GDP-5000H A.C. GENERATOR — OPERATION AND PARTS MANUAL — REV. #2 (07/23/08) — PAGE 9
GDP-5000H — GENERAL INFORMATION
GDP-5000H FAMILIARIZATION
Generator
The Multiquip Model GDP-5000H 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. In
addition the Model GDP-5000H has been designed as a
power source for 180 Hz, 3-phase concrete vibrators.
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:
z
Three 240V output receptacles (three phase).
z
One 120V output output receptacle (single phase).
z
One 120/240V output output receptacle (single phase).
z
One 120V output receptacle, GFIC (single phase).
z
One main 60 Hz (single phase) circuit breaker.
z
One main 180 Hz (three phase) circuit breaker.
z
AC Voltmeter
z
Ground Terminal
z
Full Power Switch
z
Idle Control Switch
z
Operation Switch
Excitation System
The GDP-5000H-series generators use 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.
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 11) shows the basic controls and indicators
for the GDP-5000H 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.
