Magnum MMG 230, Operating Manual, Page: 32 / 48

32
CHANGING OUTPUT VOLTAGE (MMG 230 ONLY)
The output voltage can be changed by moving the shorting (link) board in the generator reconnect box. The
reconnect box is located on the top of the generator. Before attempting to change the output voltage, shut the
generator down and make sure that the main circuit breaker and the control power switch are in the off “O” posi-
tion.
To receive 480/277 V 3Ø voltage at the connection lugs, the shorting (link) board must be attached in the lower
position as shown in the illustration. For 208/120 3Ø voltage, the shorting (link) board must be in the upper
position as shown in the illustration. If the board needs to be changed from one setting to the other, remove all of
the 1/2” nuts that hold the shorting (link) board down and move it to the new position. Replace all of the hardware
and tighten it to 25 ft-lbs. of torque.
Reinstall the reconnect box door and start the generator by following the instructions in the GENERATOR START-
UP section, beginning on page 20.
Never attempt to change the voltage while the engine is running.
Lethal voltage may be present at the connection lugs on the reconnect board.
WARNING
LINK BOARD ATTACHED IN
480 VOLT 3Ø POSITION
L1
L-N
L2
N
L3
L-L
T1
T9
T11
T7
T10
T4
T12
T8
T3
T6
T2
T5
L1
L-N
L2
N
L3
L-L
T1
T9
T11
T7
T10 T4
T12
T8 T3
T6
T2
T5
LINK BOARD ATTACHED IN
208 VOLT 3Ø POSITION
REMOVE ALL
1/2” NUTS