Page 3 - Table of Contents; Subject
GEH-5304A 3 Table of Contents Subject Page Introduction .............................................................................................................................. 5Receiving .............................................................................................................
Page 5 - INTRODUCTION; Storage
GEH-5304A 5 Direct Current Motors and Generators Type CD Frames 2512AT, 2513AT, 2812AT, 2813AT I. INTRODUCTION This instruction book covers the CD2512AT-CD2813AT line of DC motors and generators. High voltage and rotating parts can cause serious or fatal injury. The use ofelectric machinery, like al...
Page 6 - Handling
GEH-5304A 6 Brushes should not remain in contact with the commutator during prolonged storage because corrosion mayoccur and later result in flat spots on the commutator. Release the brush springs and lift the brushes whenstored for a period of more than six months. All exposed machined steel parts ...
Page 7 - Table 1; Armature; INSTALLATION; Location
GEH-5304A 7 Table 1 Typical Weights** Motor (Less Accessories) Armature CD2512AT 500 120 CD2513AT 550 135 CD2812AT 650 160 CD2813AT 750 190 **Typical weights. For specific weight, see certified outline. III. INSTALLATION Installation should be in accordance with the National Electrical Code and cons...
Page 10 - Belt Tension Factor, K; Description
GEH-5304A 10 The radial load, W, produced by the belts when tightened just enough to transmit the load withoutslipping is given by the relation: 126,000 x HP W = x K b , lbs D x RPM Where: D = Sheave pitch diameter in inches for V-belt application HPRPM = Maximum ratio of horsepower, including overl...
Page 11 - While Kinamatic; Table 2
GEH-5304A 11 Mounting may be either horizontal or vertical for these bearing life determinations, as long as no axialload (i.e., suspended load) other than the weight of the armature is present if vertical. 5. Special Load Considerations Where the load is overhung beyond the motor shaft extension or...
Page 13 - Less Than; Frame Sizes
GEH-5304A 13 Table 3 Bearing Life at 1750 RPM Average Speed Vs. Load, W (For other av erage speeds, multiply life by life factor) Less Than Speed 500 650 850 1150 1500 2000 2500 3000 4000 5000 Life Factor 2.15 1.83 1.55 1.29 1.10 .92 .80 .72 .60 .55 Description Shaft Shaft Curve Bearing Diameter Mat...
Page 14 - * External inductance may be necessary to limit ripple current.
GEH-5304A 14 Table 4 Power Supply Available A C D E K A √ * * * * C √ √ * * * D √ √ √ * * E √ √ √ √ * N P R a ting C ode K √ √ √ √ √ √ Compatible power supply. * External inductance may be necessary to limit ripple current. C. Power Supply Identification The nameplates of DC motors intended for oper...
Page 16 - (Normally open or normally closed contacts); Table 6; When furnished, see Print Certification for Electrical Rating.
GEH-5304A 16 Thermostats automatically reset after the motor has cooled somewhat. In orderto prevent property damage or injury to personnel, the control circuit should bedesigned to prevent re-energizing of the motor when the thermostat resets. Table 5 Maximum Current Ratings for Thermostats on Drip...
Page 17 - Ventilation System; Figure 1; General Mechanical Inspection; excessive bolt tension and possible bolt breakage.
GEH-5304A 17 The surface of a space heater block becomes hot when the heater is energized.The temperature rise above the ambient temperature may be as high as 400 ° C. Avoid touching heater blocks which have recently been energized to preventburns. Also, to prevent fire or explosion, ignitable dust ...
Page 18 - Medium Carbon Steel
GEH-5304A 18 Table 7 Bolt Tightening Torque Values Hex Head (C1C5) Grade 5 Medium Carbon Steel Thread Sizes (Without Lubricant) (UNC-2A) Lb-Ft N-m 1/4-20 7-9 10-12 5/16-18 13-17 18-23 3/8-16 24-30 33-40 1/2-13 60-75 80-100 5/8-11 120-150 160-200 3/4-10 210-260 280-350 For lubricated bolts, use 65% o...
Page 19 - Noise and Vibration; Table 8; Maximum Amplitude; MAINTENANCE
GEH-5304A 19 2. Noise and Vibration Check for unusual vibration or noises that might indicate rubbing or interference. Vibration of new machines at the bearing housings, as measured by a vibration meter, should not ex-ceed the values shown in Table 8. (Measurements are according to NEMA MG 1-12.06 a...
