MULTIQUIP DCA Series - Frequently Asked Questions

PAGE 70 — GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23)
FREQUENTLY ASKED QUESTIONS
Below is a list of typically asked questions received by the
MQ Power Service Department.
Question:
Why are the 50-amp twist-lock receptacles not working.
No output voltage?
Answer (DCA6~DCA150 Models):
The 50-amp twist-lock receptacles only work (voltage
output) when the voltage selector switch is placed in the
1Ø 240/120V position. When the voltage selector switch
is placed in any of the 3Ø positions, the receptacles have
no voltage output..
NOTICE
Main and auxilliary breakers must be in the CLOSED
position in order to obtain voltage at the 50 amp
CS-6369 twist-lock receptacles.
Answer (DCA180~DCA600 Models):
The 50-amp CS6369 twist-lock receptacles can be used
anytime during operation. Voltage can be adjusted using
the voltage control regulator located on the control panel.
CAUTION
NEVER attempt to place jumper plates on the voltage
change-over board while the generator is in operation.
There exists the possibility of electrocution, electrical
shock or burn, which can cause severe bodily harm
or even death!
Figure 81. 50-Amp CS-6369 Twist-Lock Receptacle
3 PHASE
480/277
3 PHASE
240/139
1 PHASE
240/120
PRESS TO LOCK
PRESS TO LOCK
3 PHASE
480/277
3 PHASE
240/139
1 PHASE
240/120
PRESS TO LOCK
PRESS TO LOCK
3 PHASE
480/277
3 PHASE
240/139
1 PHASE
240/120
PRESS TO LOCK
PRESS TO LOCK
VOLTAGE SELECTOR SWITCH
50 AMP CS-6369 TWIST-LOCK
RECEPTACLES OUTPUT
VOLTAGE AVAILABLE
NO NO YES
VOLTAGE CHANGE-OVER BD.
50 AMP CS-6369 TWIST-LOCK
RECEPTACLES OUTPUT
VOLTAGE AVAILABLE
YES YES
1
2
3
6
5
4
X
Y
Z
O
U
1
U
2
W
W
2
1
V
1
V
2
240 VAC
CONFIGURATION
X
U
1
U
2
JUMPER PLA
TES
1 AND 2
Y
V
1
V
2
JUMPER PLA
TES
3 AND 4
Z
JUMPER PLA
TES
5 AND 6
W
2
W
1
O
480 VAC
CONFIGURATION
AUX. POWER
50 AMP 240/139 VAC
CS-6369 TWIST-LOCK
RECEPTACLE
Y
X
W
SIX JUMPER
PLATES REQUIRED
YES