Rockwell Automation 1329M User Manual

Installation, Operation

and Maintenance Manual

AC Induction Motors

• 56 - 5000 Frame

Manufactured for Allen-Bradley by Marathon Electric, Inc.

2 AC Induction Motors

Contents General Information

Acceptance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation

Uncrating and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Floor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

V-Belt Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Direct Connected Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Thermal Protector Information . . . . . . . . . . . . . . . . . . . . . . . 6

Changing Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Reduced Voltage Starting . . . . . . . . . . . . . . . . . . . . . . . . . .7

Operation

Allowable Voltage and Frequency Range . . . . . . . . . . . . . . 8

Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Condensation Drain Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Service

Lubrication Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Relubrication Amounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Troubleshooting

Motor Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 11

Parts Description Diagram . . . . . . . . . . . . . . . . . . . . . . . . .13

General Information Important: These instructions must be followed to ensure safe and

proper installation, operation and maintenance of the motor. They should be brought to the attention of all persons who install, operate or maintain this equipment.

Motors are all fully factory tested and inspected before shipping. Damage during shipment and storage can occur. Motors not correctly matched to the power supply and/or the load will not operate properly. These instructions are intended as a guide to identify and eliminate these problems before they are overlooked or cause further damage.

Acceptance

Check carefully for any damage that may have occurred in transit. If any damage or shortage is discovered, do not accept until an appropriate notation on the freight bill is made. Any damage discovered after receipt of equipment should be immediately reported to the carrier.

AC Induction Motors 3

Storage

1. Keep motors clean.

• Store indoors.

• Keep covered to eliminate airborne dust and dirt.

• Cover openings for ventilation, conduit connections, etc.to

prevent entry of rodents, snakes, birds, and insects, etc.

2. Keep motors dry.

• Store in a dry area indoors.

• Temperature swings should be minimal to guard against

condensation.

• Space heaters are recommended to prevent condensation.

• Treat unpainted ﬂanges, shafts, and ﬁttings with a rust

inhibitor.

• Check insulation resistance before putting motor into service. (Consult manufacturer for guidelines).

3. Keep Bearings Lubricated.

• Once per month, rotate shaft several turns to distribute grease

in bearings.

• If unit has been stored more than one year, add grease before start-up. (Refer to

“Lubrication Procedures” on page 9).

Installation Uncrating and Inspection

After uncrating, check for any damage which may have been incurred in handling. The motor shaft should turn freely by hand. Repair or replace any loose or broken parts before attempting to use the motor. Check to be sure that motor has not been exposed to dirt, grit, or excessive moisture in shipment or storage before installation.

Measure insulation resistance (see dry the windings as required. Never start a motor which has been wet without having it thoroughly dried.

Safety

Motors should be installed, protected and fused in accordance with latest issue of National Electrical Code, NEMA Standard Publication No. MG 2 and local codes.

Eyebolts or lifting lugs are intended for lifting the motor only. These lifting provisions should never be used when lifting or handling the motor with other equipment (i.e. pumps, gear boxes, fans or other driven equipment) as a single unit. Be sure the eyebolt is fully threaded and tight in its mounting hole.

Eyebolt lifting capacity ratings is based on a lifting alignment coincident with the eyebolt centerline. Eyebolt capacity reduces as deviation from this alignment increases. See NEMA MG 2.

Frames and accessories of motors should be grounded in accordance with National Electrical Code (NEC) Article 430. For general information of grounding refer to NEC Article 250. Rotating parts such as pulleys, couplings, external fans, and shaft extensions should be permanently guarded.

“Operation” on page 7). Clean and

4 AC Induction Motors

Location

In selecting a location for the motor, consideration should be given to environment and ventilation. A motor with the proper enclosure for the expected operating condition should be selected. The ambient temperature of the air surrounding the motor should not exceed 40˚C (104˚F) unless the motor has been specially designed for high ambient temperature applications. The free ﬂow of air around the motor should not be obstructed.

The motor should never be placed in a room with a hazardous process, or where ﬂammable gases or combustible material may be present, unless it is speciﬁcally designed for this type of service.

1. Dripproof (open) motors are intended for use indoors where atmosphere is relatively clean, dry and non-corrosive.

2. Totally enclosed motors may be installed where dirt, moisture and corrosion are present, or in outdoor locations.

3. Explosion proof motors are built for use in hazardous locations as indicated by Underwriters’ label on motor. Consult UL, NEC, and local codes for guidance. Refer to manufacturer for application assistance.

Floor Mounting

Motors should be provided with a ﬁrm, rigid foundation, with the plane of four mounting pads ﬂat within 0.25 mm (0.010 in.) for 56 to 210 frame; 0.38 mm (0.015 in.) from 250 through 500 frame. This may be accomplished by shims under the motor feet. For special isolation mounting, contact manufacturer for assistance.

V-Belt Drive

1. Select proper type and number of belts and sheaves. Excessive belt load will damage bearings. Sheaves should be in accordance to NEMA Spec. MG-1 or as approved by the manufacturer for a speciﬁc application.

2. Align sheaves carefully to avoid axial thrust on motor bearing. The drive sheave on the motor should be positioned toward the motor so it is as close as possible to the bearing.(104˚F) unless the motor.

3. When adjusting belt tension, make sure the motor is secured by all mounting bolts before tightening belts.

4. Adjust belt tension to belt manufacturers recommendations. Excessive tension will decrease bearing life.

AC Induction Motors 5

Direct Connected Drive

Flexible or solid shaft couplings must be properly aligned for satisfactory operation. On ﬂexible couplings, the clearance between the ends of the shafts should be in accordance with the coupling manufacturer’s recommendations or NEMA standards for end play and limited travel in coupling.

MISALIGNMENT and RUN-OUT between direct connected shafts will cause increased bearing loads and vibration even when the connection is made by means of a ﬂexible coupling. Excessive misalignment will decrease bearing life. Proper alignment, per the speciﬁcations of the coupling being used, is critical.

Some large motors are furnished with roller bearings. Roller bearings should not be used for direct drive.

Electrical Connections

ATTENTION: Install and ground per local and national codes. Consult qualiﬁed personnel with questions or if

repairs are required.

ATTENTION: To guard against personal injury and/or machine damage, assure that the following guidelines are

followed:

• Disconnect power before working on motor or driven equipment.

• Motors with automatic thermal protectors will automatically restart when the protector temperature drops sufﬁciently. Do not use motors with automatic thermal protectors in applications where automatic restart will be hazardous to personnel or equipment.

• Motors with manual thermal protectors may start unexpectedly after protector trips. If manual protector trips, disconnect motor from power line. After protector cools (ﬁve minutes or more) it can be reset and power may be applied to motor.

• Discharge all capacitors before servicing motor.

• Keep hands and clothing away from moving parts.

• Never attempt to measure the temperature rise of a

motor by touch. Temperature rise must be measured by thermometer, resistance, imbedded detector, or thermocouple.

• Electrical repairs should be performed by trained and qualiﬁed personnel only.

• Failure to follow instructions and safe electrical procedures could result in serious injury or death.

• Ensure that safety guards are in use (if required).

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