DCA-25SSIU2 (50 HZ)— GENERAL INFORMATION

DCA-25SSIU2 (50 HZ) Series Familiarization

Generator

The MQ Power Model DCA-25SSIU2 (50 Hz) is a 16 kW generator (Figure 5) that is designed as 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

■Water Temperature Alarm Lamp

■Oil Pressure Gauge

■Oil Pressure Alarm Lamp

■Charging Ammeter Gauge

■Fuel Level Gauge

■Pre-heat Lamp

■Panel Light/Panel Light Switch

■Ignition Switch

■Fuel Filter Water Level Alarm Lamp

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, 60 amp Main Circuit Breaker

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

■Automatic Voltage Regulator

■Current Transformer

■Over-Current Relay

■Voltage Rectifier

■Starter Relay

■Voltage Selector Switch

Output Terminal Panel

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

■Three 100/200V output receptacles (CS-6369), 50A

■Three auxiliary circuit breakers, 50A

■Two 100V output receptacles (GFCI), 20A

■Two GFCI circuit breakers, 20A

■Five output terminal lugs (3Ø power)

■Battery Charger (Optional)

■Water Heater (Optional)

Open Delta Excitation System

The DCA-25SSIU2 (50 Hz)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 rectified 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 configuration 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.

PAGE 18 — DCA-25SSIU2 (50 HZ)— OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)

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Multiquip operation manual DCA-25SSIU2 50 HZ- General Information
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DCA-25SSIU2 specifications

The Multiquip DCA-25SSIU2 is a versatile and powerful diesel generator, designed to meet the needs of various industries while providing a reliable source of power. This model is particularly popular in construction, event management, and emergency backup supply applications. With its robust build and advanced features, the DCA-25SSIU2 stands out as a top choice for professionals seeking durability and efficiency.

One of the significant features of the DCA-25SSIU2 is its impressive power output. The generator delivers a continuous output of 25 kVA, making it suitable for powering heavy machinery, tools, and equipment. This model is equipped with a turbocharged, liquid-cooled YANMAR engine, known for its performance and fuel efficiency. The engine operates quietly, ensuring minimal noise pollution in sensitive environments.

Built to withstand harsh conditions, the DCA-25SSIU2 is housed in a sturdy steel frame enclosure. The design not only protects the generator from the elements but also reduces noise levels. The enclosure features a weather-resistant finish, making it ideal for both indoor and outdoor applications. Additionally, the unit's compact size allows for easy transportation and storage, which is an essential consideration for contractors on the go.

The DCA-25SSIU2 incorporates advanced technology to enhance performance and user experience. It features a digital control panel, offering intuitive monitoring of generator status, fuel consumption, and operational hours. Automatic voltage regulation ensures a stable output, protecting connected devices from voltage fluctuations.

Fuel efficiency is another highlight of this generator. The DCA-25SSIU2 operates on diesel, which is not only readily available but also provides a longer run time compared to gasoline generators. The large fuel tank capacity allows for extended periods of operation without frequent refueling.

Safety is a critical aspect of the DCA-25SSIU2. The generator is equipped with safety features such as low oil shut-off, overload protection, and a heavy-duty frame for stability. These elements ensure that the generator operates safely and reliably, even in demanding situations.

In conclusion, the Multiquip DCA-25SSIU2 diesel generator combines power, efficiency, and ruggedness. Its blend of advanced features, fuel efficiency, and safety make it an excellent choice for a wide range of applications. Whether for construction projects, outdoor events, or emergency power needs, the DCA-25SSIU2 stands as a testament to Multiquip's commitment to quality and innovation in the generator market.
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