Multiquip dca25USI2 manual General Information

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General Information

Generator

This MQ Power 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

„„Pre-Heat Lamp

„„Oil Pressure Gauge

„„Charging Ammeter Gauge

„„Fuel Level Gauge

„„Panel Light/Panel Light Switch

„„Oil Pressure Alarm Lamp

„„Water Temperature Alarm Lamp

„„Fuel Filter Water Level Alarm Lamp

„„Fuel Leak Detected 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, 6 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 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.

Engine

This generator unit incorporates an ISUZU BV-4LE2 diesel engine.This engine is designed to meet every performance requirement for the generator. Reference Table 2 for engine specifications.

In keeping with MQ Power’s policy of constantly improving its products, the specifications 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 — DCA25Usi2 60 hz Generator • operation and parts manual — rev. #0 (02/14/14)

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Contents Model dca25USI2 Proposition 65 warning Reporting Safety Defects AdministratorTable of Contents DCA25USI2 60 Hz GeneratorChoose from three easy options Safety Information SaFetY messagesGeneral saFetY Generator SafetyRestricted. If the air fl ow is If operating in speed ranges above the maximum allowable„ never use fuel as a cleaning agent FUel saFetYFrom fuel vapors or if fuel is spilled on a hot engine EleCtriCal saFetY Power Cord/Cable safetyGrounding Safety BatterY saFetYEnvironmental saFetY/DeCommissioning Emissions inFormationEmission Control label Label must remain with the engine for its entire lifeSpecifications DCA25USI2Dimensions DimensionsInstallation Typical Generator Grounding ApplicationOutdoor Installation Indoor InstallationMounting Generator GroundingGeneral Information Major Components Item noGenerator Control Panel Generator Control PanelEngine Operating Panel Fuel Gauge Indicates amount of diesel fuel availableOutput Terminal Panel Familiarization Output Terminal FamiliarizationTerminal legs O and Ground are considered bonded grounds Output Terminal Panel is provided with the followingRemoving the Plastic Face Plate Hard Wire Hookup Panel VAC Gfci ReceptaclesConnecting Loads Over Current RelayThree Phase Load Single Phase LoadLoad Application Generator Outputs How to Read the ac ammeter and ac voltage gauges Generator OUTPUTS/gauge readingAC Voltmeter Gauge Reading AC Ammeter Gauge ReadingOutput Terminal Panel Connections Uvwo Terminal Output Voltages3Ø-240/139 Uvwo Terminal Output Voltages 3Ø-208V/1Ø-120V Uvwo Terminal Output Voltages3Ø-480/277V Uvwo Terminal Output Voltages 1Ø-240/120V Uvwo Terminal Output VoltagesInspection/SETUP Circuit BreakersLubrication Oil Fuel CheckRefueling Procedure Only use #2 diesel fuel when refuelingCleaning the Radiator Air Cleaner Fan Belt TensionCoolant Antifreeze/Summer Coolant/ Water Operation in Freezing WeatherBattery Battery Cable InstallationWiring AlternatorGenerator START-UP Procedure Before StartingStarting Engine’s exhaust contains harmful emissionsCoolant Temperature Gauge Generator SHUT-DOWN Procedures Normal Shutdown ProcedureEmergency Shutdown Procedure Never stop the engine suddenly except in an emergencyGeneral Inspection Air Cleaner MaintenanceAir Cleaner with Dust Indicator Cleaning Inside the Fuel Tank Fuel AdditionRemoving Water from the Fuel Tank Fuel Tank InspectionRadiator Cleaning Check Oil LevelReplacing Oil Filter Flushing Out Radiator and Replacing CoolantTrailer Maintenance Trailer MaintenanceCoupler Type of hitch used on the trailer for towing Brake Adjustment BrakesHydraulic Surge Brakes ActuatorTire Wear/Inflation Tires/Wheels/Lug NutsSuspension Lug Nut Torque Requirements Never use an pneumatic air gun to tighten wheel lug nutsTrailer Wiring Diagram Trailer/Towing Vehicle Wiring DiagramGenerator Wiring Diagram Generator Wiring DiagramEngine Wiring Diagram Engine Wiring DiagramTroubleshooting Generator Explanation of Code in Remarks Column Suggested Spare Parts To 3 unitsGenerator Assy B1110200602 79610250040601822630 8001070003Control box Assy M1213001002 M12130010120601808820 0601807520Control box Assy M1223000603 M12230006130601807641 0601808985 AC Meter ~50A/100A5A1 0601801040Engine and Radiator Assy M1923200124 89723093902944566410 M1305200304Engine and Radiator Assy 0603300285 06033002860605511395 0605511399Output Terminal Assy 12A 11B 11A 13B 13C 13A 24A 25AM1230700003 M9220000004M9220000104 0039308000Battery Assy 0602220185 M9310500014M9103000304 0602220920Muffler Assy M1330000512 M1333200304M1333300204 M1333003013Fuel Tank Assy M1365000302 06055050700605501071 0605516090Enclosure Assy 72A 54A 56A 59A 56B 58A 52AM1413003402 M1419300504M1415100202 0603306797Enclosure Assy 0207006000 M144330220334A M1493305104 M1443400103Enclosure Assy 52A M1493410104 M145300490353A M1493409904 53B M1495501004Rubber Seals Assy REMArks Nameplate and Decals Assy M1510300902 M11030090M1510301002 M11030100Terms and Conditions of Sale Parts Freight PolicyPage HERE’S HOW to GET Help

dca25USI2 specifications

The Multiquip DCA25USI2 is a powerful and versatile portable generator designed for a range of applications in construction, events, and emergency power supply. This model is particularly noted for its durability and reliability, making it an excellent choice for both professionals and DIY enthusiasts.

At the heart of the DCA25USI2 is a robust 25 kW output, giving users plenty of power to run multiple tools, equipment, or systems simultaneously. This generator operates on a powerful water-cooled diesel engine, which not only enhances fuel efficiency but also extends the lifecycle of the machine compared to traditional gas-powered generators. The use of diesel fuel contributes to lower operational costs and makes it suitable for longer usage periods, particularly in remote locations.

One of the standout features of the DCA25USI2 is its compact design. Despite its high power output, this generator maintains a relatively small footprint, allowing for easy transportation and storage. Weighing around 1,800 pounds, it is fitted with a robust frame that provides durability while facilitating easy placement at job sites or outdoor events.

The generator is equipped with advanced noise reduction technology, ensuring that it operates quietly, which is crucial when working in residential areas or noise-sensitive environments. The sound-dampening enclosure significantly lowers operating noise levels, enhancing the overall user experience.

In terms of electrical output, the DCA25USI2 offers multiple options, including both single-phase and three-phase connections. This versatility allows users to power a variety of applications without needing additional adaptors. Moreover, the generator’s heavy-duty alternator ensures stable power delivery, protecting sensitive electronic devices from voltage spikes.

Another key characteristic of the DCA25USI2 is its user-friendly control panel, which features intuitive gauges and circuit breakers for easy management of power distribution. The panel includes a digital hour meter, allowing operators to track usage and plan for maintenance efficiently.

Safety features are also a priority with the DCA25USI2, including automatic shutdown capabilities to protect the engine against low oil levels and overheating. This thoughtful design helps to ensure both the performance and longevity of the generator.

In summary, the Multiquip DCA25USI2 stands out for its powerful output, efficient diesel engine, compact design, and advanced features, making it a top choice for anyone in need of reliable portable power. Whether for construction, events, or emergency backup, this generator is engineered to deliver exceptional performance and peace of mind.
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