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GA-9.7 HZ A.C. GENERATOR — PARTS & OPERATION MANUAL — REV. #2 (03/05/01) — PAGE 9
GA-9.7 HZ — GENERAL INFORMATION
GA-9.7 HZ FAMILIARIZATION
Generator
The Multiquip Model GA-9.7 HZ 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 HONDA 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
box
. To reduce vibration caused by the engine, the control
box is also placed on rubber isolators.
Control Box
The control box is provided with the following:
l
Three 120/240V output receptacles (single phase).
l
Two 120 V output GFI receptacles (single phase).,
l
Five circuit breakers, one for each receptacle.
l
One 240 V, 60 Hz main circuit breaker.
l
AC Voltmeter.
l
Idle Control Switch.
l
Full Power Switch.
l
Operation Switch.
Excitation System
All GA-series generators use 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:
l
Excitation (diode 1)
l
Battery (diode 2)
l
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 HONDA gasoline engine is designed
to meet every performance requirement of this generator.
Reference Table 1, page 8 for engine specifications.
Figure 1 (page 10) shows the basic controls and indicators
for the GA-9.7 HZ generator.
WARNING:
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.
NOTE
In keeping with Multiquip's policy of
constantly improving its products, the
specifications quoted herein are subject
to change without prior notice.