GE Energy
MD800
Armored Mill Motor
802 to 818 Frame
5– 250 HP
Reliability is critical.
We’ve manufactured motors for over 125 years.
In 1879, GE founder, Thomas Edison constructed the first electric
motor ever made for a 110 to 120 Volt line at Menlo Park, NJ. This
device still exists and is operative! It is located in the Edison Historical
Collection in New Jersey.
Since then, GE has been designing, developing and perfecting DC
motor technology for industrial applications—culminating in the
MD800 Armored Mill Motor.
Applications and Standards
This 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 of the armature coil leads to the commutator
•
makes the motor highly resistant to overloads
GE Benefits
Fast dynamic response and smooth speed control due to
•
optimal system inertia
Advanced Tape-Reinforced Encapsulated Construction
•
•
®
(TREC
vibration, impact and wear
Specifically designed to accelerate, decelerate, or reverse
under conditions of severe duty-cycle operation
) coil technology is highly resistant to contamination,
Optimal Class H insulation protection
•
Rugged inside and out.
Ventilation and Cooling
A new design was developed to improve
heat transfer with a low-pressure drop
Proven GE commutator design has greater stability
for severe MD motor applications with improved
tracking resistance
Cartridge-type bearing assemblies protect
from dirt and contaminants during
Grease relief plug prevents forcing of excess
grease into internal parts of the motor
overhaul
bearing
Commutator risers are TIG welded to
conductors for higher overload capability
armature
Viton®is used to seal commutator bands, preventing
penetration of contaminants into critical areas
Drain holes allow excess moisture to drain
from bottom of motor
Constant-pressure brush holders help to assure
excellent commutation without
adjustment, reducing
maintenance
spring pressure
Class H insulation system withstands high
temperatures and assures long motor life
Cast fans are dynamically balanced
for ease of addition or removal
Heavy-duty shafts are replaceable
Lifting lugs are welded to provide strength,
proper balance and safe handling
separately
TREC®coils provide maximum protection against
abrasion and contaminants along with superior
heat transfer
Split frame permits fast and easy access to
motor parts, minimizing downtime
internal
A full selection.
P Range
H
rame Size MD802 through MD818
F
Enclosures Totally enclosed and forced ventilated
Speed Various
oltage
V
inding Series, shunt, and compound
W
ime Ratings
T
Frames Horizontally split steel frame w/lifting lugs
Shaft Tapered and equal on DE and CE and replaceable without disturbing the windings
mbient 40°C
A
ltitude
A
nsulation Class H
I
Temperature Rise 75°C rise by thermometer or 110°C rise by resistance
Bearing Type Single-width solid cylindrical roller bearing
eads
L
-250
5
30 Volt DC
2
ontinuous, 30 min or 60 min
C
300 ft
3
xit frame F2 configuration (conduit box not standard)
E
Standard Type Product Offering
60 min, 75°C Rise Totally Enclosed,
or Continuous, 75°C Rise
Force-Ventilated
Full-Load Speed,
RPM (Approx.)
Frame
802A 5 900 1025 1025/2050 6.5 750 925 5.5 840 5 1080 5 1130
802B 7.5 800 900 900/1800 10 675 775 8 780 7.5 950 7.5 1000
802C 10 800 900 900/1800 13.5 675 775 10 800 9.5 940 9 1000
More ratings and features are available.
For more information contact your local GE representative or call 1-800-541-7191.
HP
803 15 725 800 800/2000 19 620 725 15 725 14.5 840 14 880
804 20 650 725 725/1800 26 580 650 20 650 18.5 775 17 800
806 30 575 650 650/1950 39 500 600 30 575 28.5 690 25 715
808 50 525 575 575/1725 65 450 525 40 570 37.5 625 35 630
810 70 500 550 550/1650 90 440 500 60 550 52.5 615 45 600
812 100 475 515 515/1300 135 420 475 85 510 75 580 60 565
814 150 460 500 500/1250 200 400 460 115 515 110 565 85 560
816 200 450 480 480/1200 265 400 450 150 500 140 540 110 535
818 250 410 435 435/1100 325 360 400 185 485 165 490 130 470
Series
Compound
or Shunt
Adjustable
Speed
30 min 75°C Rise
Totally Enclosed
Full Load Speed
RPM (Approx.)
HP
Series Compound
Continuous Duty Cycle, 30% Time On,
75°C Rise, Totally Enclosed
Full Load Speed RPM (Approx.)
