Baldor MN605 Installation And Operating Manual
Integral Horsepower
DC Motor
Designed for operation with an SCR Control
2/09 Installation & Operating Manual MN605
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Table of Contents
Section 1
General Information ................................................................. 1−1
Overview ...................................................................... 1−1
Important: ...................................................................... 1−1
Safety Notice: ................................................................... 1−1
Receiving ...................................................................... 1−2
Handling Handling ................................................................ 1−2
Storage ........................................................................ 1−3
Preparation for Storage ............................................................ 1−3
Removal From Storage ............................................................ 1−4
EMC Compliance Statement for European Union ........................................ 1−4
Section 2
Installation & Operation .............................................................. 2−1
Overview ....................................................................... 2−1
Location ....................................................................... 2−1
Mounting ....................................................................... 2−1
Alignment ....................................................................... 2−1
Doweling & Bolting ............................................................... 2−1
Guarding ....................................................................... 2−2
Power Connection ............................................................... 2−2
Conduit Box .................................................................... 2−2
Power ......................................................................... 2−2
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 For Special Operating Conditions ...................................... 3−3
Authorized Service ............................................................... 3−3
Humidity and Brush Wear .......................................................... 3−4
Commutator .................................................................... 3−4
Rapid Commutator Wear .......................................................... 3−4
Blowers & Filters ................................................................. 3−4
Guide To Commutator Appearance .................................................. 3−5
Continued on next page
Troubleshooting .................................................................. 3−6
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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
Reash Instructions .............................................................. 3−7
Accessories .................................................................... 3−8
Section 4
Connection Diagrams ............................................................... 4−1
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Section 1
General Information
Overview This manual contains general procedures that apply to Baldor Motor products. Be sure to read and understand
the Safety Notice statements in this manual. For your protection, do not install, operate or attempt to perform
maintenance procedures until you understand the Warning and Caution statements.
A Warning statement indicates a possible unsafe condition that can cause harm to personnel.
A Caution statement indicates a condition that can cause damage to equipment.
Important: This instruction manual is not intended to include a comprehensive listing of all details for all procedures required
for installation, operation and maintenance. This manual describes general guidelines that apply to most of the
motor products shipped by Baldor. If you have a question about a procedure or are uncertain about any detail,
Do Not Proceed. Please contact your Baldor District Ofce for more information or clarication.
Before you install, operate or perform maintenance, become familiar with the following:
• NEMA Publication MG-2, Safety Standard for Construction and guide for Selection, Installation and
Use of Electric Motors and Generators.
• The National Electrical Code
• Local codes and Practices
Safety Notice: This equipment contains high voltage! Electrical shock can cause serious or fatal injury. Only qualied personnel
should attempt installation, operation and maintenance of electrical equipment.
Be sure that you are completely familiar with NEMA publication MG-2, safety standards for construction and
guide for selection, installation and use of electric motors and generators, the National Electrical Code and local
codes and practices. Unsafe installation or use can cause conditions that lead to serious or fatal injury. Only
qualied personnel should attempt the installation, operation and maintenance of this equipment.
WARNING: Do not touch electrical connections before you first ensure that power has been disconnected. Electrical
WARNING: Disconnect all electrical power from the motor windings and accessory devices before disassembling of
WARNING: Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure
WARNING: Avoid extended exposure to machinery with high noise levels. Be sure to wear ear protective devices to
WARNING: Surface temperatures of motor enclosures may reach temperatures which can cause discomfort or injury
WARNING: Guards must be installed for rotating parts to prevent accidental contact by personnel. Accidental contact
WARNING: This equipment may be connected to other machinery that has rotating parts or parts that are driven by
WARNING: Do not by-pass or disable protective devices or safety guards. Safety features are designed to prevent
WARNING: Avoid the use of automatic reset devices if the automatic restarting of equipment can be hazardous to
WARNING: Be sure the load is properly coupled to the motor shaft before applying power. The shaft key must be
WARNING: Use proper care and procedures that are safe during handling, lifting, installing, operating and maintaining
WARNING: Pacemaker danger − Magnetic and electromagnetic fields in the vicinity of current carrying carrying
WARNING: Before performing any motor maintenance procedure, be sure that the equipment connected to the motor
WARNING: Motors that are to be used in flammable and/or explosive atmospheres must display the UL label on the
WARNING: Adjustable speed controls may apply hazardous voltages to the motor leads after power to the controller
WARNING: Use only UL/CSA listed explosion proof motors in the presence of flammable or combustible vapors or dust.
