Multiquip GBP5000H manual GDP-5000H General Information, Generator, Control Box, Excitation System

GDP-5000H — GENERAL INFORMATION

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.

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:

zThree 240V output receptacles (three phase).

zOne 120V output output receptacle (single phase).

zOne 120/240V output output receptacle (single phase).

zOne 120V output receptacle, GFIC (single phase).

zOne main 60 Hz (single phase) circuit breaker.

zOne main 180 Hz (three phase) circuit breaker.

zAC Voltmeter

zGroundTerminal

zFull Power Switch

zIdle Control Switch

zOperation 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:

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 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.

NOTE

In keeping with Multiquip's policy of constantly improving its products, the specifications quoted herein are subject to change without prior notice.

GDP-5000H A.C. GENERATOR — OPERATION AND PARTS MANUAL — REV. #2 (07/23/08) — PAGE 9