Multiquip DCA300SSCU manual General Information

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General Information

Generator

The MQ Power DCA300SSC and DCA300SSCU generators (Figure 3) are 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

Each 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

Both generators are 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 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 — DCA300SSC / DCA300SSCU Gen. • operation and parts manual — rev. #1 (08/10/11)

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Contents Model dca300ssc Model dca300sscU Proposition 65 warning Reporting Safety Defects NhtsaTable of Contents DCA300SSC/DCA300SSCU 60 Hz GeneratorsChoose from three easy options Safety Information SaFetY meSSageSGeneral SaFetY Generator SaFetYRestricted. If the air fl ow is Engine SaFetYIf operating in speed ranges above the maximum allowable FUel SaFetY ToWing SaFetY„ never use fuel as a cleaning agent From fuel vapors or if fuel is spilled on a hot engineGrounding Safety EleCtriCal SaFetYPower Cord/Cable Safety BatterY SaFetY Environmental SaFetYSpecifications DCA300SSC/DCA300SSCUDimensions DimensionsInstallation Typical Generator Grounding ApplicationOutdoor Installation Indoor InstallationMounting Generator GroundingGeneral Information Major Components Item noGenerator Control Panel Pilot Lamp Indicates the system is runningGenerator Control Panel Immediately cleaned or replaced Engine Operating PanelPage Terminal legs O and Ground are considered bonded grounds Output Terminal FamiliarizationOutput Terminal Panel is provided with the following VAC Gfci Receptacles 240V Twist-Lock Auxiliary ReceptaclesConnecting Loads Over Current RelayThree Phase Load Single Phase LoadLoad Application Voltage Change-Over Board Generator Output VoltagesMaximum Amps How to Read the ac ammeter and ac voltage gauges Generator OUTPUTS/gauge readingAC Ammeter Gauge Reading AC Voltmeter Gauge ReadingUvwo Terminal Output Voltages 3Ø-240V Uvwo Terminal Output Voltages1Ø-240V Uvwo Terminal Output Voltages 1Ø-120V 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 AlternatorPlace the engine speed switch in the LOW down position Before StartingStarting Manual Engine’s exhaust contains harmful emissionsFrequency Meter Starting Auto Mode Before connecting this generator to anyPlace the engine speed switch in the High position Place the Mpec Control Switch in the Auto positionEmergency Shutdown Procedure Normal Shutdown ProcedureNever stop the engine suddenly except in an emergency General 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 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 Explanation of Code in Remarks Column Suggested Spare Parts Generator Assy C2110000002 06018424020601823282 0018205020Generator Assy C3154400003 0017106015C3164600103 0010310030Control box Assy M5213000002 06018096590027106015 0601807513Control BOX Assy 38A 0601810244 06018316700601831205 0601830746Engine and Radiator Assy C2923200204 06020152440602046638 0602046639Engine and radiator Assy 0603306395 06020210700269200800 0602010220Engine operating panel Assy C2351101903 M53511000030017106020 0207006000Output terminal Assy C2231700403 M5230700003C0277500004 M9220100914Output terminal Assy 0016908020 C2237102403M5236100104 0019210030Battery ASSY. DCA300ssc 0165511551 C91091006043972250004 0805002904Battery ASSY. DCA300sscu 0602220196 M9310500404M9104000004 0602220921Muffler Assy C2331100002 M53301001020019210025 M5333000003Fuel tank Assy. DCA300ssc C2363000303 08101050040810105400 0264100525Fuel tank Assy. DCA300sscU M5363000202 06055050700605501069 M5364200004Enclosure Assy C2413003202 M5413000004C3414100104 M1413400004Enclosure Assy 0010114050 17A 003001400017B 0040014000 17C 0041214000Enclosure Assy M9114300004 8195146304M9114300104 0845050704Enclosure Assy 67A 0030006000 0845046904M9110100804 68A 0845045004Rubber Seals Assy 0228900650 02289007100229201300 0221200705Nameplate and Decals ASSY. DCA300ssc Remarks Nameplate and Decals ASSY. DCA300ssc Battery Group Nameplate and Decals ASSY. DCA300sscu M5550000303 Nameplate and Decals ASSY. DCA300sscU M9500300004 Terms and Conditions of Sale Parts Freight PolicyPage HERE’S HOW to GET Help

DCA300SSCU specifications

The Multiquip DCA300SSCU is a powerhouse generator designed for both commercial and industrial applications, providing reliable performance in various environments. With a robust design and advanced technology, this generator stands out in the competitive field of portable power solutions.

One of the main features of the DCA300SSCU is its reliable diesel engine, which provides 300 kVA of power. The generator is powered by a fuel-efficient Yanmar engine, known for its durability and low emissions, making it an eco-friendly choice for users who need sustained power without sacrificing environmental standards. This engine is designed to operate efficiently, ensuring lower operational costs over time.

The DCA300SSCU boasts impressive electrical characteristics. It is equipped with a state-of-the-art automatic voltage regulator (AVR) that ensures voltage stability, protecting sensitive electronic equipment from damage due to voltage fluctuations. Additionally, the generator's output can be customized to meet specific needs, offering versatility for various applications ranging from construction sites to events.

This model integrates advanced noise reduction technology, making it quieter than many traditional generators on the market. An enclosed canopy design significantly dampens noise pollution, an essential feature for operation in urban areas or during nighttime events. This focus on reduced sound output allows for greater flexibility in deployment locations without disturbing nearby environments.

Ease of use and maintenance are other key characteristics of the DCA300SSCU. The generator features a user-friendly control panel that makes operation straightforward, even for individuals with minimal experience. Additionally, the maintenance intervals are designed to be manageable, reducing downtime and ensuring that the generator stays operational when it’s needed most.

In terms of mobility, the DCA300SSCU is designed with a trailer for easy transportation, allowing it to be moved from one job site to another with minimal effort. The robust frame and integrated lifting points ensure stability and safety during transit.

In summary, the Multiquip DCA300SSCU is a powerful, efficient, and versatile generator that meets the demands of numerous applications. With its dependable diesel engine, advanced voltage regulation, noise reduction mechanisms, and user-friendly design, it is an ideal choice for professionals seeking a high-performance power solution.
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