Generac 005411-0 Manual De Usuario

Most lighting, appliance, tool and motor loads indicate their 

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required watts on their nameplate or data plate. For light bulbs, 

simply note the wattage rating of the bulb.

If a load does not show its rated wattage, multiply that load’s 

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rated VOLTS times AMPS to obtain WATTS.

Induction type motors (such as those that run the vehicle’s 

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furnace fan, refrigerator, air conditioner, etc.) need about 2-1/2 

times more watts of power for starting than for running (for a 

few seconds during motor starting). Be sure to allow for this 

when connecting electrical loads to the generator. First, figure 

the watts needed to start electric motors in the system. To that 

figure, add the running wattages of other items that will be oper-

ated by the generator.

Do not apply heavy electrical loads for the first two or three 

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hours of operation.

This switch (Figure 2.2) has normally closed (N.C.) contacts that 

are held open by engine oil pressure during cranking and operat-

ing. Should oil pressure drop below a preset level, switch contacts 

close, and the engine automatically shuts down. The unit should 

not be restarted until oil is added.

This switch (Figure 2.2), which has normally open (N.O.) contacts, 

is mounted near the oil filter. The contacts close if the temperature 

should exceed approximately 270º F (132º C) for gasoline mod-

els.

The Controller Circuit Board houses a field boost diode and resistor 

that are not part of the automatic choke circuit. These two compo-

nents are part of a “field boost” circuit (Figure 2.3). During engine 

cranking only, a positive DC (battery) voltage is delivered through 

a diode, resistor, brushes, slip rings, and the generator rotor. 

Application of this voltage to the rotor “flashes the field” whenever 

it is started. Flashing of the field each time the generator starts 

makes sure that a sufficiently strong magnetic field is available to 

produce “pickup” voltage in the stator windings.

A solid-state voltage regulator (Figure 2.4) controls the generator’s 

AC output voltage. This regulator supplies an excitation current to 

the rotor. By regulating the rotor’s excitation current, the strength 

of its magnetic field is regulated and, in turn, the voltage delivered 

to connected electrical loads is controlled. When the AC frequency 

is 60 Hertz, voltage is regulated at 125 to 120 volts.

Operation