Voltage Selector Switch - Magnum MMG 125 Operating Manual

VOLTAGE SELECTOR SWITCH (MMG 125-155-180)
The voltage selector switch is located on a panel attached to the generator behind the door located next to the fuel
tank filler. The selector switch is a three position switch that mechanically changes the connections between the
generator output leads and the connection lugs on the main control panel. Voltage ranges are selected by rotating
the handle on the switch to the desired voltage.
NEVER attempt to change the voltage selector switch while the engine is running!
This will cause severe arcing and damage to the switch and generator windings.
208
120
480/277V
480
277
3-PHASE
208
120
208/120V
480
277
3-PHASE
208
120
240/120V
1-PHASE
The voltage selector switch is equipped with a locking mechanism. Once the proper voltage has been selected,
push the red latch on the inside of the switch handle up and insert a padlock through the handle. By locking the
handle in place you will prevent unauthorized personnel from changing the switch settings.
Note: When the voltage selector switch is in position for 480/277V 3Ø, voltage at the two GFCI duplex conve-
nience outlets is 139 Volts and the voltage at the three twist-lock outlets is 240/139 Volts. When the voltage
selector switch is in position for 208/120V 3Ø, voltage at the three twist-lock outlets and the two GFCI duplex
convenience outlets is 208/120 Volts.
30
NOTICE
L1
T1
T4
T7
T10
N
T12 T11
T9
T6
T3
L3
L1
T7
T1
240
120 T4
T10
N
T5
T12
T9
T6
T11
L3 T3
L-N
T6
T8
T12 T2
T3
L3 T9
240
120
120V
L1 - L2 = 480V L1 - N = 277V
L2 - L3 = 480V L2 - N = 277V
L3 - L1 = 480V L3 - N = 277V
N =
L-L
T8
T5
T2
L2
L-N
L1 - L2 = 208V L1 - N = 120V
L2 - L3 = 208V L2 - N = 120V
L3 - L1 = 208V L3 - N = 120V
N =
L-L
T2
T8
L2
T11
T10
T7
N
L1
T5
T4 T1
120V
240V
L1 - L3 = 240V L2 - N = -------
L1 - N = 120V L3 - N = 120V