Rockwell Automation 1329L User Manual

Installation, Operation

and Maintenance Manual

AC Induction Motors

• Frames L180 - L440

• Speciﬁcally designed for use with Adjustable Frequency AC Drives

2 AC Induction Motors

General Description The motors described in this publication are high performance motors

speciﬁcally designed for use with adjustable frequency drives. The basic design includes Class H insulation, 1.0 service factor, 40 degree C ambient, continuous duty. Standard enclosures are totally enclosed blower cooled, totally enclosed fan-cooled, non-ventilated and dripproof force ventilated. Modiﬁcations and accessories are available.

Important: These motors are equipped with metric hardware.

ATTENTION:Only qualiﬁed electrical personnelfamiliar

with the construction and operation of this equipment and the hazards involved should install, adjust, operate, and/or service this motor. Read and understand this manual in its entirety before proceeding. Failure to observe this precaution could result in personal injury or loss of life.

Table of Contents General Description

Receiving and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installation

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

Drain Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Conduit Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Stub Shaft Installation Procedure . . . . . . . . . . . . . . . . . . . . 6

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Encoder Connection Diagrams . . . . . . . . . . . . . . . . . . . . . 10

Motor Application Data

Maximum Safe Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Minimum V-Belt Sheave Diameters . . . . . . . . . . . . . . . . . .12

Shaft Extension and Method of Drive . . . . . . . . . . . . . . . . 12

Shaft Loads - Axial and Radial . . . . . . . . . . . . . . . . . . . . . 13

Operation

Motor Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Maintenance

Lubrication - Frames L180 - L400 . . . . . . . . . . . . . . . . . . . 17

Repacking Bearings or Greasing New Bearings . . . . . . . . 18

Disassembly and Reassembly Instructions

Axial Float . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Anti-Friction Bearing Assemblies . . . . . . . . . . . . . . . . . . . .19

Bearing Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Bracket Re-Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Stub Shaft Removal Procedure . . . . . . . . . . . . . . . . . . . . . 20

Replacement Bearings/Spare Parts . . . . . . . . . . . . . . . . . 21

Parts Identification Drawing . . . . . . . . . . . . . . . . . . . . . . . . 22

Total Service Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Receiving and Handling Acceptance

Thoroughly inspect this equipment before accepting shipment from the transportation company. If any of the goods called for in the bill of lading or express receipt are damaged or the quantity is short, do not accept them until the freight or express agent makes an appropriate notation on your freight bill or express receipt. If any concealed loss or damage is discovered later, notify your freight or express agent at once and request him to make an inspection. We are willing to assist you in collecting claims for loss or damage in shipment; however, this willingness on our part does not remove the transportation company's responsibility in reimbursing you for collection of claims or replacement of material. Claims for loss or damage in shipment must not be deducted from the invoice, nor should payment of the invoice be withheld awaiting adjustment of such claims, as the carrier guarantees safe delivery.

If considerable damage has been incurred and the situation is urgent, contact the nearest Allen-Bradley Sales Ofﬁce for assistance. Please keep a written record of all such communications.

AC Induction Motors 3

Handling

ATTENTION: Eyebolt(s) or lifting lug(s) are intended for

In all cases, care should be taken to assure lifting in the direction intended in the design of the lifting means. Lift using all lugs provided. Likewise, precautions should be taken to prevent hazardous overloads due to deceleration, acceleration or shock forces.

Angle of lift with rope or chain must be greater than 45 degrees from horizontal.

For unusual conditions, such as side-wall and ceiling mounting of horizontal motors or installation of vertical motors shipped in a horizontal position, special precautions must be taken. It is recommended that an experienced rigger be employed.

lifting the motor only with the standard accessories such as tachometer, brakes, etc., mounted by Allen-Bradley. The lifting means on the motor must not be used to lift the unit plus additional equipment. Failure to observe this precaution could result in personal injury.

ATTENTION: Eyebolts may unscrew during lifting. Verify that eyebolts are tight and secure from turning, or lift the unit on a sling or platform. Failure to observe this precaution could result in personal injury.

4 AC Induction Motors

Storage

Motors must be stored in a clean, dry area protected from extremes of temperature, moisture, shock and vibration. Storage temperatures of 10 to 49 degrees C (50 to 120 degrees F) with a maximum relative humidity of 60% must be observed. In addition, motors subjected to extended storage must be handled and treated per the requirements speciﬁed in publication “Motors-5.0.” This publication is available from your Allen-Bradley Sales Ofﬁce or online at: http://www.controlmatched.com.

