Multiquip operation manual DCA-125USJ 50 HZ- General Information

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DCA-125USJ (50 HZ)— GENERAL INFORMATION

DCA-125USJ (50 HZ) Series Familiarization

Generator

The MQ Power Model DCA-125USJ (50 HZ)is a 80 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:

zTachometer

zWater Temperature Gauge

zOil Pressure Gauge

zCharging Ammeter Gauge

zFuel Level Gauge

zPre-heat Lamp

zPanel Light/Panel Light Switch

zAuto ON/OFF Engine Controller (MPEC)

zFuel Leak Detected Alarm Lamp

Generator Control Panel

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

zFrequency Meter (Hz)

zAC Ammeter (Amps)

zAC Voltmeter (Volts)

zAmmeter Change-Over Switch

zVoltmeter Change-Over Switch

zVoltage Regulator

z3-Pole, 300 amp Main Circuit Breaker

Control Box

The “Control Box”, located behind the Generator Control Panel, is provided with the following:

zAutomatic Voltage Regulator

zCurrent Transformer

zOver-Current Relay

zVoltage Rectifer

zStarter Relay

zEngine Controller (Computer Controlled)

zVoltage Selector Switch

Output Terminal Panel

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

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

zThree auxilliary circuit breakers, 50A

zTwo 100V output receptacles (GFCI), 20A

zTwo GFCI circuit breakers, 20A

zFive output terminal lugs (3Ø power)

zBattery Charger (Optional)

zWater Heater (Optional)

Open Delta Excitation System

The DCA-125USJ (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.

Engine

The DCA-125USJ(50 HZ)is powered by a 4 cycle, water cooled, direct injection, turbocharged JOHN DEERE Model 6068TF275 Diesel Engine.This engine is designed to meet every performance requirement for the generator. Reference Table 1 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 5) as a guide for selecting proper extension cable size.

PAGE 20 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)

