
31
CAUTION
The two120V GFCI receptacles should not be used in the 480/277 and 600/348 voltage
settings and the three 240V twist-lock receptacles should not be used in the 600/348 voltage
setting as the voltage will be higher and equipment damage could result.
4-POSITION VOLTAGE SELECTOR SWITCH OPTION
The voltage selector switches are located on a panel attached to the generator behind the door located next to the
fuel tank filler. One selector switch is a four position switch that changes the connections between the generator
output leads and the connection lugs on the main control panel. The other selector switch is a two position switch
that changes the resistance to the voltage regulator to set the generator output voltage to 480V or 600V. Voltage
ranges are selected by rotating the handles on the switches to the desired voltage.
NEVER CHANGE THE VOLTAGE SELECTOR SWITCH WHILE THE ENGINE IS RUN-
NING!
This will cause severe arcing and damage to the switches and generator windings.
The four position selector switch must be at 480/277V when the two position selector switch
is at or switching to 600V.
Unit
Configuration
Switch Configuration
Voltage Configuration
348/600V
3-Phase
277/480V
3-Phase
600V
≤ 480V
OR
T1
L1
T4
T7
T10
N
T2
L2
T8
T5
T9
T6
T3
L3
T11
T12
L-N
L-L
L1 - L2 = 600V L1 - N = 348V
L2 - L3 = 600V L2 - N = 348V
L3 - L1 = 600V L3 - N = 348V
N =
600V
≤ 480V
OR
T1
L1
T4
T7
T10
N
T2
L2
T8
T5
T9
T6
T3
L3
T11
T12
L-N
L-L
L1 - L2 = 480V L1 - N = 277V
L2 - L3 = 480V L2 - N = 277V
L3 - L1 = 480V L3 - N = 277V
N =
Summary of Contents for MMG75CAN6
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