All drains to be fully operable while in storage, and/or the 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 at points other than through the bearing ﬁts.

Installation Allen-Bradley AC motors are designed and built in accordance with

Safety Standard for Construction and Guide for Selection, Installation and Use Of Electric Motors And Generators published by

the National Electrical Manufacturers Association (NEMA), publication MG-2-1983 (ANSI C51.5). It is recommended that this publication be referred to whenever you select or install any AC motor.

The application of motors and other electrical equipment in hazardous locations is restricted by the National Electric Code. Users must observe these regulations and consult with local code inspection and enforcement agencies to insure compliance.

Location

Locate the machine where the ambient temperature is not over 40 degrees C (104 degrees F) and where clean air has free access to ventilating intake and outlet openings. Except for machines with a suitable protective enclosure, the location should be clean and dry.

Important: The cooling system on standard totally enclosed, blower

cooled motors requires clean air tobe forced through ducts which are integral to the stator frame. It is important that these air passages be kept clean and that sufﬁcient clearance be provided on the blower motor air inlets and stator duct outlets for unrestricted ﬂow of air.

For Drip-Proof Force Ventilated Enclosures, sufﬁcient clearance must be provided on all inlet and outlet openings to provide for unrestricted ﬂow of air. Separately ventilated motors with exhaust to ambient (pipe-in only) must have at least 152.4 mm (6 in.) of clearance between the opening and adjacent walls or ﬂoor.

Important: Motors located in a damp, moist environment must have

space heaters to protect against condensation when motor is not operating.

AC Induction Motors 5

Drain Plugs

If motor is totally enclosed, it is recommended that condensation drain plugs be removed. These are located in the lower portion of the end-shields (not included on L180 frames). Totally enclosed “XT” motors are equipped with automatic drains which should be left in place as received.

Power Supply

This is an adjustable speed motor designed for operation with adjustable frequency drives.

Verify that the motor nameplate data corresponds to the drive output rating and follow the Drive User Manual for motor installation and connection.

Conduit Box

The standard conduit box location for totally enclosed motors is top mounted for F1-F2 versatility without motor disassembly. For dripproof force ventilated, F1 is standard. Conduit box can be rotated in 90 degree increments for lead outlet at front, back or sides. On L180 frame motors the conduit box is mounted on the top for all enclosure types.

Mounting

Motors must be mounted on a rigid, solid base or foundation. Poor base construction may cause resonances in the motor/base assembly which can result in bearing failure and other motor damage. All hold down bolts must be the correct grade for the type of mounting and must be torqued to their recommended value.

Table A Recommended Torque

Recommended Torque

Frame

L180 11.2 (0.44) 3/8-16 45-50 (33-37) 64-72 (47-53)

L210 11.2 (0.44) 3/8-16 45-50 (33-37) 64-72 (47-53)

L250 14.2 (0.56) 1/2-13 113-126 (83-93) 159-179 (117-132)

L280 14.2 (0.56) 1/2-13 113-126 (83-93) 159-179 (117-132)

L320 17.5 (0.69) 5/8-11 210-239 (155-176) 271-338 (200-249)

L360 20.6 (0.81) 3/4-10 372-420 (274-310) 527-597 (389-440)

L400 26.9 (1.06) 7/8-9 588-659 (434-486) 835-934 (616-689)

Hole Diameter

mm (in.)

Belted Drive

Motor slide bases or rails, when used, must be securely anchored to the foundation with the proper bolts.

Bolt Size and Thread

SAE 5

N-m (lb.-ft.)

SAE 8

N-m (lb.-ft.)

Important: The motor shaft and load shaft must be parallel and the

sheaves aligned. Refer to

“Motor Application Data” on

page 11.

6 AC Induction Motors

Coupled Drive

Motors will operate successfully mounted on the ﬂoor, wall or ceiling, and with the shaft at any angle from horizontal to vertical. Special mountings, duty or thrust demands may, however, require a different bearing system.

ATTENTION: Motor C-face is intended for mounting

auxiliary equipment such as pumps and gears. When mounted horizontally, C-face motors should be supported by the feet and not by the C-face. Installations requiring horizontally mounted motor frames L280C and L440 must be supported by the feet as well as C-face or D-ﬂange. Failure to observe these precautions can result in damaged equipment and/or personal injury.

