MK Diamond Baldor Motor User Manual
Integral Horsepower
AC Induction Motors
ODP, WPI Enclosures
TENV, TEAO, TEFC Enclosure
Explosion Proof
7/14 Installation & Operating Manual MN408
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Important:
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Table of Contents
Section 1
General Information ................................................................. 1-1
Overview ....................................................................... 1-1
Limited Warranty ................................................................. 1-1
Safety Notice ................................................................... 1-1
Receiving ...................................................................... 1-2
Handling ........................................................................ 1-2
Storage ........................................................................ 1-3
Removal From Storage ............................................................ 1-4
Equipment Marking for IEC Certied Product ........................................... 1-5
EMC Compliance Statement for European Union ........................................ 1-5
Section 2
Installation & Operation .............................................................. 2-1
Overview ....................................................................... 2-1
Location ........................................................................ 2-1
Mounting Location ................................................................ 2-1
Frame Mounting Holes ......................................................... 2-2
Alignment ................................................................... 2-2
Doweling & Bolting ............................................................ 2-2
Guarding .................................................................... 2-3
Power Connection ................................................................ 2-3
Grounding .................................................................. 2-3
Conduit Box ................................................................. 2-3
AC Power ................................................................... 2-4
Rotation ................................................................... 2-4
Connection Diagrams ............................................................. 2-5
Initial Lubrication ................................................................. 2-7
First Time Start Up ............................................................... 2-7
Coupled Start Up ................................................................. 2-8
Jogging and Repeated Starts ....................................................... 2-8
Hazardous Locations ............................................................. 2-8
Selection .................................................................... 2-8
Protection Concepts ........................................................... 2-8
Repair of Motors used in Hazardous Locations ......................................... 2-10
Section 3
Maintenance & Troubleshooting ....................................................... 3-1
General Inspection ................................................................ 3-1
Relubrication & Bearings .......................................................... 3-1
Relubrication Intervals ............................................................. 3-2
Relubrication Procedure ........................................................... 3-4
Shaker Duty Motors only ........................................................... 3-4
Troubleshooting Chart ............................................................ 3-5
Suggested bearing and winding RTD setting guidelines for Non−Hazardous Locations ONLY ..... 3-6
iMN408
ii MN408
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 distributor for
more information or clarification.
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.
• IEC 34−1 Electrical and IEC72−1 Mechanical specications
• ANSI C51.5, the National Electrical Code (NEC) and local codes and practices.
Limited Warranty
www.baldor.com/support/warranty_standard.asp
Safety Notice: This equipment contains high voltage! Electrical shock can cause serious or fatal injury. Only qualified
WARNING: Do not touch electrical connections before you first ensure that power has been disconnected.
WARNING: Disconnect all electrical power from the motor windings and accessory devices before disassembly of
WARNING: Be sure the system is properly grounded before applying power. Do not apply AC power before you
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
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: UL Listed motors must only be serviced by UL Approved Authorized Baldor Service Centers if these
WARNING: Thermostat contacts automatically reset when the motor has slightly cooled down. To prevent injury or
WARNING: Use proper care and procedures that are safe during handling, lifting, installing, operating and
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
Continued on next page.
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 qualified personnel should attempt the installation, operation and maintenance of this
equipment.
Electrical 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.
ensure that all grounding instructions have been followed. Electrical shock can cause serious or fatal
injury. National Electrical Code and Local codes must be carefully followed.
reduce harmful effects to your hearing.
injury 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.
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.
motors are to be returned to a hazardous and/or explosive atmosphere.
damage, the control circuit should be designed so that automatic starting of the motor is not possible
when the thermostat resets.
maintaining 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.
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.
General Information 1-1MN408
Safety Notice Continued
WARNING: Do not use non UL/CSA listed explosion proof motors in the presence of flammable or combustible
WARNING: Motors that are to be used in flammable and/or explosive atmospheres must display the UL label on the
WARNING: Guards must be installed for rotating parts such as couplings, pulleys, external fans, and unused shaft
Caution: To prevent premature equipment failure or damage, only qualified maintenance personnel should
Caution: Do not over tension belts. Excess tension may damage the motor or driven equipment.
