HONDA GA-2.5H - Manual (Page 14)

PAGE 14 — GA-2.5H A.C. GENERATOR — OPERATION & PARTS MANUAL — REV. #4 (10/07/05)
GA-2.5H — GENERAL INFORMATION
Excitation System
The GA-2.5H generator uses a magnet attached to a
flywheel to produce AC voltage from a lamp coil beneath
the flywheel. As the magnetic 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.
Alternator
The alternator, a brushless revolving-field type, is
permanently aligned to the engine through rigid coupling.
Engine
This generator is powered by a 5.5 HP, air-cooled, 4-stroke
HONDA gasoline engine. Reference Table 2, for engine
specifications.
Before connecting this generators 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.
W W W W WARNING ARNING ARNING ARNING ARNING
GA-2.5H FAMILIARIZATION
Generator
The Multiquip GA-2.5H generator has been designed as a
portable dual purpose power source for 60 Hz (single phase)
lighting facilities, power tools, submersible pumps and other
industrial and construction machinery.
These generators are 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
generators to protect against damage. See Figures 2A and
2B for the basic controls and indicators for the GA-2.5H
generator.
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:
■ 120V twist-lock receptacle, single phase. (S/N 5496763
and above)
■ 120V GFCI single phase duplex output receptacle
■
20 amp main circuit breaker
■ AC Voltmeter
■ Ground Terminal (S/N 5496762 and below)