WARNING: Motors that are to be used in flammable and/or explosive atmospheres must display the UL label on the
shock can cause serious or fatal injury. Only qualified personnel should attempt the installation, operation
and maintenance of this equipment.
the motor. Electrical shock can cause serious or fatal injury.
that all grounding instructions have been followed. Electrical shock can cause serious or fatal injury.
reduce harmful effects to your hearing.
to personnel accidentally coming into contact 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.
with body parts or clothing can cause serious or fatal injury.
this equipment. Improper use can cause serious or fatal injury. Only qualified personnel should attempt to
install operate or maintain this equipment.
damage to personnel or equipment. These devices can only provide protection if they remain operative.
personnel or equipment.
fully captive by the load device. Improper coupling can cause harm to personnel or equipment if the load
decouples from the shaft during operation.
operations. Improper methods may cause muscle strain or other harm.
conductors and permanent magnet motors can result result in a serious health hazard to persons with
cardiac pacemakers, metal implants, and hearing aids. To avoid risk, stay way from the area surrounding a
permanent magnet motor.
shaft cannot cause shaft rotation. If the load can cause shaft rotation, disconnect the load from the motor
shaft before maintenance is performed. Unexpected mechanical rotation of the motor parts can cause
injury or motor damage.
nameplate along with CSA listed logo. Specific service conditions for these motors are defined in NFPA 70
(NEC) Article 500.
has been turned off. Verify the controller is incapable of delivering hazardous voltages and that the voltage
at the motor leads is zero before proceeding. Failure to observe this precaution may result is severe bodily
injury or death.
nameplate along with CSA listed logo. Specific service conditions for these motors are defined in NFPA 70
(NEC) Article 500.
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Safety Notice Continued
WARNING: UL Listed motors must only be serviced by UL Approved Authorized Baldor Service Centers if these
WARNING: This equipment is at line voltage when AC power is connected. Disconnect and lockout all ungrounded
WARNING: Rotating parts can cause serious or fatal injury. If relubrication is performed with the motor running, to
WARNING: Solvents can be toxic and/or flammable. Follow manufacturer’s safety procedures and directions.
WARNING: Space Heaters operate at line voltage. Disconnect power to space heaters before performing
WARNING: Thermostat contacts automatically reset when the motor has slightly cooled down. To prevent injury or
Caution: To prevent premature equipment failure or damage, only qualified maintenance personnel should
Caution: Do not over−lubricate motor as this may cause premature bearing failure.
Caution: Do not lift the motor and its driven load by the motor lifting hardware. The motor lifting hardware is
Caution: If eye bolts are used for lifting a motor, be sure they are securely tightened. The lifting direction should not
Caution: Do not use the coupling to compensate for poor alignment. This can result in vibration, noise, coupling
Caution: To prevent equipment damage, be sure that the electrical service is not capable of delivering more than
Caution: If a Motor Insulation test (High Potential Insulation test) must be performed, disconnect the motor from
Caution: Do not use Silicone grease or Sealing Compounds (RTV) on or in the vicinity of the motor or its air
Caution: Series wound motors must never be allowed to run with no load (broken belt etc.) An unloaded motor
Caution: Motors designed for forced ventilation must have cooling air when fields are excited at rated voltage.
motors are to be returned to a hazardous and/or explosive atmosphere.
conductors of the ac power line before proceeding. Failure to observe these precautions could result in
severe bodily injury or loss of life.
avoid injury do not contact any rotating parts.
maintenance work on motor. Failure to observe this precaution could result in severe bodily injury or
loss of life.
damage, the control circuit should be designed so that automatic starting of the motor is not possible
when the thermostat resets.
perform maintenance.
adequate for lifting only the motor. Disconnect the load (gears, pumps, compressors, or other driven
equipment) from the motor shaft before lifting the motor.
exceed a 20 ° angle from the shank of the eye bolt or lifting lug. Excessive lifting angles can cause damage.
wear, overloaded bearings and early failure.
the maximum motor rated amps listed on the rating plate.
any Speed Control or drive to avoid damage to connected equipment.
supply. Silicone vapor inside the motor will result in extremely rapid brush wear.
may reach destructive high speeds.