Series Compound Shunt
HP RPM HP RPM HP RPM
Spare Parts
1 to 4 5 to 9 10 to 19 20 or More
Spare Motor 0 0 1 1
Armature with Bearing Parts 1 1 1 1
Commutator 0 0 1 1
Armature Coils with Winding Supplies 0 1 set 1 set 1 set
Main Field Coil and Pole Assembly 1 set 1 set 1 set 2 sets
Commutating Field Coil and Pole Assembly 1 set 1 set 1 set 2 sets
Brushholders 1 set 1 set 1 set 2 sets
Brushes 1 Spare Set of Brushes for Each Motor
Bearings 0 1 set 1 set 2 sets
Number of Motors
Mill Duty DC Motors – MD800
Per AIST Standards
Approx
Frame
Net Wt
in Lbs
802 600 15.00 20.50 7.63 6.25 8.25 0.75 0.78 3.13 8.63 12.00 15.56 8.19 9.88 32.88 4.50 3.75 5.13 9.75 0.63 2.75
803 770 17.00 23.50 8.50 7.00 9.00 0.88 0.91 3.63 9.13 13.50 17.31 9.00 10.69 37.00 5.50 4.50 5.88 10.63 0.63 3.63
04 960 18.00 25.50 9.00 7.50 9.50 0.88 0.91 4.00 9.75 14.50 18.31 9.31 11.00 39.00 5.50 5.00 5.75 10.88 0.75 3.63
8
06 1300 20.00 27.50 10.00 8.25 10.50 1.00 1.03 4.25 10.00 15.50 20.31 10.31 12.25 42.25 6.25 5.00 6.75 12.00 0.75 4.25
8
808 1790 22.75 31.25 11.25 9.38 12.38 1.13 1.19 4.75 11.75 17.50 22.94 11.69 13.50 42.50 7.25 5.13 7.00 13.50 0.88 4.25
810 2450 24.50 32.50 12.25 10.25 13.00 1.13 1.19 5.25 11.00 18.75 24.94 12.69 14.50 50.25 8.00 5.75 7.00 14.50 1.00 6.06
812 3280 27.00 36.00 13.38 11.25 14.50 1.25 1.31 5.75 11.00 20.50 27.19 13.81 15.63 55.00 8.75 6.25 8.25 15.75 1.00 6.06
814 4500 30.00 41.50 14.75 12.50 16.00 1.50 1.56 6.25 13.50 23.25 29.94 15.19 — 60.75 10.00 7.25 8.75 17.25 1.13 7.69
816 5780 32.50 46.75 16.00 13.50 17.50 1.50 1.56 7.25 17.50 26.00 32.44 16.44 — 67.50 10.00 8.50 9.75 19.50 1.25 7.69
818 7500 36.00 49.75 17.75 15.00 19.50 1.75 1.81 7.75 17.75 17.50 35.94 18.19 — 70.63 10.00 8.00 11.00 21.50 1.38 7.69
Approx
Frame
Net Wt
in Lbs
802 600 4.44 1.75 2.75 1.19 1.00 0.50 0.25 2.62 1.38 1.50 2.38 0.88 2.00 0.25 0.19 2.50 0.25 1.00 0.88 0.38 0.50 7.25 4.75 2.19 7.00 8.62 3.00
803 770 5.00 2.00 3.25 1.25 1.25 0.50 0.25 3.12 1.50 1.50 2.38 0.94 2.25 0.25 0.19 2.88 0.31 1.13 1.75 0.50 0.50 8.50 5.00 3.25 7.00 9.50 3.00
804 960 5.00 2.00 3.25 1.25 1.25 0.50 0.25 3.12 1.50 1.50 2.38 0.94 2.25 0.25 0.19 2.88 0.31 1.12 2.25 0.50 0.62 9.00 5.50 2.75 7.00
806 1300 5.62 2.50 3.75 1.38 1.50 0.50 0.25 3.75 2.00 2.00 2.88 1.06 2.75 0.38 0.31 3.25 0.38 1.25 2.12 0.50 0.75
808 1790 6.25 3.00 4.25 1.50 2.00 0.75 0.25 4.12 2.50 2.50 3.50 1.19 3.50 0.44 0.38 4.31 0.66 1.50 2.00 0.50 0.88
810 2450 6.38 3.25 4.25 1.62 2.25 0.75 0.25 4.12 2.75 2.75 3.75 1.31 4.00 0.50 0.44 4.75 0.75 1.62 2.12 0.50 0.88
812 3280 7.00 3.62 4.75 1.75 2.50 0.75 0.25 4.62 3.00 3.00 4.00 1.44 4.25 0.50 0.44 5.00 0.62 1.88 2.50 0.62 1.00
814 4500 7.12 4.25 4.75 1.88 3.00 1.00 0.38 4.62 3.50 3.50 5.00 1.56 4.75 0.38 0.31 5.88 0.72 2.22 3.38 0.62 1.25
816 5780 7.75 4.62 5.25 2.00 3.25 1.25 0.38 5.12 4.00 4.00 6.00 1.69 5.38 0.38 0.31 6.50 0.62 2.62 2.50 1.00 1.12
818 7500 7.81 5.00 5.75 1.56 3 1/2 1.25 0.50 5.62 4.00 4.00 6.00 1.25 5.75 0.38 0.31 6.75 0.75 2.62 3.88 1.00 1.38
A B D E F G H J K LM O XA XB XC XD XG XK XL XM XP
Shaft Keyway Key Nut and Lockwasher Vent. Duct Flange Surface Motor Leads
N FN U V Y XE
Wdth Dpth Lgth
ZB ZC ZD ZE ZF ZG ZH ZL ZM ZN VB VC VD VE VF VG YE YH YK
Dimensions in Inches
Dimensions in Inches
10.25
6.00 3.38 7.00
11.50
6.50 3.50
12.00
7.00 3.62
13.75
8.25 4.88
15.25
9.25 5.50
16.00 11.00
18.00 12.00
6.62
7.12
10.00
11.00
10.00 12.50
10.00 13.50
10.00 14.62
12.00 16.25
12.00 17.50
12.00 19.25
GE Energy
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.
GEA-17259 01-09
3.00
3.00
3.00
3.00
3.00
3.00
4.50
4.50
USA
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