Stub Shaft Installation Procedure

Screw-in Stub Shaft

1. Turn off and lockout power to the motor.

2. Remove in-line blower motor and cover assembly by removing

the hex head cap screws on the cover (if enclosure is TEAOBlower cooled).

Important: An extended blower cover is required whena feedback

device is installed. Contact Allen-Bradley for assistance with an in-line blower.

3. Check the motor shaft center hole for chips, dirt, or other residue

and clean as required.

4. Obtain the stub shaft to be screwed into the motor shaft.

5. Apply an even coat of Loctite

stub shaft thread. Place stub shaft in motor shaft threaded hole and hand tighten.

6. Using a spanner wrench on the motor shaft drive end (or alternate

means of locking motor shaft), torque the stub shaft to 27 N-m (20 lb.-ft.).

7. Using a dial indicator with 0.0005 inch graduations, indicate the

stub shaft to within 0.002 inch T.I.R. When Inland tachometers are used, the tachometer stub shafts must indicate to within 0.001 in. T.I.R.

Number 271 (or equivalent) to the

8. Mount feedback device per manufacturer's instructions.

AC Induction Motors 7

Connections

ATTENTION: The user isresponsible forconforming with

Bypass Mode

If the motor is to be used in bypass mode, the user must select a motor starter and overcurrent protection suitable for this motor and its application. Consult motor starter application data as well as the National Electric Code and/or other applicable local codes. Contact Allen-Bradley to determine suitability of motor for speciﬁc applications in bypass mode.

the National Electrical Code and all other applicable local codes. Wiring practices, grounding, disconnects and overcurrent protection are of particular importance. Failure to observe these precautions could result in severe bodily injury or loss of life.

ATTENTION: This equipment is at line voltage when AC power is connected. Disconnect andlockout all ungrounded conductors of the power line. Failure to observe these precautions could result in personal injury and/or loss of life.

Power Wiring

Single Voltage Motors – On Single voltage, three lead motors, connect leads marked U/T1, V/T2, W/T3, to the appropriate drive output terminals. Refer to the Drive User Manual for further information.

Dual Voltage Motors – Be sure the motor leads are connected properly for the desired “Low” or “High” voltage connection per the motor connection diagram (see below). Refer to the Drive User Manual for proper drive output connections.

3 PHASE-DUAL VOLTAGE

LOW VOLTAGE

P1 P2

U/T1

V/T2

W/T3

T9 T4 T5 T6

THERMOSTAT LEADS

3 PHASE-SINGLE VOLTAGE

P2 U/T1 V/T2

W/T3

P1 P2

U/T1

V/T2

W/T3

T4 T7

T5 T8 T6 T9

THERMOSTAT LEADS

HIGH VOLTAGE

THERMOSTAT LEADS

L1 L2 L3

8 AC Induction Motors

Direction of Rotation

These motors are capable of bi-directional shaft rotation. When voltages in an A-B-C phase sequence are applied to leads U/T1, V/ T2, W/T3, clockwise shaft rotation facing the opposite drive end will result. If shaft rotation is incorrect, change the direction of rotation as follows:

ATTENTION: The drive may apply hazardous voltages to

1. Turn off and lockout all power to the motor. Verify that the

2. Reverse any two of the three motor power leads.

the motor leads after drive power has been removed. Verify that the drive is incapable of delivering hazardous voltages and that the voltage at the motor leads is zero before proceeding. Failure to observe this precaution could result in personal injury and/or death.

voltage at the motor leads is zero.

Thermostat Leads (Thermal Protector)

As a standard feature, these motors have three (3) normally closed thermostats (one per phase) connected in series with leads P1 & P2 and terminated in the main conduit box.

To protect against motor overheating, thermostats must be connected to the appropriate drive circuit (function loss). Failure to connect the

thermostats will void the motor warranty. Follow the Drive User Manual for correct thermostat lead connections.

Blower Motor

Motors which are blower cooled incorporate an independently powered three-phase AC blower motor to assure continuous cooling air ﬂow regardless of motor speed.

ATTENTION: The blower motor is typically wired to the

AC input of the drive and will be energized even when the drive is not running. Remove and lockout the main power supply before touching blower components. Failure to observe this precaution could result in personal injury and/ or death.

Blower motor fuse protection kits are required for blower motor overload protection.

The speciﬁc blower motor will vary depending on frame size and enclosure. Follow the connection diagram supplied with the blower motor, which in general will be one of the following:

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