE
MIN MAX
MULTIMETER
Auto0 600
OFF
Hz
C
A
mA
uA
F
V
Hz
V
mV
Hz %REL
HOLD/LIGHT
10 A MAX
mAµA
COM
MULTIMETER
MAIN ARMATURE WINDINGS RESISTANCE TEST