PegasusTMMHVMedium VoltageAC Induction Motors

NEMA Frames 8200-8900500-22,000 HPIEC Frames 400-1000400-15,000 kW

GEMotors

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Experience MattersWe’ve manufactured motors for over 125 years.In 1879, GE founder, Thomas Edison constructed the first electricmotor for a 110 to 120 Volt line at Menlo Park, NJ. This devicestill exists and is operative! It is located in the Edison HistoricalCollection in New Jersey.

Since 1987, GE has produced over 15,000 medium/high voltagemachines. We’ve been a certified ISO 9001:2000 Quality Systemsince 1992. Six Sigma processes have been hardwired intoour organic functions since 1995. And now we presently offera full range of large motors and generators up to 100,000HP(75,000KW).

Applications & StandardsThese motors are commonly used in the petrochemical, powergeneration, water & waste water industries for centrifugal compressors and blowers, boiler feed pumps and multi-stage highpressure pumps such as water injection or pipeline applications.

GE Motors can hold to these standards and certifications: NEMA,IEC, CSA, API 541 & 547, ATEX, GOST, ABS, DIV 2, Ex-n for Zone 2

Compact, energy-efficient machines have less life-cycle costs and quicker payback for your investment

Optimized electro-magnetic designs and an improved ventilation/cooling system

• Increased motor output per frame size

Redesigned rotor and stator cores, air baffles and frames• Better efficiency from optimized airflow

with minimal pressure drop

Redesigned fans• Better efficiency from dramatically reduced windage loss

More compact machine sizes• Equipment suppliers can save on

packaging and transportation costs

Compactness and energy efficiency are achieved through the use of FEA (Finite Element Analysis) to optimize magnetic flux densities. This allows us to reduce stator and rotor core size.

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Ventilation and CoolingA new design was developed to improve heat exchangewith a low-pressure drop. • A new internal fan was developed to match internal

airflow requirements.• For TEAAC enclosures a new external fan design

was developed to match cooler characteristicsand reduce noise.

• Heat is dissipated much more efficiently due to aredesign in the internal air flow circuit configurationwhich increases the heat exchange area and air flow.

Low VibrationA dramatic reduction in vibration due to design changeshas been realized. The PegasusTM MHV exhibits a lowvibration, low thermal vector and slow roll, meetingAPI-541 requirements. This was due to a major focuson design and process improvements.

Inverter Duty / ReliabilityVFD applications are best served by these machineswith strict adherence to NEMA MG1 part 31 andIEEE-522 figure 2 (or figure 1 if requested). They includean insulated bearing and shaft grounding brush whichdecreases the possibility of circulating shaft currents.

Meets API 541 4th Edition for Petroleum & Chemical ApplicationsVibration and total electrical/mechanical run out levelsmeet stringent API 541 4th Edition standards whichtranslates to increased motor uptime and an improvedoverall reliability. A test system compatible with vibration

sensoring methods, normally used in Oil & Gas applica-tions, allow a high sampling rate acquisition for vibrationrecording and is capable of recording frequency spec-trums and polar plots. Use of a dual frequency heatrun test minimizes erroneous vibration compared to a motor coupled to a dynamometer.

Reduction of High HarmonicsUsing the latest engineering simulation tools and modernmodal testing equipment made it possible for GE to designa stator which reduced the possibility of operating closeto high amplification regions. Flexible or rigid shaftconstruction may be used based on specific applicationrequirements and design criteria. This is critical when amotor is mounted to a compressor or pump skid.

Stator ConstructionStator laminations are precision punched from highquality, low loss electrical sheet steel with a thermallystable insulating film. Most ratings are of rectangularframe construction, utilizing packaged cores. Themagnetic core consists of laminations compressed formechanical strength and completely wound before thecore package is inserted into the frame. This constructionpermits free access to the coil end-turns during manufac-ture and simplifies insertion of the winding and bracingsystems. This visual accessibility also helps to ensureincreased quality in manufacturing.

Redesigned stator frames using powerful engineering tools such as FEA, which significantly reduce overall vibration levels.

The stator assembly was configured forincreased air flow which improved heattransfer and led to a more compact design.

