
Operation
28
MMG25I-35D-45I-55DF4 Operating Manual
36949 B
Figure 3-6. Voltage Selector Switch Connections
VOLTAGE REGULATION
The electronic voltage regulator controls the output of the generator by regulating the current into the exciter field.
The regulator has four screwdriver adjustable potentiometers that may be adjusted for U/F dip, under frequency
protention (U/F), stability, and voltage. The voltage regulator on the unit is adjusted before shipment from the factory.
Contact Generac Mobile Products for additional information before attempting to adjust the voltage regulator.
Note:
For units equipped with a Marathon D digital voltage regulator, please refer to the Marathon operating
manual provided with the unit.
CUSTOMER CONVENIENCE RECEPTACLES
The unit is equipped with five receptacles. The large receptacles are 240/120VAC twist-lock receptacles rated at
50A each. The smaller duplex receptacles are 120VAC rated at 20A each with ground fault circuit interrupt (GFCI)
protection. These receptacles are not routed through the main circuit breaker. Each receptacle has its own circuit
breaker, located above the connection lugs. Each breaker is sized to the maximum rating of the corresponding
receptacle.
L1-L2 = -
L1-N = 120V
N =
L2-L3 = -
L2-N = -
L3-L1 = 240V
L3-N = 120V
VOLTAGES AT RECEPTACLES
120/240V 1-PHASE
Switch styles vary by model.
RECEPTACLE
L-L
L-N
GFCI
-
120V
GFCI w/Buck
-
120V
Twist-locks 240V
120V
120/
208V
120/
240V
00087