VOLTAGE SELECTOR SWITCH
The voltage selector switch is located behind the lug door, underneath the engine controller panel. The selector
switch is a three position switch that mechanically changes the connections between the generator output leads and
the connection lugs. Voltage ranges are selected by rotating the handle on the switch to the desired voltage.
NOTICE
Never change the voltage selector switch while the engine is running!
This will cause sever arcing and damage to the switch and generator windings.
The voltage switch is equipped with a locking mechanism. Once the proper voltage has been selected, push the red
latch on the inside of the phase 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 convenience
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 outlets is 208/120
Volts.
21
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 =
T4
T7
T10
T1
L1
L2
T8
T2
T9
T3
T6
T11
L3
T5
T12
N
L-N
L-L
L1 - L2 = 208V L1 - N = 120V
L2 - L3 = 208V L2 - N = 120V
L3 - L1 = 208V L3 - N = 120V
N =
T10
T7
T6
T8
T12 T2
T11
T3
T4
T1
T5
T9
L3
N
L1
120V
120V
240V
L1 - L3 = 240V L2 - N = -------
L1 - N = 120V L3 - N = 120V
208
120
240
120
480
277
208
120
480
277
208
120
240
120
480/277V
3-PHASE
208/120V
3-PHASE
240/120V
1-PHASE
