General Information

GENERATOR

This generator (Figure 3) is a high quality portable (requires a trailer for transport) power source for telecom sites, lighting facilities, power tools, submersible pumps and other industrial and construction machinery.

ENGINE OPERATING PANEL

The “Engine Operating Panel” is provided with the following:

Tachometer

Water Temperature Gauge

Warning Lamp

Fuel Leak Detected Alam Lamp

Pre-Heat Lamp

Oil Pressure Gauge

Charging Ammeter Gauge

Fuel Level Gauge

Panel Light/Panel Light Switch

ECU Controller

Engine Speed Switch

GENERATOR CONTROL PANEL

The “Generator Control Panel” is provided with the following:

Frequency Meter (Hz)

AC Ammeter (Amps)

AC Voltmeter (Volts)

Ammeter Change-Over Switch

Voltmeter Change-Over Switch

Voltage Regulator

3-Pole, 110 amp Main Circuit Breaker

“Control Box” (located behind the Gen. Control Panel)

•Automatic Voltage Regulator

•Current Transformer

•Over-Current Relay

•Starter Relay

•Voltage Selector Switch

OUTPUT TERMINAL PANEL

The “Output Terminal Panel” is provided with the following:

Three 120/240V output receptacles (CS-6369), 50A

Three auxiliary circuit breakers, 50A

Two 120V output receptacles (GFCI), 20A

Two GFCI circuit breakers, 20A

Five output terminal lugs (3Ø power)

OPEN DELTA EXCITATION SYSTEM

This generator is equipped with the state of the art “Open- Delta” excitation system. The open delta system consist of an electrically independent winding wound among stationary windings of the AC output section.

There are four connections of the open delta A, B, C and D. During steady state loads, the power from the voltage regulator is supplied from the parallel connections of A to B, A to D, and C to D. These three phases of the voltage input to the voltage regulator are then rectiﬁ ed and are the excitation current for the exciter section.

When a heavy load, such as a motor starting or a short circuit occurs, the automatic voltage regulator (AVR) switches the conﬁ guration of the open delta to the series connection of B to C. This has the effect of adding the voltages of each phase to provide higher excitation to the exciter section and thus better voltage response during the application of heavy loads.

The connections of the AVR to the AC output windings are for sensing only. No power is required from these windings. The open-delta design provides virtually unlimited excitation current, offering maximum motor starting capabilities. The excitation does not have a “ﬁxed ceiling” and responds according the demands of the required load.

ENGINE

This generator unit incorporates an ISUZU BU-4JJ1T diesel engine.This engine is designed to meet every performance requirement for the generator. Reference Table 2 for engine speciﬁ cations.

In keeping with MQ Power’s policy of constantly improving its products, the speciﬁ cations quoted herein are subject to change without prior notice.

ELECTRIC GOVERNOR SYSTEM

The electric governor system controls the RPMs of the engine. When the engine demand increases or decreases, the governor system regulates the frequency variation to ±.25%.

EXTENSION CABLES

When electric power is to be provided to various tools or loads at some distance from the generator, extension cords are normally used. Cables should be sized to allow for distance in length and amperage so that the voltage drop between the generator and point of use (load) is held to a minimum. Use the cable selection chart (Table 6) as a guide for selecting proper extension cable size.

PAGE 16 — DCA45USI2 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)

DCA45USI2 specifications

The Multiquip DCA45USI2 is a robust and versatile generator that caters to a wide array of power needs across various applications. Designed for both commercial and industrial use, this generator stands out due to its powerful output, durability, and advanced technology.

The DCA45USI2 offers a maximum output of 45 kVA, making it suitable for both demanding construction sites and as a backup power source for critical equipment in emergencies. It operates with a reliable Yanmar diesel engine, known for its fuel efficiency and longevity, ensuring that users can count on consistent performance over extended periods. The unit is built to provide high-quality electrical output, ensuring that sensitive equipment is protected from surges and fluctuations.

One of the standout features of the DCA45USI2 is its sound attenuation technology. Enclosed within a sturdy yet compact frame, this generator is designed to minimize noise levels, making it an ideal choice for urban environments or noise-sensitive applications. The insulation materials used are specifically chosen to absorb sound waves while still allowing for efficient ventilation.

In terms of ease of use, the DCA45USI2 is equipped with a user-friendly control panel that provides comprehensive monitoring capabilities. This includes advanced protective features, such as low oil pressure shutdown, high-temperature shutdown, and overload protection, ensuring that the generator operates safely at all times. The digital display offers real-time information on vital operating parameters, enabling operators to swiftly respond to any issues that may arise.

Another key characteristic of the DCA45USI2 is its portability. Weighing in at a manageable level for its size and capacity, it features heavy-duty wheels and a lifting eye which allow for easy transportation across job sites. This adaptability is crucial for rental companies and contractors who require a reliable source of power on-the-go.

Overall, the Multiquip DCA45USI2 embodies a blend of power, efficiency, and convenience. Its advanced engineering and thoughtful design cater to the needs of various industries, making it a preferred choice among professionals who demand reliability and performance from their equipment. Whether for construction, emergency response, or temporary power solutions, the DCA45USI2 proves to be a formidable ally in getting the job done efficiently and effectively.