Multiquip PORTABLE DC WELDER/AC GENERATOR (GASOLINE ENGINE) GAW-135H - Manual (Page 16)

PAGE 16 — GAW-135H DC WELDER/AC GENERATOR — OPERATION MANUAL — REV. #0 (06/23/04)
GAW-135H — GENERAL INFORMATION
GAW-135H Familarization
General Inspection Prior to Operation
This generator/welder 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 MQ Model GAW-135H generator/welder 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/welder is powered by a Honda GX200VEN2,
5.5 HP, 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:
z (1) NEMA Duplex Receptacle (GFCI) 5-20R (120V,
20 Amp)
z One main 2-pole,15 Amp Circuit Breaker.
z Idle Control Switch
z Welding Terminal Lugs
z Ground Terminal
Circuit Breaker
To protect the generator from an overload, a 2-pole, 15 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 MQ generator/welder 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 Honda gasoline engine is designed
to meet every performance requirement of this generator.
Reference Table 1, for engine specifications.
Figure 2 shows the basic controls and indicators for the
MQ GAW-135H generator/welder.
NOTE
In keeping with Multiquip's
policy of constantly improving
its products, the specifications
quoted herein are subject to
change without prior notice.