Voltage Regulation; Customer Convenience Receptacles - Generac Power Systems MAGNUM MMG25IF4 Operating Manual

Operation
120/
208V
120/
240V
Switch styles vary by model.

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 DVR2000E+ 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.
28
120/240V 1-PHASE
Figure 3-6. Voltage Selector Switch Connections
MMG25I-35D-45I-55DF4 Operating Manual
L1-L2 = - L1-N = 120V
L2-L3 = - L2-N =
L3-L1 = 240V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE
GFCI
GFCI w/Buck
Twist-locks
N =
-
L-L L-N
- 120V
- 120V
240V 120V
00087
36949 B