You decide.AC or DC Excavator Solutions from GE.Either way, you win.

GE Energy

The right excavatordrive solution for yourrequirements andenvironment.

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Experience MattersGE’s experience in the mining industry spansover 80 years, and we have earned ourreputation for reliability by providingcomprehensive excavator solutions that performin challenging conditions.

No BarriersDepending on your site requirements, we havethe AC or DC drive systems available to upgradeyour existing equipment.

Global ServicesWith GE, you have a single source for all yourdesign, build, installation and commissioningneeds through our global network of servicecenters staffed with experienced projectengineers.

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GE offers a complete engineeredsolution for excavator applications.

AC or DC – The decision isyoursGE has an offering whether you need an AC or DC solution. Oursystems approach emphasizes a solution optimized to yourapplication, with high productivity, high availability and drop-inmechanical compatibility with AISE MD motor standards forboth AC and DC applications.

AC solutions offer state-of-the-art IGBT variable frequencydrives, while our DC solutions offer high performance using MGset-based systems, including DC drives, with a decades-longtrack record of performance.

Both AC and DC solutions offer the benefits of air-cooledoperation with power factor control and regeneration ofenergy back to the line for high energy efficiency.

GE has the ability to support all the machine-level controlfunctions with control systems developed through hundreds ofinstallations in excavator systems. The control philosophy in allour excavator systems is to maintain machine-level controland parameters at the PLC/HMI level and place drive-specificfunctions and parameters in controllers that are integratedwith the drive units.

Fault logging, remote diagnostics, data trending, XY plots andtroubleshooting functions are available as a SCADA option.

GE Excavator Solutions

The system hardware andsoftware has been specificallyengineered to meet the needsfor excavator applications:

• High performance

• Proven reliability

• Excavator duty equipment

• Simplified maintenance

• Easy troubleshooting

• Selective lock out or isolation of control/drives for safety in maintenance/troubleshooting

• Designed specifically to maintain control under varying digging conditions

• All GE systems are designed to meet applicable industry standards, e.g. CE, CSA, IEC and NEMA

GE AC Excavator Solutions

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GE AC Excavator Solutions

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The AC system is a complete motion solutioncomprised of an integrated family of powerdelivery elements, Variable Frequency Drives(VFD), AC motors and controls. Each system isdesigned for the specific application using motorsof various frame sizes and mounting orientations(horizontal and vertical) and drives tailored to theplatform.

The AC system is designed to use a master PLC tocontrol system functions, maintainingcommonality of equipment and controlalgorithms with existing DC excavator systems.

Our newly designed air-cooled AC KD800 seriesmotors are mechanically interchangeable withour existing DC MD800 series Mill Duty motors,down to the mounting configurations and shaftheights. This gives you the flexibility to selecteither AC or DC with full confidence, whetherretrofitting existing excavators or engineering anall new design.

• Active Front Ends capable of regenerative operation form the interface to the utility

• Dedicated inverters sized to the motor requirements control each of the motors

• Our insulation system is designed for 20 year winding life under normal excavator operation

• AC systems are designed for higher productivityby providing higher peak and continuous powerratings

• Anti-friction bearing life exceeds major excavator overhaul intervals

• Internal shaft grounding brush is field replaceable

• Field replaceable speed sensors are used to ensure accurate rotor position and rotational direction while providing precise torque control

• Bearings and stators are equipped with factory-installed RTDs

AC PerformanceOur AC system is designed specifically for excavator duty. State of the art motor and drivetechnology is utilized which helps to maximize availability and system reliability.

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FrameContinuous

(KW)2 minute

(KW)Peak (KW)

Peak Torque (N-m)

810 160 220 255 3165812 210 295 340 4420814 310 425 490 6855816 410 585 675 9670818 525 730 840 13,660820 655 975 1,120 21,775822 855 1,260 1,450 31,640824 1,065 1,595 1,830 41,610826 1,270 1,830 2,100 51,005

Output Power Rating

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ACTIVE FRONT END

AC TO DC

INVERTER

DC TO AC

DC BUS ACMOTOR

LOADTRANSFORMER

Power Conversion

UTILITYSUPPLY

SpeedTorque

Utilization

The new family of AC Variable Frequency Drives(VFD) have been developed using a modularapproach. GE’s system is designed to yourspecifications using a common set of modulesand passive components, improving availabilityand reliability.