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Contents Model DCA-125USJ Page Heres HOW to GET Help Wilmington Ave Carson, CATable of Contents Parts Ordering Procedures When ordering parts Please supply the following informationDCA-125USJ 50 HZ- Specifications DCA-125USJ 50 HZ- Dimensions TOP, Side and Front DimensionsDCA-125USJ 50 HZ Safety Message Alert Symbols For Your Safety and the Safety of OthersDCA-125USJ 50 HZ Safety Message Alert Symbols Over Speed Conditions Sight and Hearing hazardDCA-125USJ 50 HZ Rules for Safe Operation Radiator DCA-125USJ 50 HZ Rules for Safe OperationElectrical shock, electrocution, and even death Transporting BatteryDCA-125USJ 50 HZ- Rules for Safe Operation Towing Safety Precautions DCA-125USJ 50 HZ- Rules for Safe OperationDCA-125USJ 50 HZ- Installation Mounting DCA-125USJ 50 HZ- InstallationOutdoor Installation DCA-125USJ 50 HZ-TOWING Safety Precautions Generator with TrailerDCA-125USJ 50 HZ-TRAILER Specifications Explanation of ChartFrame Width Measurement is from fender to fender Coupler Type of hitch used on the trailer for towingDCA-125USJ 50 HZ- Generator Decals Generator DecalsDCA-125USJ 50 HZ- Generator Decals DCA-125USJ 50 HZ- General Information DCA-125USJ 50 HZ- Major Components Generator Major ComponentsPage DCA-125USJ 50 HZ- Generator Control Panel Generator Control PanelDCA-125USJ 50 HZ- Engine Operating Panel Engine Operating PanelDCA-125USJ 50 HZ- Engine Operating Panel DCA-125USJ 50 HZ- Output Terminal Panel Familiarization Output Terminal Familiarization100VAC Gfci Receptacles Twist Lock Dual Voltage 100/200 VAC ReceptaclesConnecting Loads Blower FanSingle Phase Load Three Phase LoadDCA-125USJ 50 HZ- Load Application Motors and motor-drivenVoltage Selector Switch DCA-125USJ 50 HZ- Generator OutputsGenerator OutputVoltages Generator AmperageReading Amperage How to Read the OutputTerminal GaugesDCA-125USJ 50 HZ- Gauge Reading DCA-125USJ 50 HZ- Output Terminal Panel Connections Uvwo Terminal Output Voltages3Ø 220/127 Output Terminal Lug Voltages 3Ø 200V/1Ø115V Output Terminal Lug Voltages1Ø 200V/100V Output Terminal Lug Voltages DCA-125USJ 50 HZ- Output Terminal Panel Connections3Ø 440/254 Output Terminal Lug Voltages DCA-125USJ 50 HZ- PRE-SETUP Circuit BreakersLubrication Oil Fuel CheckDCA-125USJ 50 HZ- PRE-SETUP Refueling ProcedureContact and/or inhaling fumes ALWAYS! place trailer on firm level ground before refuelingCleaning the Radiator Air Cleaner Fan Belt TensionOperation FreezingWeather Must be less than 50%Battery Cable Installation When connecting battery do the followingWiring AlternatorDCA-125USJ 50 HZ- Generator START-UP Procedure Manual Before StartingStarting Manual LED onOil Pressure Gauge DCA-125USJ 50 HZ- Generator START-UP Procedure Auto Mode Starting Auto ModeShutdown Procedure DCA-125USJ 50 HZ- Generator SHUT-DOWN ProcedureEmergency Shutdown Procedure DCA-125USJ 50 HZ- Maintenance Air Removal Check Oil LevelReplacing Oil Filter Replacing Fuel FilterDCA-125USJ 50 HZ Operation and Parts Manual REV. #0 03/11/05 DCA-125USJ 50 HZ-TRAILER Brakes Maintenance Brake AdjustmentBrakes Hydraulic Surge BrakesDCA-125USJ 50 HZ-TRAILER Maintenance Tires/Wheels/Lug NutsTire Wear/Inflation SuspensionStart all wheel lug nuts by hand DCA-125USJ 50 HZ-TRAILER MaintenanceLug Nut Torque Requirements DCA-125USJ 50 HZ-TRAILERWIRING Diagram Trailer/Towing Vehicle Wiring DiagramDCA-125USJ 50 HZ- Generatorwiring Diagram Generator Wiring DiagramDCA-125USJ 50 HZ- Enginewiring Diagram Engine Wiring DiagramDCA-125USJ 50 HZ-TROUBLESHOOTING Generator Generator TroubleshootingDCA-125USJ 50 HZ-TROUBLESHOOTING Engine Controller Engine Controller TroubleshootingExplanation of Code in Remarks Column Items Found In the Items Number ColumnTo 3 Units Qty DescriptionDCA-125USJ 50 HZ- Generator Assy DCA-125USJ 50 HZ- Generator Assy DCA-125USJ 50 HZ- Control BOX Assy M3213000702 03300001800601808823 LAF3630010393PDCA-125USJ 50 HZ- Control BOX Assy DCA-125USJ 50 HZ- Control BOX Assy DCA-125USJ 50 HZ- Engine and Radiator Assy M3923200054 0602041292RE504836 0602042594Engine & Radiator Assy DCA-125USJ 50 HZ- Engine and Radiator Assy DCA-125USJ 50 HZ- Outputterminal Assy DCA-125USJ 50 HZ- Outputterminal Assy DCA-125USJ 50 HZ- Battery Assy 0602220196 4D-2M9310500404 M9103000504DCA-125USJ 50 HZ- Muffler Assy M3330100402 0017112030M3333000903 M3333200304DCA-125USJ 50 HZ- Fueltank Assy DCA-125USJ 50 HZ- Fuel Tank Assy DCA-125USJ 50 HZ- Enclosure #1 Assy Enclosure #1 AssyM3413001812 M33633003030016910030 0603306797DCA-125USJ 50 HZ- Enclosure #1 Assy 24A M3493200614 24A M34932012040010114040 25A 0030014000DCA-125USJ 50 HZ- Enclosure #2 Assy Enclosure #2 AssyM3443000802 M3443000812M3493303203 M3443000904DCA-125USJ 50 HZ- Rubber Seals Assy 0229200870 02292011300229201240 0228900660DCA-125USJ 50 HZ- Nameplate and Decals Assy M1550000204 M15000020M1550000703 M15000070Terms and Conditions of Sale Parts DCA-125USJ 50 HZ Operation and Parts Manual REV. #0 03/11/05 Your Local Dealer is