Page 21 - Table 9
GEH-5304A 21 C. Bearings Ball bearing and roller bearing housings are packed with grease at the factory. Therefore, greasing is notrequired before the motor is put into service. Since the oil in the grease will ultimately become depleted, it isnecessary to relubricate ball bearing and roller bearing...
Page 22 - The following procedure should be used to remove brushes:
GEH-5304A 22 Table 11 Sources of Supply for Bearing Greases GE Supplier’s Temperature Designation Supplier Designation Standard Temperature D6A2C5 GE Supply GE Ball Bearing 15 ° F to 212 ° F 158 Gaither Driv e Grease (supplied in -10 ° C to 100 ° C Mt. Laurel NJ 08054 In small tubes and cans) 1-800-...
Page 24 - Commutator
GEH-5304A 24 Do not use liquid solvents of any kind. Solvents will not remove carbon dustaccumulations, but will spread and wash them into critical areas. Figure 2 Brush Assembly F. Commutator Keep the commutator clean. Ordinarily, the commutator will require only occasional wiping with a piece ofca...
Page 28 - Effect of Temperature on Insulation Resistance; Winding Temperature
GEH-5304A 28 Table 13 Effect of Temperature on Insulation Resistance Winding Temperature Multiplying Factor to Obtain Insulation (Degree C) Resistance at 40 ° C (104 ° F) 80 10.00 70 5.50 60 3.10 50 1.70 40 1.00 30 0.55 20 0.31 10 0.17 Note that for a 104 ° F (40 ° C) decrease in temperature, the in...
Page 29 - Oily Dirt; While FREON TF
GEH-5304A 29 Dirt can be removed from stationary parts of the machine by either compressed air or a vacuum nozzle or acombination of both. Air should be directed between the stator coils, into the pocket corners of bearingbrackets, around the cables and onto the brush rigging. Special care should be...
Page 31 - RENEWAL PARTS; Storage of Renewal Parts
GEH-5304A 31 An extreme overload or electrical failure may result in heating or arcing, whichcan cause the insulation to give off noxious fumes. All power should be re-moved from the motor circuit as a precaution, even though the circuit hasoverload protection. Personnel should not approach the moto...
Page 32 - Recommended Spare Parts
GEH-5304A 32 Table 14 Recommended Spare Parts Number of Duplicate Motors in Serv ice More Description 1 2-4 5-10 10-20 Than 20 With or Without Electrical Shop FacilitiesComplete Machine --- --- --- 1 2 Ball Bearing (Sets) 1 1 1 2 3 Brushes (Sets) 2 4 6 8 10 Brushholders (Sets) --- 1/2 1/2 1 1 Brushh...
Page 33 - Commutator Check Chart; For Comparing Commutator Surface Markings; SATISFACTORY COMMUTATOR SURFACES; WATCH FOR THESE DANGER
GEH-5304A 33 Commutator Check Chart For Comparing Commutator Surface Markings SATISFACTORY COMMUTATOR SURFACES LIGHT TAN FILM over entire com m u-tator surface is one of m any norm alconditions often seen on a well-functioning m achine- MOTTLED SURFACE with random filmpattern is probably the m ost f...
Page 35 - Figure 4
GEH-5304A 35 Figure 4 Blower Unit, Commutator End Mounted for Use With CD2512AT – CD2813AT Frames
Page 37 - Quick Kit Reference
GEH-5304A 37 Table 15 Air Flow Requirements For Separately Ventilated Motors Static Pressure Inches of W ater A B Base Standard Enclosed Speed Separately Separately Frame RPM CFM Ventilated Ventilated 2512AT, 2513AT All 380 4.85 6.1 2812AT, 2813AT All 455 4.8 5.64 A. Standard Separately Ventilated A...
Page 38 - Figure 6
GEH-5304A 38 Figure 6 Accessory Mounting CD2512AT – CD2813AT
Page 39 - Figure 7
GEH-5304A 39 Figure 7 Accessory Mounting CD2512AT – CD2813AT
Page 41 - DC Motors & Generators; Figure 8
GEH-5304A 41 Type CD Frames 2512AT – 2813AT DC Motors & Generators Figure 8 Type CD Frames 2512AT – 2813AT
Page 42 - General Electric Company
GEH-5304A 42 5HDGHU&RPPHQWV General Electric Company We welcome comments and suggestions to make this publication more useful. Your Name Today’s Date If needed, how can we contact you? Your Company’s Name and Address Job Site Fax No. GE Requisition No. Phone No. Your Job Function / How You Use T...
Page 43 - Detach and fax or mail to the address noted above.
GEH-5304A 43 Detach and fax or mail to the address noted above.
