7/28/2019 GE MD800 Armored Mill Motor

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GE Energy

Applications and StandardsThis low base speed, high torque motor is used in high

performance, automatic control systems that require a fast

transient response. These motors are ideal for use in steel

plants, excavating equipment, shipyard cranes, coal and ore

dock cranes. They operate well in constant potential or

adjustable voltage drive systems with either rectified power

supplies or motor-generator sets.

MD800 motors meet standards established by the

Association of Iron and Steel Technology (AIST).

Key Features

~ 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

MD800 Armored Mill Motor

802 to 818 Frame, 5 250 HP

features& benefits

GE Benefits~ Fast dynamic response and smooth speed control due to

optimal system inertia

~ Advanced Tape-Reinforced Encapsulated Construction

(TREC) coil technology is highly resistant to contamination,

vibration, impact and wear

~ Specifically designed to accelerate, decelerate, or reverse

under conditions of severe duty-cycle operation

~ Optimal Class H insulation protection

7/28/2019 GE MD800 Armored Mill Motor

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Printed on recycled paper. GEA-17259 (05/09)

GE Energy

USA

Fort Wayne, IN 46801

Motors 800 541 7191

Parts 800 458 0451

www.gemotors.com

2009 General Electric Company All rights reserved.GE and the GE Monogram are trademarks of General Electric Company.Viton is a registered trademark of DuPont Company.TREC is a registered trademark of General Electric Company.

Lifting lugs are welded to providestrength, proper balance andsafe handling

Split frame permits fast andeasy access to internal motorparts, minimizing downtime

Heavy-duty shaftsare replaceable

Class H insulation system withstandshigh temperatures and assures longmotor life

Cast fans are dynamicallybalanced separately forease of addition or removal

Viton is used to seal

commutator bands,preventing penetrationof contaminants intocritical areas

Cartridge-type bearing assembliesprotect bearing from dirt andcontaminants during overhaul

Drain holes allow excessmoisture to drain frombottom of motor

Commutator risers are TIG weldedto armature conductors for higheroverload capability

Proven GE commutator design has greater stabilityfor severe MD motor applications with improvedtracking resistance

Constant-pressure brush holders help to assureexcellent commutation without spring pressureadjustment, reducing maintenance

TREC coils provide maximum protectionagainst abrasion and contaminantsalong with superior heat transfer

Grease relief plug preventsforcing of excess grease

into internal parts of themotor

Ventilation and CoolingA new design was developed to improve heat transfer

with a low-pressure drop