Multiquip GA4.5RA GA-4.5R/GA-4.5RA - GENERAL INFORMATION, GA-4.5R/GA-4.5RA Familarization, Engine

GA-4.5R/GA-4.5RA — GENERAL INFORMATION

DANGER - ELECTRICAL SYSTEM HAZARDS

Before connecting this generator to any building’s electrical system, a licensed electrician must install an isolation (transfer) switch. Serious damage to the building’s electrical system may occur without this transfer switch.

GA-4.5R/GA-4.5RA 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 MQ Model GA-4.5R andGA-4.5RA generators have 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.

These generators are powered by a 9.0 HP ROBIN air-cooled gasoline engine. The alternator, a brushless revolving-field type, is permanently aligned to the engine through rigid coupling.

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 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), GA-4.5RA has two.

■NEMA L5-20R, twist-lock receptacle, (125V, 20 amps)

■NEMA L5-30R, twist-lock receptacle, (125V, 30 amps)

■NEMA L14-20R , twist-lock receptacle, (125/250V, 20 amps)

■Circuit Breaker, 2-pole, 15 amps

■AC Voltmeter

■Operation Switch

■Idle Control Switch

■Full Power Switch

Excitation System

The GA-4.5R/GA-4.5RA 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:

zExcitation (diode 1)

zBattery (diode 2)

zSlow 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.

Figures 2A through 2E show the basic controls and indicators for the GA-4.5R/ GA-4.5RA generators.

In keeping with Multiquip's policy of constantly

NOTEimproving its products, the specifications quoted herein

are subject to change without prior notice.

GA-4.5R/GA-4.5RA A.C. GENERATOR — OPERATION & PARTS MANUAL — REV. #1 (11/27/06) — PAGE 13