Multiquip manual GA-2.5H - GENERAL INFORMATION, GA-2.5H FAMILIARIZATION Generator, Control Box

GA-2.5H — GENERAL INFORMATION

WARNING

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.

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)

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:

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.

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.

PAGE 14 — GA-2.5H A.C. GENERATOR — OPERATION & PARTS MANUAL — REV. #5 (03/04/08)