Multiquip DCA300SSC manual General Information

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GENERAL INFORMATION

GENERATOR

The MQ Power Model DCA300SSC is a generator (Figure

3)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

Emergency Stop Switch

Water Temperature Gauge

Oil Pressure Gauge

Charging Ammeter Gauge

Fuel Level Gauge Pre-Heat Lamp

Engine Speed Switch Battery Switch

Engine Alarm Lamps (5)

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

Panel Light/Panel Light Switch

3-Pole, 800 amp Main Circuit Breaker

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

•Automatic Voltage Regulator

•Current Transformer

•Over-Current Relay

•Starter Relay

•Engine Controller (Computer Controlled)

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

Eight output terminal lugs (3Ø power)

Battery Charger (Optional)

Water Heater (Optional)

OPEN DELTA EXCITATION SYSTEM

The DCA300SSC 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

The DCA300SSC is powered by a 6 cylinder, 4-cycle water cooled, direct injection, turbocharged, charge air cooled Cummins QSL9-G3diesel 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 — DCA300SSC GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (06/25/09)

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Contents Model DCA300SSC This Manual Must Accompany the Equipment AT ALL TimesProposition 65 Warning Reporting Safety Defects NhtsaTable of Contents DCA300SSCParts Ordering Procedures Ordering parts has never been easierSafety Information Safety MessagesGenerator Safety General Safety Always know the location of the nearest Engine Safety Before servicing equipmentFuel Safety Towing Safety Never use fuel as a cleaning agent From fuel vapors or if fuel is spilled on a hot engineElectrical Safety Grounding SafetyPower Cord/Cable Safety Device. All installations should beBattery Safety Environmental SafetySpecifications Cummins QSL9-G3Dimensions DimensionsInstallation Typical Generator Grounding ApplicationOutdoor Installation Indoor InstallationMounting Generator GroundingGeneral Information Major Components Item noGenerator Control Panel Pilot Lamp Indicates the system is runningOwing from the U,V, and W Output Terminal Lugs to the load Air Filter Alarm When the air fi lter Engine Operating PanelPage Output Terminal Familiarization Output Terminal Panel FamiliarizationTerminal legs O and Ground are considered bonded grounds VAC Gfci Receptacles 240V Twist-Lock Auxiliary ReceptaclesConnecting Loads Over Current RelayThree Phase Load Single Phase LoadLoad Application Generator Outputs Generator Output VoltagesVoltage Change-Over Board Maximum AmpsHOW to Read the AC Ammeter and AC Voltage Gauges Generator OUTPUTS/GAUGE ReadingAC Ammeter Gauge Reading AC Voltmeter Gauge ReadingOutput Terminal Panel Connections Uvwo Terminal Output Voltages3Ø-240V Uvwo Terminal Output Voltages 1Ø-240V Uvwo Terminal Output Voltages1Ø-480V Uvwo Terminal Output Voltages 3Ø-480V Uvwo Terminal Output Voltages1Ø-277V Uvwo Terminal Output Voltages INSPECTION/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 Manual Place the engine speed switch in the LOW down positionBefore Starting Starting ManualFrequency Meter Generator START-UP Procedure Auto Mode Starting Auto ModeBefore connecting this generator to any Place the engine speed switch in the High positionGenerator 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 Fuel Tank Inspection Fuel AdditionAIR Removal Radiator Cleaning Check OIL LevelReplacing Oil Filter Flushing OUT Radiator and Replacing CoolantBattery Charger and Jacket Water Heater Power Connections Trailer 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 DiagramPage Troubleshooting Generator Troubleshooting Engine Controller Clean/repair radiator grillAdjust governor actuator Adjust governor controllerTroubleshooting Diagnostic Lamp Method of OperationPage Sample Parts List Explanation of Code in Remarks ColumnSuggested Spare Parts To 3 unitsGenerator Assy 0601842402 06018232820018205020 4A# 0040005000Generator Assy C3154400003 0017106015C3164600103 0010310030Control BOX Assy M5213000002 06018096590027106015 0601807513Control BOX Assy 38 a 0601810244 06018316700601831205 0601830746Engine and Radiator Assy C2923200204 06020152443288497 0602046638Engine and Radiator Assy 0603306395 06020210700269200800 0602010220Engine Operating Panel Assy C2351101903 00171060200207006000 0602101000Output Terminal Assy C2231700403 C02775000040801830904 0039320000Battery Assy 0165614551 145G51C9109100604 3972250004Muffler Assy C2331100002 0019210025M5333000003 0602325066Fuel Tank Assy C2363000303 08101050040810105400 0264100525Enclosure Assy C2413003202 C3414100104C2414100004 C2414600304Enclosure Assy Door ROD Enclosure Assy Gutter Rubber Seals Assy Seal Rubber Nameplate and Decals Assy Control BOX Group Nameplate and Decals Assy Battery Group Terms and Conditions of Sale Parts Freight PolicyPage HERE’S HOW to GET Help

DCA300SSC specifications

The Multiquip DCA300SSC is a durable and powerful skid-mounted diesel generator designed for a range of applications, including construction sites, events, and emergency backup power. With a robust operational capacity of 300 kilowatts, this generator stands out for its reliability and efficiency in providing continuous power.

One of the key features of the DCA300SSC is its commercial-grade engine. The generator is equipped with a reliable and efficient diesel engine that ensures optimal performance under various operating conditions. This engine is designed for durability and longevity, minimizing the need for frequent maintenance. The generator's high fuel efficiency reduces operational costs, making it an economical choice for businesses and contractors.

Another notable characteristic of the DCA300SSC is its advanced sound attenuation technology. This design feature significantly lowers noise levels during operation, which is essential for applications in populated areas or sensitive environments. The generator is housed in a weather-resistant enclosure that protects it from environmental factors, ensuring consistent performance regardless of weather conditions.

In terms of power management, the DCA300SSC is equipped with a sophisticated digital control panel that allows users to monitor and manage the generator’s performance effectively. The control panel displays vital information, such as voltage, frequency, and run-time hours, facilitating easy operation and troubleshooting. This technology also integrates automatic voltage regulation, enhancing the generator's stability and safety during operation.

Safety is a priority in the design of the DCA300SSC. It is built with multiple safety features, including low oil pressure shutdown, high coolant temperature shutdown, and over-speed protection. These measures provide peace of mind to users by reducing the risk of equipment failure and ensuring safe operation.

The compact design and skid-mounted configuration of the DCA300SSC allow for easy transport and installation, making it a versatile solution for a variety of industries. Additionally, the generator can be configured for different voltage outputs, further increasing its adaptability for specific applications.

In summary, the Multiquip DCA300SSC is a powerful and versatile generator known for its reliability, efficiency, and advanced features. With its durable construction, advanced sound attenuation, user-friendly control panel, and robust safety features, it meets the demands of both commercial and industrial applications with ease. Whether for temporary power supply or backup generation, the DCA300SSC is a suitable choice for professionals seeking dependable energy solutions.
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