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
Caution: To prevent equipment damage, be sure that the electrical service is not capable of delivering more than
Caution: If a HI POT test (High Potential Insulation test) must be performed, follow the precautions and procedure
Caution: The space heaters are designed to operate at or below the maximum surface temperature stated on the
Caution: Shaker Duty motors must be properly lubricated prior to Start Up to prevent damage. See Section 3.
vapors or dust. These motors are not designed for atmospheric conditions that require explosion proof
operation.
nameplate along with CSA listed logo. Specific service conditions for these motors are defined in NFPA
70 (NEC) Article 500.
extensions, should be permanently guarded to prevent accidental contact by personnel. Accidental
contact with body parts or clothing can cause serious or fatal injury.
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.
not exceed a 20 º angle from the shank of the eye bolt or lifting lug. Excessive lifting angles can cause
damage.
the maximum motor rated amps listed on the rating plate.
in NEMA MG1 and MG2 standards to avoid equipment damage.
nameplate. If the marked ambient and/or voltage are exceeded this maximum surface temperature can
be exceeded and can damage the motor windings. If applied in a division 2 or zone 2 environment this
excessive temperature may cause ignition of hazardous materials.
If you have any questions or are uncertain about any statement or procedure, or if you require additional
information please contact your Baldor distributor or an Authorized Baldor Service Center.
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.
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.
Handling The motor should be lifted using the lifting lugs or eye bolts provided.
Caution: Do not lift the motor and its driven load by the motor lifting hardware. The motor lifting hardware is
adequate for lifting only the motor. Disconnect the load (gears, pumps, compressors, or other driven
equipment) from the motor shaft before lifting the motor.
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.
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.
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. 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.
1-2 General Information MN408
Storage Storage requirements for motors and generators that will not be placed in service for at least six months from
date of shipment.
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 in the bearings or rust particles from surrounding surfaces may 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 M Ω).
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 ºC (50 ºF) to 49 ºC (120 ºF) 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.
General Information 1-3MN408
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.
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
to lubricating the motor.
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
added every nine months (see Section 3) to each bearing.
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 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.
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
bearing and prevent damage during movement.
1-4 General Information MN408
Equipment Marking for IEC Certified Product
Temperature Class
AT
Mark
PlaceofManufacture
IEC certied products have special markings that identify the protection concept and environment
requirements. An example is shown in Figure 1-1.
Figure 1-1 IEC Certified Product Markings
Ex Protection Concept (ExnA)
GasGroup (IIC)
AmbientRange
ExnA MOTOR
ATEX Specific
Markingof
ExplosionProtection
EX EquipmentGroup andCategory(II3)
Type of Atmosphere: G--Gas,D-- Dust (G)
Specific Conditions of Use:
If the motor certicate number is followed by the symbol “X”, this indicates that the motor has specic
conditions of use which are indicated on the certicate. It is necessary to review the product certication
certicate in conjunction with this instruction manual.
Operation On Frequency Converters:
If the motor is evaluated for operation with an adjustable speed drive, the type of converter (for example PWM
for Pulse Width Modulated) and safe speed ranges (for example 0- 120Hz) will be specied in the certication
documents or on motor nameplates. It is necessary to consult the adjustable speed drive
manual for proper set up. IECEx Certicates are available online at www.iecex.com
Unit Conversions
Inches to Millimeters Inches x 25.4 = mm
Millimeters to Inches mm x .03937 = Inches
Horsepower to Kilowatts Hp x .746 = Kw
Kilowatts to Horsepower Kw x 1.341 = Hp
Pounds to Kilograms Lbs x .454 = Kg
Kilograms to Pounds Kg x 2.205 = Lbs
ExnA IICGcTamb ºCto ºC
II 3G IP______
Sira__________________
IECEx__________________
MFG. BY BALDOR ELECTRIC FORT SMITH, AR 72901USA
European Conformity
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.
General Information 1-5MN408
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