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Although individual units and models may vary slightly, the
normal voltage and frequency of the engine-generators
described in this book are approximately as follows, under
varying loads:
LOAD vs. OUTPUT
__________________________________________________________________________________________________________________
Generator Frequency
Voltage
Load
Speed
120V
Applied*
(RPM)
(Hz)
Recpt.
__________________________________________________________________________________________________________________
None
3750
62.5
126V
Half
3600
60.0
122V
Full
3540
59.0
119V
__________________________________________________________________________________________________________________
*Portion of plant’s rated output current.
The speed of the engine was carefully adjusted at the factory
so that the generator produces the proper voltage and
frequency. For normal usage, the speed setting should not
be changed. If the generator is being run continuously on a
very light load, it is often advisable to lower the operating
speed slightly. Whenever making any speed adjustments
check the unit with a voltmeter or tachometer and be sure the
speed is correct.
Lower voltage may damage both the generator and any load
connected to it. Running the engine at excessively high
speeds results in high voltage, which may significantly
shorten the life of appliances being used.
Output voltage should be checked periodically to ensure
continued proper operation of the generating plant and
appliances. If the generator is not equipped with a voltmeter,
it can be checked with a portable meter. Frequency can be
checked by using an electric clock with a sweep second
hand. Timed against a wrist watch or a stop watch the clock
should be correct /- 2 seconds per minute.
OPERATING YOUR GENERATOR
The engine-generators covered in this manual were designed
for portable use. DO NOT INSTALL OR OPERATE THIS
GENERATOR INDOORS. The unit should be stored in a
warm dry location. During a power outage, move the unit
outdoors to a flat dry location such as a driveway or sidewalk.
Allow the engine to warm up for two or three minutes before
applying any load. This will allow the engine to reach normal
operating temperature and oil to circulate throughout the
engine. A short warm-up time will permit the engine to work
more efficiently when the load is applied and will reduce the
wear in the engine, extending its life.
Receptacles have been provided to allow loads to be
connected to the generator. The loads should be added one
at a time. If a large motor is being started or multiple motors
are being started, they should be started individually and the
largest should be started first
Most electric tools and appliances will have the voltage and
amperage requirements on their individual nameplates.
When in doubt consult the manufacturer or a local electrician.
The nameplate amperage rating for electric motors can be
misleading. See “Starting Electric Motors” in Unit Capabilities
(page 2).
These engine generator sets are inherently self regulating
based on engine speed. The engine governor will
automatically adjust itself to the load. No harm to the
generator will result if it is operated with no load connected.
Proper utilization of the receptacles located on the control
panel is necessary to prevent damage to either the
receptacles or the generator. The generator is a limited
source of electrical power, therefore pay special attention
to the receptacle and generator ratings. The nameplate
rating can be obtained through a single receptacle as long
as the receptacle amperage rating is not exceeded.
HARD WIRING YOUR GENERATOR
Temporary Power
‘Hard Wiring’ this unit directly into a temporary construction
site electrical system is NOT A SIMPLE DO-IT-YOURSELF
JOB. For your safety all wiring must be done by a qualified
electrician and conform to the National Electric Code and
comply with all state and local codes and regulations.
Check with local authorities before proceeding.
WARNING: PERSONAL DANGER
A fully isolated, double pole double throw manual
transfer switch must be installed any time a generator is
being connected to an existing distribution system.
To connect these units directly to an un-powered, isolated
construction site TemPower panel, have your electrician
connect to the control panel using a 120/240 volt, four wire
twistlock plug (L14-30P). The use of locking receptacles
and locking plugs provides the convenience of quick
disconnect, for moving, while allowing non electrical workers
to safely reconnect the power. In addition they prevent the
plug from being accidentally removed by bumping or
vibration.
Home Standby
If the generator set is connected to existing (electrical)
wiring circuits it is permitted only through a fully isolated
manual transfer switch. The transfer switch prevents
damage to the generator and other circuit components if
main line power is restored while the generator is
connected. Installing a transfer switch also permits the use
of normal fusing.
Many homes and construction sites are wired for at least 60
to 100 Amp entrance service, much greater than the
capacity of these portable generators. When installing the
generator at these sites, a secondary emergency distribution
panel may have to be installed, such as the Emergency
Transfer/Service (ET/S) system available through your
Winco dealer. The emergency distribution panel must be
installed by a licensed electrician according to all applicable
codes. The electrician will move the critical circuits to be
powered during the outage to the emergency panel. Keep
in mind only a limited amount of amperage is available from
the generator set. Some circuit breakers may still have to
be turned off to prevent an overload on the generator during
the initial start up. See the nameplate on your generator for
the amperage capabilities of your unit.
CAUTION: EQUIPMENT DAMAGE
Failure to properly limit and balance the load applied to
the generator will cause the generator to produce low
voltage and may damage the engine generator set. It
may also cause severe damage to the loads connected
to the generator at that time. Improper loading of the
generator set constitutes abuse and will not be covered
by warranty.