Superior Design

Improved ventilation and cooling has beenachieved with a new internal fan design. This allows the Pegasus MHV motor to match internal air flow requirements.

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Insulation System More than 30 years of successful field experience provesthe reliability of the insulation system used for PegasusMHV machines. In addition to providing the necessary electrical insulation, this system meets all the stringent mechanical and thermal requirements found in modernapplications. Pegasus MHV products use an epoxysolventless resin vacuum-pressure-impregnation (VPI)process to unite superior insulation materials into a complete insulation system assuring long life. For linevoltages of 5000 Volts and above, a semi-conductingarmour is applied to the slot portion and graded beyondthe core to provide corona protection. The binding agentused in this case is GE's third generation epoxy resin,selected and tested to IEEE-429 and IEEE-1043. The coilsreceive a protective armor of heavy glass tape for protec-tion against mechanical shock and abrasion. A mylarlesssystem is available up to 4kV.

GE's Custom Polyseal7 insulation system is also availableupon request. Custom Polyseal7 is a sealed windinginsulation system which meets NEMA MG1 1.27.2 andpasses the test criteria for 12.62 and 20.18. It is designedto meet severe operation conditions and have resistanceto moisture penetration, oil, chemicals and salt water.

Rotor ConstructionThe “squirrel cage” induction motor is a rugged yet simplecombination of shaft, magnetic circuit and electric wind-ing. The magnetic circuit consists of punched thin steeldiscs assembled to form a laminated magnetic coremounted on the shaft. The laminations are coated witha temperature stable insulating film to reduce magnetic

losses yet maintain dimensional stability in the face ofsevere thermal and mechanical stresses. The rotorwinding consists of a number of uninsulated metal barsin the outer surface of the magnetic core parallel to theshaft and short circuited by metal rings at both ends.

Standard Rotor Features:• Aluminum bar rotor is standard.• Copper bar rotor is available to meet API 541 4th Edition

and is standard on 2-pole 8213 frame and larger motors.• A 2 pole machine includes a 5 plane "step" balancing

standard - when flexible shaft is utilized, this assuresbest vibration for increased performance and life.

• 4140 shaft steel material on 2 pole machines.Other speeds may use 1045 shaft steel.

BearingsSelf-aligning spherical seat sleeve bearings per DIN31693. These bearings employ construction featuresand sealing systems designed to keep the oil in and thedirt out. Seal additions are also available to meet IP-55requirements (dust and water jet proof).• The babbit-lined bearing shell is supported by a rugged

housing and employs an oil ring that carries the oil fromthe reservoir up to the bearing.

• Flood lube systems are employed on 2-pole designsabove 2750 HP. The bearings are insulated to eliminatedamaging shaft currents.

• Sight holes and split construction allow easy inspectionand replacement, without uncoupling the drive load.

• Antifriction bearings are available for smaller ratings.

The endshield and internal ventilation circuit wasmodified to improve air circulation. This translatesto a cooler operating bearing.

Fabricated aluminum rotor construction is typicallyincluded. Copper bar rotor construction is availableto meet API 541 4th Edition.

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Weather Protected Type II(WPII) - IP24W and IP44W This enclosure is designed for useoutdoors in adverse conditions andcan be modified to include filters forextreme environments with exces-sive airborne particles. Air passageincludes several abrupt 90 degreechanges in direction plus an intakearea or reduced velocity to allowsolid particles or moisture to dropout before the ventilating aircontacts active parts of the motor.

Totally Enclosed Air-to-AirCooled (TEAAC) - IP54 or IP55TEAAC provides isolation of criticalmotor components from the sur-roundings. The construction of thisenclosure utilizes a top mountedair-to-air heat exchanger. Externalair is drawn in by a shaft mounted fanenclosed in a housing on the oppo-site drive end or blower mounted fanfor larger frames. The air is forcedthrough the cooling tubes at highvelocity to promote efficient coolingand cleaning the tubes. Cooling isaccomplished by circulating theinternal air over the heat exchangertubes where the heat is dissipatedand the cool air is returned to theactive parts of the machine.

