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PAGE 16 — STOW G-2.9R A.C. GENERATOR— OPERATION & PARTS MANUAL — REV. #1 (10/28/04)
STOW G-2.9R — GENERAL INFORMATION
STOW G-2.9R Familarization
General Inspection Prior to Operation
This generator has been thoroughly inspected and accepted
prior to shipment from the factory. However, be sure to check
for damaged parts or components, or loose nuts and bolts,
which could have become disloged in transit.
The
STOW Model G-2.9R
generator has been designed as
a portable lightweight power source for 60 Hz (single-phase)
vibrators, lighting facilities, power tools, submersible pumps
and other industrial and construction machinery.
This generator is powered by a 5.7 HP ROBIN air-cooled
gasoline engine. The alternator, a brushless revolving-field
type, is permanently aligned to the engine through rigid
coupling.
The generator is mounted on rubber vibration isolators that
have a steel base backplate which is attached to the
protective steel pipe carrying frame. The protective carrying
frame is made of steel tubing and fully wraps around the
generator to protect against damage.
This portable generator is supplied with a electrical
control
panel
. The control panel includes items as listed below.
Control Panel
The generator control panel has the following componets:
■
NEMA 5-20R GFCI duplex receptacle (120V, 20 amps)
■
NEMA L5-20R, twist-lock receptacle (120V, 20 amps), (S/N
5497957 and above)
■
Circuit breaker, single-pole, 22 amps
■
AC Voltmeter
■
Operation Switch (S/N 5497956 and below)
■
Engine ON/OFF Switch (S/N 5497957 and above)
■
Oil Alarm Lamp (S/N 5497956 and below)
■
GFCI Ground Terminal (S/N 5497956 and below)
■
Ground Terminal
Circuit Breaker
To protect the generator from an overload,
a single-pole, 22
amp circuit breaker is provided on the control panel. Make
sure to switch this circuit breaker to the "OFF" position prior
to starting the engine.
Excitation System
The STOW G-2.9R generator uses a magnet attached to a
flywheel to produce AC voltage from a lamp coil beneath
the flywheel. As the magnet passes the coil it produces
approximately 19-22 AC volts.
This voltage (19-22 VAC) is then sent to the control box that
contains three rectifying diodes:
z
Excitation (diode 1)
z
Battery (diode 2)
z
Slow Down (diode 3)
The AC voltage will pass through the excitation diode that
converts the voltage to DC power.
This DC power is then sent to the excitation windings housed
within the main windings commonly called the "stator".
This voltage is then transferred into the rotor through
induction. The rotor contains two diodes within it which rectify
the DC voltage and send it out through the main windings,
as AC voltage.
Engine
The four-cycle air-cooled
ROBIN
gasoline engine is designed
to meet every performance requirement of this generator.
Reference Table 1, for engine specifications.
Figure 3 shows the basic controls and indicators for the
STOW G-2.9R generator.
NOTE
In keeping with
STOW's
policy
of constantly improving its
products, the specifications
quoted herein are subject to
change without prior notice.
Before connecting this generator to any building’s
electrical system, a licensed electrician must install an
isolation
(transfer) switch.
Serious injury or death may result without this transfer
switch. Please note that the transfer switch can only be
configured with generators that have electric start
capability. Transfer switch should not be used with recoil-
start type generators.
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