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 insulation life will be significantly reduced.
If you have any questions or are uncertain about any statement or procedure, or if you require additional
information please contact your Baldor District Ofce.
Receiving Each Baldor Electric Motor is thoroughly tested at the factory and carefully packaged for shipment. When you
receive your motor, there are several things you should do immediately. Do not unpack until ready for use.
1. Observe the condition of the shipping container and report any damage immediately to the commercial
carrier that delivered your motor.
2. Verify that the part number of the motor you received is the same as the part number listed on your purchase order.
Lifting Magnet Generators
Caution: Do not lift the motor and its driven load by the motor lifting hardware. The motor lifting hardware is
Treat Baldor lifting magnet generators like motors during installation or maintenance.
Generally, they have standard compound self-excited elds. Standard magnetism is for counter-clockwise
rotation (facing the drive end of the motor). To reverse (operate clockwise), refer to the connection diagrams in
Section 4 of this manual.
adequate for lifting only the motor. Disconnect the load (gears, pumps, compressors, or other driven
equipment) from the motor shaft before lifting the motor.
Handling The motor should be lifted using the lifting lugs or eye bolts provided.
1. Use the lugs or eye bolts provided to lift the motor. Never attempt to lift the motor and additional
equipment connected to the motor by this method. The lugs or eye bolts provided are designed to lift only
the motor. Never lift the motor by the motor shaft or the hood of a WPII motor. If eye bolts are used for
lifting a motor, be sure they are securely tightened. The lifting direction should not exceed a 20° angle from
the shank of the eye bolt. Excessive lifting angles can cause motor damage.
2. To avoid condensation inside the motor, do not unpack until the motor has reached room temperature.
(Room temperature is the temperature of the room in which it will be installed). The packing provides
insulation from temperature changes during transportation.
3. When lifting a WPII (Weather Proof Type 2) motor, do not lift the motor by inserting lifting lugs into holes on
top of the cooling hood. These lugs are to be used for hood removal only. A spreader bar should be used
to lift the motor by the cast lifting lugs located on the motor frame.
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4. If the motor must be mounted to a plate with the driven equipment such as pump, compressor etc., it may
not be possible to lift the motor alone. For this case, the assembly should be lifted by a sling around the
mounting base. The entire assembly can be lifted as an assembly for installation.
Do not lift the assembly using the motor lugs or eye bolts provided. Lugs or eye bolts are designed to lift
motor only. If the load is unbalanced (as with couplings or additional attachments) additional slings or other
means must be used to prevent tipping. In any event, the load must be secure before lifting.
Storage Storage requirements for motors and generators that will not be placed in service for at least six months from
date of shipment. To avoid condensation inside the motor, do not unpack until the motor has reached room
temperature. (Room temperature is the temperature of the room in which it will be installed). The packing provides
insulation from temperature changes during transportation.
Improper motor storage will result in seriously reduced reliability and failure. An electric motor that does not
experience regular usage while being exposed to normally humid atmospheric conditions is likely to develop rust
or rust particles on surrounding surfaces to contaminate the bearings. The electrical insulation may absorb an
excessive amount of moisture leading to the motor winding failure.
A wooden crate “shell” should be constructed to secure the motor during storage. This is similar to an export box
but the sides & top must be secured to the wooden base with lag bolts (not nailed as export boxes are) to allow
opening and reclosing many times without damage to the “shell”.
Minimum resistance of motor winding insulation is 5 Meg ohms or the calculated minimum, which ever is greater.
Minimum resistance is calculated as follows: Rm = kV + 1
where: (Rm is minimum resistance to ground in Meg−Ohms and
kV is rated nameplate voltage dened as Kilo−Volts.)
Example: For a 480VAC rated motor Rm =1.48 meg−ohms (use 5 MΩ).
For a 4160VAC rated motor Rm = 5.16 meg−ohms.
Preparation for Storage
1. Some motors have a shipping brace attached to the shaft to prevent damage during transportation. The
shipping brace, if provided, must be removed and stored for future use. The brace must be reinstalled to hold
the shaft rmly in place against the bearing before the motor is moved.
