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2/09

Installation & Operating Manual

MN605

Integral Horsepower

DC Motor

Designed for operation with an SCR Control

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Summary of Contents for MN605

Page 1: ...2 09 Installation Operating Manual MN605 Integral Horsepower DC Motor Designed for operation with an SCR Control ...

Page 2: ...Any trademarks used in this manual are the property of their respective owners Important Be sure to check www baldor com to download the latest version of this manual in Adobe Acrobat PDF format ...

Page 3: ... 2 Motor Connections 2 2 Thermostats 2 3 Blower Ventilation System 2 3 Initial Start Up 2 4 Coupled Start Up 2 4 Section 3 Maintenance Troubleshooting 3 1 General Inspection 3 1 Relubrication Bearings 3 1 Type of Grease 3 1 Lubrication Intervals 3 1 Lubrication Procedure 3 2 Brush Replacement 3 3 Brush Springs 3 3 Poor Brush Life 3 3 Brush Chatter or Bounce 3 3 Brush Sparking 3 3 Carbon Brushes Fo...

Page 4: ...05 Armature Overheating 3 6 Field Coil Overheating 3 6 Excessive Load 3 6 Jogging and Repeated Starts 3 6 Heating 3 6 Thermostat 3 6 Reflash Instructions 3 7 Accessories 3 8 Section 4 Connection Diagrams 4 1 ...

Page 5: ...ct with hot surfaces When installing protection should be provided by the user to protect against accidental contact with hot surfaces Failure to observe this precaution could result in bodily injury WARNING Guards must be installed for rotating parts to prevent accidental contact by personnel Accidental contact with body parts or clothing can cause serious or fatal injury WARNING This equipment m...

Page 6: ...ith no load broken belt etc An unloaded motor may reach destructive high speeds Caution Motors designed for forced ventilation must have cooling air when fields are excited at rated voltage Installations having the air supply interrupted when the motor is not operating must have field disconnected or field voltage reduced to 50 rated by means of field economizing resistor and relay or motor insula...

Page 7: ...ent are to be connected and energized whenever there is a possibility that the storage ambient conditions will reach the dew point Space heaters are optional Note Remove motor from containers when heaters are energized reprotect if necessary 3 Measure and record the resistance of the winding insulation dielectric withstand every 30 days of storage a If motor insulation resistance decreases below t...

Page 8: ...rical resistance of the winding insulation resistance meter at the time of removal from storage The insulation resistance must not be less than 50 from the initial reading recorded when the motor was placed into storage A decrease in resistance indicates moisture in the windings and necessitates electrical or mechanical drying before the motor can be placed into service If resistance is low contac...

Page 9: ...ed be sure that they are evenly supported by the foundation or mounting surface After installation is complete and accurate alignment of the motor and load is accomplished the base should be grouted to the foundation to maintain this alignment The standard motor base is designed for horizontal or vertical mounting Adjustable or sliding rails are designed for horizontal mounting only Consult your B...

Page 10: ...int to the grounding bolt provided inside the conduit box Conduit Box For ease of making connections an oversize conduit box is provided The box can be rotated 360 in 90 increments Power Connect the motor leads as shown on the connection diagram located on the name plate or inside the cover on the conduit box Be sure the following guidelines are met 1 DC power is within 5 of rated voltage not to e...

Page 11: ...ecked for correct rotation Don t rely on feeling airflow from the drive end of the motor Look at the outline drawing or rotation arrow shown on the blower housing Refer to Figure 2 2 Figure 2 2 View from Air Inlet Motor is on Opposite Side Table 2 4 Electrical Data Forced Ventilation Blower Units Size Motor Frame HP RPM Volts Phase Hz Amps LM2 180 1 40 3000 230 1 60 0 4 LM3 180 1 8 3450 115 230 1 ...

Page 12: ...o load broken belt etc An unloaded motor may reach destructive high speeds If the direction of rotation needs to be corrected disconnect the input power supply and interchange the appropriate leads Refer to the motor connection diagrams in Section 4 of this manual 1 The first start up and running of the motor should be with the motor uncoupled from the load 2 Check the direction of rotation by mom...