Totally Enclosed Water-to-AirCooled (TEWAC) - IP54 or IP55TEWAC enclosure provides isolationof critical motor components fromthe surroundings. Consequently, itcan be used indoors or out in cleanor dirty environments. It is providedwith a water-cooled heat exchangermounted in top portion of the motorfor cooling the recirculated ventilat-ing air. Motor heat is conductedaway by circulating water and notby discharged hot air, this it is suit-able for confined areas. It is also thequietest of all available enclosures.

Weather Protected Type I(WPI) - IP23A weather protected Type I machineis an open machine with its ventilat-ing passages so constructed as tominimize the entrance of rain, snow,and airborne particles to the electricparts, and having its ventilationopenings so constructed as to pre-vent the passage of a cylindrical rod0.75"/19mm in diameter.

Expansive Product Offering

WPI / WPII WPI / WPII WPI / WPII TEWAC TEWAC TEWAC

IP23 / IP44W TEAAC IP23 / IP44W TEAAC IP23 / IP44W TEAAC*HP kW IP54 / IP55 IP54 / IP55 IP54 / IP55 IP54 / IP55 IP54 / IP55 IP54 / IP55

500 373600 448700 522800 597900 671

1000 7461250 9331500 11191750 13062000 14922250 16792500 18653000 22383500 26114000 29844500 33575000 37305500 41036000 44767000 52227500 5595

2 Pole 4 Pole 6 Pole

* Also includes 400 HP, 300 kW 8200 (NEMA) 400 (IEC) Enclosure

Enclosure Ratings These ratings are based upon4000V. Other voltages areavailable up to 13.2 kV. Contactyour GE representative formore information.

8200 (NEMA) 400 (IEC)

8300 (NEMA) 450 (IEC)

8400 (NEMA) 500 (IEC)

500 (IEC) Only

630 (IEC) Only

imagination at workgGE Motors

USAFort Wayne, IN 46802

800 541 7191www.gemotors.com

82008 General Electric Company All rights reserved. GE, g, Pegasus MHV, Polyseal and Bently Nevada

are trademarks of General Electric Company. Robertshaw is a trademark of Robertshaw Industrial Products.

Metrix is a trademark of Metrix Instrument Company.

GEA-12310D 0608

StatorType Description Installation Qty. Motor Function

RTD Resistance temperature Inside Stator 6 May be connected todetector. The following a monitor, alarm,options are available: or shut-off device.

Copper; 10 ohms @ 250CPlatinum: 100 ohms @ 00C

Nickel: 120 ohms @ 00C

Thermostat Bi-metallic sensor Surface of 1-3 Supplies a signal whentype Klixon (normally end-turns a preset, non-adjustable

open or normally closed) temperature is reached,for alarm or shut-off.

Thermistor Positive temperature Inside Stator 6 Together with the solid state(PTC) coefficient thermistor Coil Slot Two per phase relay, supplies a signal

connected to a solid when a preset, non-adjustablestate relay temperature is reached,

for alarm or shut-off.

BearingsType Description Installation Qty. Motor Function

RTD Resistance temperature In bearing 2 May be connected todetector. The following housing front and rear a monitor, alarm,options are available: or shut-off device.

Copper; 10 ohms @ 250CPlatinum: 100 ohms @ 00C

Nickel: 120 ohms @ 00C

Thermometer Bi-metallic or In bearing 2 Supplies local or remotecapillary tube type housing front and rear indication of temperature.

Thermocouple Element generating a In bearing 2 May be connected tovoltage proportional housing front and rear a monitor, alarm,

to temperature or shut-off device.

Vibration EquipmentSeismic-type such as RobertshawTM measures overall vibration. 1-6 units are located on the frame.Proximity-type such as Bentley NevadaTM measures the shaft vibration. 2-5 units are located on the bearing housing. Acceleration-type such as MetrixTM measures bearing housing vibration. 1-6 units are located on the bearing housing.

Other AccessoriesWhenever required, the following accessories may be supplied:• Surge protection • Tachometers

(capacitors and lightning arresters) • Overspeed switches• Current transformers • Slide rails• Pressure switch • Sole-plates• Space Heater