The system delivers:

• Four-quadrant control of all motor functions with active power factor correction

• An air-cooled drive system designed for minimal maintenance with extended filter change intervals

• AFEs and Inverters configured as Master/Slave with an automatic fail-over feature, which allows for reduced-capability operation until maintenance can be scheduled

• System communication networks use standard bus protocols

The Active Front End in our Variable FrequencyDrives provides high energy efficiency with PowerFactor management to minimize line transientsand disruptions at the Point of CommonConnection (PCC) to the utility. The Inverters aredesigned and rated to support the severe duty ofexcavator motor applications.

Typical AC Drive System Diagram

GE AC Excavator Solutions

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GE DC Excavator Solutions

GE DC Excavator SolutionsThe DC system uses Ward Leonard controls withsynchronous machines driving MG sets, allcontrolled by field exciters. The field exciters areIGBT chopper technology-based and deliver ahigh performance, modular control system tailor-made for excavator use.

The field exciters use digital regulators thatprovide generator and motor control functions bycontrolling armature volts and amps to levels thatmaximize productivity and minimize equipmentstress. The field exciters control the synchronousmotor excitation to provide system reactivepower support during motoring and regenerationas well as line voltage transients.

The exciters share DC power from a common bus,thereby conserving energy, minimizing onboardharmonics and minimizing impact of exciters onsystem power factor.

• Fast dynamic response and smooth speed control due to optimal system inertia

• Specifically designed to accelerate, decelerate or reverse under conditions of severe duty-cycle operation

• GE-specified control components monitor the entire system for new designs, retrofits or DC conversions

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AC MOTOR DC GENERATORSHAFT

MG set

DCMOTOR

LOAD

Power Conversion

UTILITYSUPPLY

SpeedTorque

Utilization

Typical DC Drive System Diagram

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DC Performance

FrameContinuous Rating (KW)

Peak Torque(N-m)

810 145 2773812 190 4101814 280 6355816 370 8967818 475 12,666820X 595 20,191822X 780 29,337824X 970 38,584826 1,155 47,296

We have 50 years of experience in designing,building, and improving DC excavator motors. Our DC solutions deliver reliability and the uptime you need for optimum productivity, even in harsh environments.

GE DC Excavator SolutionsA Legacy of QualityGE has sold hundreds of DC excavator systemswith thousands of motors to mining customersworldwide. The robust motors, generators andMG sets are built to operate in the extremeenvironments on excavators, from Siberian coldto Saharan heat.

• Forced air cooling for motors

• Heavy-duty, double tapered shaft is removable and replaceable

• Single width cylindrical roller bearings for high intermittent and impact thrust capacity

• TIG welding the armature coil leads to the commutator makes the motor highly resistant to overloads

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DC motors are based on AISE frames, ruggedized and continuouslyimproved to meet customer needs.

GEA-13445 102/69wb

For more information, contact yourGE sales representative.GE Energy800 541 7191www.geindustrial.com/excavator

2012 General Electric CompanyAll Rights Reserved

Service Capabilities:

• PLC and SCADA systems

• DC drive upgrades and operator’s consoles

• Complete power control rooms

• Motor control centers

• Light and power boards

• High voltage boards

• Arc flash studies

• Replacement MG sets and motors

• AC system conversions

• Machine audits and tune-up

• Training

• Overhaul and maintenance supervision

Global ServiceGE’s Field Engineers have decades of experience with excavator systems. With a global network of servicecenters, we can provide you with prompt local support and experienced project management personnel.

Why choose GE?GE works on things that matter. The best people and the best technologies taking on the toughestchallenges, GE provides integrated product and service solutions in all areas of the Energy, Oil & Gas,Mining, Petrochemical, Water, and other processing industries. Building, powering, moving and curingthe world. Not just imagining. Doing. GE works.