Troubleshooting guide

26
Multiquip Inc. ◦ DCA Generators Troubleshooting Guide ◦ Manual No. DCATRBLSHOOT
CROSS REFERENCE CHART RESISTANCE MEASURED IN OHMS Ω
Main Armature
Generator Gen-Set
AVR Inputs
Model # Model #
Main Exciter A-B B-C
Armature Field Armature Field Field 2 C-D
AC Outputs DC+ DC- U V W J + K - D-A
DCA-25SSAI -
0.14 2 0.47 51 51 0.9 2.7
DCA-25SSI DB-0281
0.155 1.09 0.16 14 - 0.83 2.5
DCA-25SSI2 DF-0270
0.124 4 0.3 17.6 - 0.9 2.7
DCA-25SSIU / SSIU2 DF-0270
0.124 4 0.3 17.6 - 0.9 2.7
DCA-25USI / USI2 DF-0270
0.124 4 0.3 17.6 - 0.9 2.7
DCA-40SSAI -
0.1074 0.143 0.143 13 13 0.5 1.5
DCA-40SSI DB-0501
0.082 1.46 0.21 15 - 0.74 2.22
DCA-45SSIU DB-0501
0.082 1.46 0.21 15 - 0.74 2.22
DCA-45SSIU2 / SSJU3 DB-0501
0.082 1.46 0.21 15 - 0.74 2.22
DCA-45SSIU4 DH-0480
0.099 1.33 0.137 18.8 0.78 2.15
DCA-45USI DB-0501
0.082 1.46 0.21 15 - 0.74 2.22
DCA-45USI2 DH-0480
0.099 1.33 0.137 18.8 0.78 2.15
DCA-60SSAI -
0.042 0.93 0.143 12 12 0.41 1.25
DCA-60SSI / SSI2 DB-0661
0.048 1.8 0.21 15 - 0.61 1.83
DCA-70SSJU / SSJU2 DB-0831
0.032 1.2 0.08 17.3 - 0.37 1.11
DCA-70SSI / SSIU DB-0831
0.032 1.2 0.08 17.3 - 0.37 1.11
DCA-70SSIU2 DH-0750
0.046 1.79 0.137 18.8 - 0.67 1.85
DCA-70USJ / USI DB-0831
0.032 1.2 0.08 17.3 - 0.37 1.11
DCA-70USI2 DH-0750
0.046 1.79 0.137 18.8 - 0.67 1.85
DCA-85SSJU / SSJU2 DB-1001
0.021 1.33 0.08 17.3 - 0.32 0.96
DCA-85USJ /USJ2 DB-1001
0.021 1.33 0.08 17.3 - 0.32 0.96
DCA-85SSK / SSM DB-1001
0.021 1.33 0.08 17.3 - 0.32 0.96
DCA-100SSJU DB-1101
0.022 1.4 0.08 17.3 - 0.32 0.97
DCA-125SSK DB-1381
0.015 1.52 0.08 17.3 - 0.28 0.84
DCA-125SSM / SSM2 DB-1381
0.015 1.52 0.08 17.3 - 0.28 0.84
DCA-125SSJU DB-1381
0.015 1.52 0.08 17.3 - 0.28 0.84
DCA-125USJ / USI DB-1381
0.015 1.52 0.08 17.3 - 0.28 0.84
DCA-150SSK / SSK2 DB-1651
0.011 1.75 0.08 17.3 - 0.27 0.82
DCA-150SSM DB-1651
0.011 1.75 0.08 17.3 - 0.27 0.82
DCA-150SSJU / SSV DB-1651
0.011 1.75 0.08 17.3 - 0.27 0.82
DCA-150SSJU2 DB-1651
0.011 1.75 0.08 17.3 - 0.27 0.82
DCA-150USJ / USJ2 DB-1651
0.011 1.75 0.08 17.3 - 0.27 0.82
G
G
E
E
N
N
-
-
S
S
E
E
T
T
D
D
A
A
T
T
A
A
U1
to
X1
U2 to X2
V1
to Y1
V2
to Y2
W1
to Z1
W2 to Z2
Name
of Part
Wires
Location of Wires
Exciter Field J & K (connected to AVR)
Exciter Armature U V W (connected to rotating rectifier)
Main Field DC+ DC – (connected to rotating rectifier)
Main Armature 12 Load Leads (AC Outputs)
4 Open Delta Leads (connected to AVR – A,B,C,D)
Measuring between
AC
Ou
t
put leads
The chart below can be used as a reference guide for measuring resistance on the Gen-Set