2. Store in a clean, dry, protected warehouse where control is maintained as follows:
a. Shock or vibration must not exceed 2 mils maximum at 60 hertz, to prevent the bearings from
brinelling. If shock or vibration exceeds this limit vibration isolation pads must be used.
b. Storage temperatures of 10°C (50°F) to 49°C (120°F) must be maintained.
c. Relative humidity must not exceed 60%.
d. Motor space heaters (when present) 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 the minimum resistance, contact your
Baldor District ofce.
b. Place new desiccant inside the vapor bag and re−seal by taping it closed.
c. If a zipper−closing type bag is used instead of the heat−sealed type bag, zip the bag closed instead of
taping it. Be sure to place new desiccant inside bag after each monthly inspection.
d. Place the shell over the motor and secure with lag bolts.
4. Where motors are mounted to machinery, the mounting must be such that the drains and breathers are fully
operable and are at the lowest point of the motor. Vertical motors must be stored in the vertical position.
Storage environment must be maintained as stated in step 2.
5. Motors with anti−friction bearings are to be greased at the time of going into extended storage with periodic
service as follows:
a. Motors marked “Do Not Lubricate” on the nameplate do not need to be greased before or during storage.
b. Ball and roller bearing (anti−friction) motor shafts are to be rotated manually every 3 months and greased
every 6 months in accordance with the Maintenance section of this manual.
c. Sleeve bearing (oil lube) motors are drained of oil prior to shipment. The oil reservoirs must be relled to
the indicated level with the specied lubricant, (see Maintenance). The shaft should be rotated monthly
by hand at least 10 to 15 revolutions to distribute oil to bearing surfaces.
d. “Provisions for oil mist lubrication” – These motors are packed with grease. Storage procedures are the
same as paragraph 5b.
e. “Oil Mist Lubricated” – These bearings are protected for temporary storage by a corrosion inhibitor.
If stored for greater than 3 months or outdoor storage is anticipated, connected to the oil mist system
while in storage. If this is not possible, add the amount of grease indicated under “Standard Condition”
in Section 3, then rotate the shaft 15 times by hand.
6. All breather drains are to be fully operable while in storage (drain plugs removed). The motors must be stored
so that the drain is at the lowest point. All breathers and automatic “T” drains must be operable to allow
breathing and draining at points other than through the bearings around the shaft.
Vertical motors should be stored in a safe stable vertical position.
7. Coat all external machined surfaces with a rust preventing material.
An acceptable product for this purpose is Exxon Rust Ban # 392.
8. Carbon brushes should be lifted and held in place in the holders, above the commutator, by the brush
holder ngers. The commutator should be wrapped with a suitable material such as cardboard paper as a
mechanical protection against damage.
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Non−Regreaseable Motors
Non−regreasable motors with “Do Not Lubricate” on the nameplate should have the motor shaft rotated
15 times to redistribute the grease within the bearing every 3 months or more often.
All Other Motor Types
Before storage, the following procedure must be performed.
1. Remove the grease drain plug, if supplied, (opposite the grease tting) on the bottom of each bracket prior
2. The motor with regreasable bearing must be greased as instructed in Section 3 of this manual.
3. Replace the grease drain plug after greasing.
4. The motor shaft must be rotated a minimum of 15 times after greasing.
5. Motor Shafts are to be rotated at least 15 revolutions manually every 3 months and additional grease
6. Bearings are to be greased at the time of removal from storage.
Removal From Storage
1. Remove all packing material.
2. Measure and record the electrical resistance of the winding insulation resistance meter at the time
3. Regrease the bearings as instructed in Section 3 of this manual.
4. Reinstall the original shipping brace if motor is to be moved. This will hold the shaft rmly against the
to lubricating the motor.
added every nine months (see Section 3) to each bearing.
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, contact your Baldor District ofce.
bearing and prevent damage during movement.
EMC Compliance Statement for European Union
The motors described in this instruction manual are designed to comply 2004/108/EC . These motors are
commercial in design and not intended for residential use. When used with converters, please consult
converter manufacturers literature regarding recommendations on cable types, cable shielding, cable shielding
termination, connection recommendations and any lters which may be recommended for EMC compliance.
For additional information, consult Baldor MN1383.
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