Page 13: ... can cause overheating of the motor and shorten its life 6 At start up check the tightness of the main and commutating pole bolts external on the frame as listed in Table 3 1 Loose pole bolts could be a source of unpleasant noise when rectified power runs the motor Table 3 1 Torque Specifications for Commutating and Main Pole Bolts Frame Bolt Size Torque lb ft 180AT 3 8 16 24 30 210AT 3 8 16 24 30...

Page 14: ...rease you are adding to the motor is compatible with the grease already in the motor Consult your Baldor distributor or an authorized service center if a grease other than the recommended type is to be used Caution To avoid damage to motor bearings grease must be kept free of dirt For an extremely dirty environment contact your Baldor distributor or an authorized Baldor Service Center for addition...

Page 15: ...oads Friction reducing treatments reduce wear on high speed applications Where light loading is the cause the answer may be to remove some brushes from the motor with multiple brushes per pole Another is to install brushes with a higher content of graphite that can handle the lower current and still film properly Poor brush life is generally not related to the softness or hardness of the brush Do ...

Page 16: ...applied lightly to the commutator surface This operation must be done with no load on the motor The surface of the commutator should be smooth and round This can be checked while the motor is running at low speed Press lightly on one brush with an insulated stick Do not use a lead pencil as this contains electrically conductive graphite If you feel movement of the brush it suggests a worn or uneve...

Page 17: ...king condition as the metal transferred becomes work hardened and machines into the commutator surface With increased loads and increased spring pressure this condition can be avoided Grooving May result from an overly abrasive brush grade The more common cause is poor electrical contact resulting in arcing and the electrical machining of the commutator surface Increased spring pressure reduces th...

Page 18: ...lified personnel If you find any of the above defects don t run the motor First contact your local Baldor District Office or an Authorized Baldor Service Center for repairs Excessive Load Excessive load may be found by checking the DC armature ampere input and comparing it with the rating on the nameplate An excessive load may prevent the motor from starting or accelerating to full load speed It c...

Page 19: ...rease until cavity is approximately 3 4 filled Vibration Misalignment Check and align motor and driven equipment Rubbing between rotating parts and stationary parts Isolate and eliminate cause of rubbing Armature out of balance Have armature balance checked are repaired at your Baldor Service Center Resonance Tune system or contact your Baldor Service Center for assistance Noise Foreign material i...

Page 20: ...r Baldor distributor to confirm that the motor is designed for vertical mounting Fan Cover Lint Screen To prevent build up of debris on the cooling fan Nameplate Additional stainless steel nameplates are available Roller Bearings Recommended for belt drive applications with a speed of 1800 RPM or less Rotation Arrow Labels Rotation arrows are supplied on motors designed to operate in one direction...

Page 21: ...2 Interpole Armature Series Field Series Motor CW Rotation Facing Commutator End Armature A1 A2 S2 S1 Compound or Stabilized Shunt Motor CCW Rotation Facing Commutator End High Voltage Field Connection Shunt Field F1 F2 F3 1 A 4 F A2 S2 S1 Shunt Field F1 F2 F3 F4 Armature Reversing Compound and Stabilized Motors Compound or Stabilized Shunt Motor CW Rotation Facing Commutator End High Voltage Fiel...

Page 22: ... Field Connection Armature Shunt Field Interpole Series Field Comm Field Shunt Field Shunt Motor CW Rotation Facing Commutator End High Voltage Field Connection Armature Shunt Field Interpole Field Reversing Shunt Motor CCW Rotation Facing Commutator End For CW Rotation Interchange Leads A1 and A2 DC Generator Connection Diagram Compound Wound Short Shunt Connection ...

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Page 24: ...ctric Company P O Box 2400 Fort Smith AR 72902 2400 U S A Ph 1 479 646 4711 Fax 1 479 648 5792 International Fax 1 479 648 5895 www baldor com Baldor Electric Company MN605 All Rights Reserved Printed in USA 2 09 ...

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